When symptoms do occur, they can include: Pilonidal cysts do not typically need any treatment unless they become infected. The UF College of Veterinary Medicine is Florida's only veterinary college and provides many unique educational programs for students and services aimed at helping pets, wildlife and endangered species. Together we teach. Wells K, Pendola M. Pilonidal disease and perianal hidradenitis. WebWhile mild pilonidal disease can be treated with a course of antibiotic pills, most cases of pilonidal disease requires surgery to remove the chronic cysts, tracts, and abscesses and break the cycle. To learn more, please visit our. The sample was allocated into 2 groups; acute and chronic. For more extensive surgery with open wound healing, the recovery time can be 612 weeks. A pilonidal cyst is a pocket that forms around a hair follicle in the crease between the buttocks. She frequently writes on mental health, perinatal health, fertility, and parenting topics. WebA pilonidal cyst that is not causing symptoms does not need treatment. It may be hard to remove the entire cyst, so there is a chance that it will come back. Pilonidal is literally from the Latin words pilus and nidus which means a nest of hair. Get prescriptions or refills through a video chat, if the doctor feels the prescriptions are medically appropriate. https://www.thepricer.org/wp-content/uploads/2022/01/pilonidal-cyst-surgery-cost.jpg, https://www.thepricer.org/wp-content/uploads/2022/01/thePricer.png. Treatment should depend on the extent and severity of the disease. Arithmetic mean used as a summary of the quantitative data. This procedure can be performed under local anesthesia. You can also take a sitz bath, which involves running warm water in the bath and sitting in the shallow water. It is very important to keep the area around the wound clean. Comprehensive Laser & Aesthetics Schedule / Consultation Call Us 410.595.2727 Contact Us Recurrence Rate After Pilonidal Surgery Draining the cyst without complete removal has an Milone M, Fernandez LM, Musella M, Milone F. Safety and Efficacy of Minimally Invasive Video-Assisted Ablation of Pilonidal Sinus: A Randomized Clinical Trial. Cyst not infected Abscess pocket of pus Sinus opening between a cyst or other internal structure and the outside The wound will be covered with a bandage. In general, you should expect surgical fees, facility fees, and The procedure has minimal risk and is of short duration. The mean age of the sample was 23 8 years, and the mean body mass index (BMI) was 29.7 6 Kg/m2. Pilonidal abscess; Pilonidal dimple; Pilonidal disease; Pilonidal cyst; Pilonidal sinus. The correctness of the diagnosis confirmed by correlating the theater note and the discharge summary. The recurrence rate in this study is approximately 7.2%. most common reasons people visit a doctor. In conclusion, PND still has challenges in its management. MDSave.com is a website that brings together the patients and the doctors who post their prices. A study of 366 with PND, 19 of those were identified as secondary cases and excluded. Your body treats this hair as a foreign substance and creates a cyst around the hair. Psoriatic Arthritis Rash: Identification and Treatment. Your email address will not be published. Federal government websites often end in .gov or .mil. This website is not a substitute for care by a licensed medical professional. Doctors are not sure exactly why some people get pilonidal cysts. Primary closure calls for stitching up the wound after removing the offending tissue. A member of the Reddit forum said that he had to pay around $750 for this For US based patients, some advice on working with insurers and the usual billing codes. Three-quarter of the recurrence will occur in the first 5 years post-surgery.6 Smoking and BMI fail statistically to have an influence on wound healing or disease recurrence.29,30 Alptekn et al31 demonstrate a higher recurrence rate to be encountered when higher specimen volume excised. Call your doctor if you have symptoms of infection because you may need a prescription for antibiotics. Multiple regression was applied to determine the significant predictor of recurrence. Pilonidal cyst. This procedure is done as an outpatient procedure, so you will not need to spend the night in the hospital. For a simple lancing technique, it can take 46 weeks to heal completely. The pathogenesis of PND still being in the debate. Local anesthesia is used to numb the skin. Follow instructions on when to arrive at the hospital. The treatment of a complicated pilonidal cyst (pilonidal abscess) is surgical and consists of incision and evacuation of the abscess, removal of debris, hygiene, and daily dressing of the wound until healing. A cut is made in the cyst to drain fluid and pus. Depending on how much tissue is removed, the area may or may not be packed with gauze. An infected pilonidal cyst or abscess requires surgical drainage. At IBI Healthcare Institute, all-inclusive transparent pricing is offered that automatically The American Society of Colon and Rectal Surgeons' clinical practice guidelines for the management of pilonidal disease. Merchea A, Larson DW. Ask your doctor which medicines you should take on the day of your surgery. The average costs for surgery depend on the type of procedure you are having, where you live, what kind of coverage you have (if any). Accessibility The remaining 347 primary cases were involved in this study. Johnson EK, Vogel JD, Cowan ML, et al. After it heals, shaving the hair in the wound area may help prevent pilonidal disease from coming back. It defines as an infection under the skin that usually occur in the gluteal region.1 It is also reported to occur in the umbilicus and the interdigital spaces.2,3 The incidence reaches to 26/100,000 person with 3:1 male predominance.4 It can be presented as an acute inflammation with a collection of pus, or a chronic sinus that is chronically draining pus. Privacy Policy|Advertising Policy|Privacy Preferences Center|Do Not Sell My Personal Information. Data collection include patient demographic data, clinical presentation, clinical management, and recurrence rate. Call your doctor or 911 if you think you may have a medical emergency. In some cases, this cyst can become infected, forming an abscess. Demographic characteristics of 347 patients with pilonidal disease. WebPilonidal disease is a chronic skin infection in the crease of the buttocks near the coccyx (tailbone). WebEvergreen Surgical Pilonidal Clinic. All Rights Reserved. government site. The pain is 8/10 and it oozed green pus and blood. When this happens, the pressure and rubbing can catch the hair and push it down into the skin. My boyfriend had a pilonidal cyst removed one month ago, still having severe pain, CT showed nothing what could be happening? Get answers from Dermatologists and top U.S. doctors, Our doctors evaluate, diagnose, prescribe, order lab tests, and recommend follow-up care. and the track that connects to it. An official website of the United States government. However, in most cases, they develop when the hairs surrounding the crease of the buttock grow into the skin. Keep in mind that you can usually negotiate a discount in fees if you are paying in cash or credit card. Can it be that a removed pilonidal cyst be back again ? A BMI with a p-value of 0.05 may also play a role in disease recurrence as shown in Table 3. Your healthcare professional will also ask you some questions about your symptoms. The main treatment for an acute abscess is drainage, which is done through an incision that allows the pus to drain, reducing inflammation and pain. Your provider can help. The .gov means its official. The loose hair plays the first factor as an invader, which applies some force to be inserted into the skin depending on its vulnerability.8,9 The patient occupation may also play a role in the disease development, in military service members, 11% of cases develop recurrence.10 Levinson et al11 found that male combatant and female driver have the highest risk of developing PND among soldiers. . The most predominate factors associated with recurrence were prolong sitting job, young age group, and high BMI. Your provider may recommend this procedure if you have pilonidal disease that is causing pain or infection. Check with them regarding your deductible. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Aftercare of the wound is important to prevent infection. Pilonidal cystectomy -- If you keep having problems with a pilonidal cyst, it can be removed surgically. A median follow-up period of 2 weeks (1 to 85 weeks) of 347 patients involved in the study until the end of the study period of December 2013. A pilonidal cyst is a skin condition that can cause pain, inflammation, and swelling near the tailbone. The price of the pilonidal cyst surgery will be influenced by some factors such as your health insurance coverage, the place you are living, the billing inclusions, the surgeon you choose, the type of the procedure, and the facility. An addiction and pain medicine Nondiscrimination and Accessibility Notice. By logistic regression to the recurrence group, young age group, prolong sitting and BMI may increase the likelihood of the disease recurrence. Look for a doctornear you from our worldwide list of Cleft Lift surgeons and recommendations on our forums. For this study purpose the diagnosis definition of acute PND is the presence of acute inflammation or acute collection; with or without sinus while the chronic disease presented with an intermittent or chronic draining of pus. They The recurrence rate after drainage of the pilonidal abscess is around 40-50%, the full excision at this stage being difficult and often incomplete due to the local inflammatory process, which leads to recurrence of the disease. Established in 1923, the College of Pharmacy is the oldest college in the UF Academic Health Center. To do this, use warm compresses on the area several times per day. 20th ed. Depth measurement by methylene blue showed 0.27 decrease likelihood of recurrence with a statically significance of 0.03. Surgery is needed to drain and remove a pilonidal cyst that does not heal. WebFind a Pilonidal Surgeon. It can be conducted as an outpatient treatment under infiltrative anaesthesia The procedure: After the anaesthesia has been administered and the surgical field has been prepared, the pilonidal cyst is cut in its upper end. WebEvergreen Surgical Pilonidal Clinic. They will want to perform a physical exam and inspect the area, looking especially for any signs or symptoms of infection. The right creams and skin care products can help your skin glow, but nourishment from the inside out is just as important. PMID: 30640830 www.ncbi.nlm.nih.gov/pubmed/30640830. Milone M, Di Minno MN, Bianco P, Coretti G, Musella M, Milone F. Pilonidal sinus surgery: could we predict postoperative complications? The Pilonidal Support Alliance is a California Non-Profit Corp and tax exempt under IRS 501(c) (3). Doctors typically provide answers within 24 hours. However, you can better manage your flares and reduce your risk of serious psoriasis-related conditions by eating healthy. Program completed entirely in Jacksonville. Some people do not have any symptoms at all. Shaving or laser removal of hair around the cyst. Lancings: range from $100 to $400 USD Conservative Treatments: range from $500 to $2,000 USD Excision Treatments: range from $3,000 to $6,000 USD Flap Pilonidal cysts can recur after surgery. Received 2016 Jul 11; Accepted 2016 Oct 19. What is the risk of not having a pilonidal cyst removed? Sometimes a tube is placed to drain fluid that collects after surgery. Pilonidal disease, also known as pilonidal sinus or pilonidal cyst, is a chronic skin condition characterized by the formation of an abnormal small sack on the skin containing hair and fragments of skin, most commonly located between the coccygeal bone and buttocks. If the pilonidal cyst is not causing any symptoms, you may not need treatment. Standards Practice Task Force of the American Society of Colon and Rectal Surgeons. The gauze has to be changed often during this time. Kaplan-Meier curve of recurrent pilonidal disease in patients following discharge; p=0.17 log-rank test. The cyst might come back in between 10% and You may be asked to temporarily stop taking blood thinners, such as aspirin, ibuprofen (Advil, Motrin), naproxen (Aleve, Naprosyn), vitamin E, clopidogrel (Plavix), warfarin (Coumadin), and any other medicines like these. How much does it hurt to get the packing removed from a pilonidal cyst without going to see a surgeon!. THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. Within 85 weeks, 7.2% had a recurrence of PND during the follow-up. 0 If a pilonidal cyst becomes infected, the resulting abscess is often extremely painful. 7,752,060 and 8,719,052. Also, keep the area as clean as possible by washing it with mild soap and drying it completely. The vast majority of patients with pilonidal cyst show no symptoms, the only sign being a prominent, small swelling of the skin in the sacrococcygeal region. The condition can be acute or chronic. This is similar to how your body reacts when you get a cut or have a splinter. Enriquez-Navascues JM, Emparanza JI, Alkorta M, Placer C. Meta-analysis of randomized controlled trials comparing different techniques with primary closure for chronic pilonidal sinus. Pilonidal disease (PND) is a common clinical problem that leads to decrease in work productivity, especially in healthy young adults. Mix equal amounts of baking soda and white vinegar to form a paste.Rub the paste over the cyst and leave it on for 15 to 20 minutes.Wash it off with clean, cool water.Repeat this daily until you get rid of pilonidal cysts. hb```U" ce`a`0PeqGB/p5582V#UiI"IR@U5@5&PJH7 9:L[HK , A pilonidal cyst is a sac that forms around hair trapped in the skin at the crease of the buttocks. Healthgrades Can Help. We are one of the few clinics in the country with a special interest in treating difficult pilonidal disease. To estimate the rate of the Pilonidal disease (PND) recurrence and to evaluate the associated predictors of the recurrence. The terms cyst, sinus, and abscess refer to different stages of the disease process. In the United States, about 70,000 people per year develop it, according to the Get prescriptions or refills through a video chat, if the doctor feels the prescriptions are medically appropriate. %PDF-1.6 % It shows to be effective, safe, with faster return to work and daily activities.25,26, Post-operative wound care is one of the important measures studied in the literature. Dr. Hadeed is a board-certified plastic surgeon with years of experience treating cysts and getting patients back to the life they want to live. Young age was associated with increased likelihood of exhibiting recurrence by 1.19 times. A logistic regression was performed to ascertain the effects of age, gender, occupation, smoking, body mass index (BMI), chronicity, type of the operative, measurement of the depth intra-op and post-op antibiotic on the likelihood that participants have recurrence of PND. The following factors increase the likelihood of developing pilonidal cysts: Exactly when a pilonidal cyst will clear up depends on how extensive it is. The ideal technique should be simple, less painful, low cost, can be carried out under local anesthesia with low recurrence rate and shorter time to get back to daily activities.9 Meta-analytic studies showed lower recurrence rate of wide excision leaving the wound open compared with primary closure. Al-Khamis A, McCallum I, King PM, Bruce J. Healing by primary versus secondary intention after surgical treatment for pilonidal sinus. Created for people with Together we care for our patients and our communities. %%EOF Because of the location of these cysts, it might feel embarrassing to discuss your symptoms with your healthcare professional. Also, she recommends removing the cyst as soon as it appears because if left growing, it will result in high costs for treatment and pain as well. The recurrence rate in this study is approximately 7.2%. Symptoms of a pilonidal abscess (infected pilonidal cyst) include: There are several steps that can be taken to prevent the appearance or recurrence of pilonidal cysts. If you have drainage, this is most likely pus, and it can smell bad. Required fields are marked *. Family history is one of the non-modifiable risk factors for developing PND.12,13 Furthermore, prolong sitting or driving more than 4 to 6 hours with less number of baths per week considered to be a risk for PND.12,14 Bolandparvaz et al12 added overweight with BMI more than 25 Kg/m2 to be significantly associated with the development of PND. WebLaser Assisted Endoscopic Pilonidal Sinus Treatment (LA-EPSiT) is an exclusive treatment of choice at our clinic for most of our Pilonidal Cyst patients, it is the combination of the Aji Segre D, Pozzo M, Perinotti R, Roche B. Italian Society of Colorectal Surgery. Clinical rotations in all the major disciplines are provided for UFCOM undergraduate medical students and elective rotations to students from other accredited schools. Contact Us. 2019;62(2):146-157. WebFind a Pilonidal Surgeon We do not make specific surgeon referrals, what we can do is give patients a map of where surgeons are located who are doing ADVANCED Pilonidal Non-surgical treatment may be used if the area is not infected: Pilonidal cyst resection is generally safe. The main overview page for our Treatments section where you can review surgery options, plan for surgery day. Consider these nine foods to help keep your skin looking youthful and radiant. In a surveillance study of approximately 19,013 candidates, pilonidal sinus was detected in approximately 6.6% of the candidates.5 The aim of this study is to estimate the rate of the disease recurrence and to evaluate the associated predictors of the recurrence. These courses share the latest in medical knowledge, teach new patient-relationship skills and help providers deal with relevant current issues. This is where it's worthwhile to comparison shop. More extensive procedures with flaps are generally reserved in the us for more extensive or recurrent disease. WebPilonidal cysts are also more common among men in their 20s. The tube is removed at a later time when the fluid stops draining. We routinely take care of patients with pilonidal cysts, non-healing pilonidal wounds, and pilonidal abscesses with great success in the pediatric, teen, and adult age groups. Armed Forces Health Surveillance Center (AFHSC) Pilonidal cysts, active component, US Armed Forces 2000-2012. Your provider will show you how to care for your wound. Sign up for skin-related news from Healthgrades. Answers that she had to pay $12,500 for her childs pilonidal surgery. This website is not a substitute for care by a licensed medical professional. Ponten JB, Ponten JE, Luyer MD, Nienhuijs SW. An umbilical surprise: a collective review on umbilical pilonidal sinus: An uncommon alternative diagnosis in common umbilical symptoms. Results of a randomized and controlled clinical trial on 803 consecutive patients. Data analysis were carried out using the Statistical Package for the Social Sciences version 20 (IBM Corp., Armonk, NY, USA). To check for this, your healthcare professional may want to order additional testing, such as a CT scan. Information, treatments, and support for Pilonidal Disease patients and medical professionals. Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Different surgeon, hospital or surgicenter all charge differently. Lay open technique is wide excision of the pilonidal sinus with leaving the wound to be healed by secondary intention. Surgeons fee Again, depending on the billing policy, the surgeons fee may or may not be included in the initial quote. This common type of cyst is located in the crease of the buttocks and is usually caused by a skin infection. Pilonidal cyst surgery is a more definitive modality of treatment as compared to non-surgical approaches. For potential or actual medical emergencies, immediately call 911 or your local emergency service. The map below shows the known surgeons who are performing either Cleft Lift/Kardakis, Gips/Pit Picking, or EPSiT. The UF College of Nursing continually attracts and retains the highest caliber of nursing students and faculty with a passion for science and caring. The standard deviation used as a measure of dispersion. Information, treatments, and support for Pilonidal Disease patients and medical professionals. Patient characteristics and symptoms in chronic pilonidal sinus disease. Milone M, Musella M, Di Spiezio Sardo A, Bifulco G, Salvatore G, Sosa Fernandez LM, et al. }0, f@dD$SJAlj 3S) Pilonidal Cystectomy has a higher success rate as compared to incision and drainage. The treatment of pilonidal disease: guidelines of the Italian Society of Colorectal Surgery (SICCR). According to this portal, the national average cost of pilonidal cyst surgery is $3,000. I had a pilonidal cyst removed& a wound vac placed it used to make noise but is now silent except periodically it makes noise is this normal? Severe pain and symptoms of inflammation, such as swelling and discoloration, could mean that you have a bacterial infection at the site. The site is secure. Sabiston Textbook of Surgery: The Biological Basis of Modern Surgical Practice. Doll et als6 study stated that recurrence could be up to 22 years with a long follow-up, however, it is not practical to follow up all patient for 22 years. Doll D, Matevossian E, Wietelmann K, Evers T, Kriner M, Petersen S. Family history of pilonidal sinus predisposes to earlier onset of disease and a 50% long-term recurrence rate. National Library of Medicine A pilonidal cyst is a symptom of pilonidal disease, which is a chronic skin infection. The cyst is almost always near Hospital costs also vary a great deal, not to mention that billing errors are frequent. Surgical procedure of PND can be conducted using spinal or general anesthesia with no difference between them in the recurrence rate or postoperative pain.15 When PND presented with asymptotic midline pit, the German National Guidelines do not advocate surgery to treat these cases as it has no advantages over surgery of symptomatic patients in terms of decreasing recurrence rate.16. We do not make specific surgeon referrals, what we can do is give patients a map of where surgeons are located who are doing ADVANCED Pilonidal procedures. I've had a pilonidal cyst since i was 20, at least that's when i first discovered it. In: Yeo CJ, ed. Treatment should depend on the extent and severity of the disease. Doll D, Krueger CM, Schrank S, Dettmann H, Petersen S, Duesel W. Timeline of recurrence after primary and secondary pilonidal sinus surgery. The treatment of uncomplicated pilonidal cyst (without signs and symptoms of abscess) and the chronic pilonidal cyst is surgical, is performed under spinal anesthesia or analgesia, and consists of wide excision of the entire sinus to healthy tissue, with or without primary suture of the wound, or coverage of the area with skin flaps through different procedures (Limberg, cleft lift Bascom) with variable results depending on the particularities of the case, and the applied technique.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'thepricer_org-box-4','ezslot_6',137,'0','0'])};__ez_fad_position('div-gpt-ad-thepricer_org-box-4-0'); You might also like our articles about the cost to treat Milia, sebaceous cysts, or warts. WebA pilonidal cyst is a round sac of tissue that's filled with air or fluid. Ultimately, it will be what your surgeon is most comfortable with and has done most often. It affects about 70,000 people in the US annually and is more common in men than women. There are numerous surgeries offered for this. If you dont have health insurance coverage, expect to pay anywhere between $1,500 and $3,500 for a straightforward incision and drainage of a smaller-than-average cyst, that doesnt involve any complications. Prevalence of sacrococcygeal pilonidal disease in Turkey. This article explores what can happen if you have a pilonidal cyst, how doctors diagnose these cysts, and the available treatment options. To help prevent pilonidal cysts from occurring, it is important to maintain a moderate weight and take frequent breaks during the day if you sit a lot. All secondary cases who presented with PND and treated before were excluded from this study. Pilonidal cyst surgery is typically a minor outpatient procedure. The wound was not fully healed and one day later it won't stop bleeding. Can You Identify These Well-Known Skin Conditions? The UF College of Dentistry is the only public-funded dental school in Florida and is recognized as one of the top U.S. dental schools for the quality of its educational programs, oral health research enterprise and commitment to patient care and service. Rarely, small tunnels called sinus cavities form underneath the skin. People who sit in a chair for a long time, such as truck drivers, have a higher risk of developing a pilonidal cyst. Editorial team. We got the approval of institutional review board at the University of Dammam for the study. Approximately one-third of the sample has a prolong sitting job. We do not make specific surgeon referrals, what we can do is give patients a map of where surgeons are located who are doing ADVANCED Pilonidal procedures. If you have a pilonidal cyst, your symptoms can range from mild to severe. The treatment of pilonidal cyst depends on the severity of the disease. and transmitted securely. Most often it occurs between puberty and age 40. In some cases, revision McCallum IJ, King PM, Bruce J. Healing by primary closure versus open healing after surgery for pilonidal sinus: systematic review and meta-analysis. This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The College of Public Health & Health Professions (PHHP) is dedicated to providing excellent educational programs that prepare graduates to address the multifaceted health needs of populations, communities and individuals. The mean hospital stay of the patients was 4.4 4.6 days (Table 2). This allows it to heal faster, but increases the chances of complications and recurrence. Authors have no conflict of interest, and the work was not supported or funded by any drug company. This is a retrospective study, conducted at King Fahd Hospital of the University in Alkhobar, Kingdom of Saudi Arabia over a period of 10 years from January 2003 until December 2013. Pilonidal disease still has challenges in its management. Overall recurrence rate after the surgical management was found in 25 patients (7.2%). center, area of the country, doctors fees but cost can be $2000.00 to $4000.00. The logistic regression model was statistically significant, 2(4)=40.640, p<0.001. Karydakis GE. Kanat BH, Szen S. Disease that should be remembered: Sacrococcygeal pilonidal sinus disease and short history. Pilonidal disease occurs most often in peoples 20s and 30s, and it affects more males than females. The UFHSC-J is a clinical teaching site for the Gainesville-based College of Nursing. The patient has difficulty sitting on the chair, and will look for a position that avoids contact of the region with other planes; Swelling in the sacrococcygeal region (interfacial), with reddening of the skin covering the abscess; Loss of blood or pus (in the case of fistulous abscesses), along with the unpleasant odor noticed by the patient. They can determine if treatment is necessary. Video-assisted ablation of pilonidal sinus: a new minimally invasive treatment--a pilot study. To get a diagnosis, you will need to make an appointment with your healthcare professional. Debra G. Wechter, MD, FACS, general surgery practice specializing in breast cancer, Virginia Mason Medical Center, Seattle, WA. The use of negative-pressure wound therapy in pilonidal sinus disease: a randomized controlled trial comparing negative-pressure wound therapy versus standard open wound care after surgical excision. It is intended for informational purposes only. Copyright 2023 Healthgrades Marketplace, LLC, Patent US Nos. This study demonstrates a recurrence rate of 7.2% with a median follow-up of 1.6 years. and Ph.D. degrees in Veterinary Medical Sciences. Pilonidal cysts come back in about one half of the people who have surgery the first time. Docs, could a removed pilonidal cyst be back again ? What happens if you leave a pilonidal cyst untreated? If left untreated, the cyst can drain pus or other fluids, or develop a pilonidal sinus, which is an opening that grows under the skin from the hair follicle. Some of the most common symptoms of a pilonidal cyst infection include skin reddening, pain, and draining of blood or pus. Careers, Unable to load your collection due to an error. A pilonidal (pie-low-NIE-dul) cyst is an unusual pocket in the skin that usually contains hair and skin debris.