{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T05:48:26Z","timestamp":1782452906624,"version":"3.54.5"},"reference-count":37,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T00:00:00Z","timestamp":1780358400000},"content-version":"vor","delay-in-days":1,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T00:00:00Z","timestamp":1780272000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100007605","name":"Aarhus Universitet","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100007605","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Colorectal Disease"],"published-print":{"date-parts":[[2026,6]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>The treatment of chronic pilonidal sinus disease (PSD) is controversial. Minor PSD can be treated minimally invasively. The preferred minimally invasive treatment in Denmark is the Bascom I procedure.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Aim<\/jats:title>\n                    <jats:p>To evaluate re\u2010operation rates following elective Bascom I and to identify potential risk factors.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Using nationwide Danish databases from 2010 to 2021, we identified patients diagnosed with PSD undergoing incident Bascom I. Based on previous surgery, patients were divided into four groups: (i) Bascom I with no previous PSD treatment; Bascom I with history of (ii) one or (iii) two incision &amp; drainage (I&amp;D) procedures; and (iv) Bascom I with history of other PSD procedures. Patients were followed until re\u2010operation, death or emigration. Stratified by sex, 1\u2010, 2\u2010 and 5\u2010year risk of re\u2010operation was examined. A subsequent analysis assessed the risk of re\u2010operation after second Bascom I procedure.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Of 3555 (79% male) PSD patients undergoing Bascom I procedure, 2417 had the procedure without previous PSD surgery, 382 underwent Bascom I after one I&amp;D procedure, 108 after two I&amp;D procedures and 648 after other\/more PSD procedures. The overall 5\u2010year re\u2010operation risk was 30%, highest in younger age groups. As much as 65% of re\u2010operations occurred within the first 12\u2009months. After a second Bascom I, the 5\u2010year risk was 45%.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>High rates of early failures seem to drive a high risk of re\u2010operation after the Bascom I procedure. Patient selection, technique and training likely need improvements to ensure acceptable outcomes.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/codi.70509","type":"journal-article","created":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T08:01:17Z","timestamp":1780387277000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Risk of re\u2010operation after Bascom I for pilonidal sinus disease. A Danish population\u2010based cohort study"],"prefix":"10.1111","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9760-5345","authenticated-orcid":false,"given":"Ida Kaad","family":"Faurschou","sequence":"first","affiliation":[{"name":"U\u2010COPE (University Clinic of Coloproctology and Endoscopy) Randers Regional Hospital and Aarhus University  Randers Denmark"},{"name":"Department of Clinical Epidemiology Aarhus University Hospital and Aarhus University  Aarhus Denmark"},{"name":"Department of Clinical Medicine Aarhus University  Aarhus Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rune","family":"Erichsen","sequence":"additional","affiliation":[{"name":"U\u2010COPE (University Clinic of Coloproctology and Endoscopy) Randers Regional Hospital and Aarhus University  Randers Denmark"},{"name":"Department of Clinical Medicine Aarhus University  Aarhus Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Susanne","family":"Haas","sequence":"additional","affiliation":[{"name":"U\u2010COPE (University Clinic of Coloproctology and Endoscopy) Randers Regional Hospital and Aarhus University  Randers Denmark"},{"name":"Department of Clinical Medicine Aarhus University  Aarhus Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,6,2]]},"reference":[{"key":"e_1_2_11_2_1","first-page":"567","article-title":"Pilonidal disease: origin from follicles of hairs and results of follicle removal as treatment","volume":"87","author":"Bascom J","year":"1980","journal-title":"Surgery"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1445-2197.1992.tb07208.x"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/codi.17227"},{"key":"e_1_2_11_5_1","first-page":"32","article-title":"Patient impact of pilonidal sinus disease","volume":"7","author":"Korsgaard PD","year":"2021","journal-title":"Pilonidal Sinus J"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1093\/bjs\/znae237"},{"key":"e_1_2_11_7_1","first-page":"599","article-title":"German National Guideline on the management of pilonidal disease: update 2020","volume":"406","author":"Iesalnieks I","year":"2020","journal-title":"Langenbeck's Arch Surg"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.1093\/bjs\/znae281"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/codi.16696"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/codi.17217"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-018-20143-4"},{"key":"e_1_2_11_12_1","doi-asserted-by":"publisher","DOI":"10.1515\/iss-2021-0041"},{"key":"e_1_2_11_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF02554755"},{"key":"e_1_2_11_14_1","first-page":"A4348","article-title":"Short convalescence and minimal pain after out\u2010patient Bascom's pit\u2010pick operation","volume":"58","author":"Colov EP","year":"2011","journal-title":"Dan Med Bull"},{"key":"e_1_2_11_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.heliyon.2024.e31497"},{"key":"e_1_2_11_16_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2168.2000.01472.x"},{"key":"e_1_2_11_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.amjsurg.2008.01.020"},{"key":"e_1_2_11_18_1","doi-asserted-by":"publisher","DOI":"10.1111\/codi.16383"},{"key":"e_1_2_11_19_1","unstructured":"Statistics Denmark.Population figures.2024Available from:https:\/\/www.dst.dk\/en\/statistik\/emner\/borgere\/befolkning\/befolkningstal"},{"key":"e_1_2_11_20_1","doi-asserted-by":"publisher","DOI":"10.2147\/CLEP.S179083"},{"key":"e_1_2_11_21_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10654-014-9930-3"},{"key":"e_1_2_11_22_1","doi-asserted-by":"publisher","DOI":"10.2147\/CLEP.S91125"},{"key":"e_1_2_11_23_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.287.5462.2398"},{"key":"e_1_2_11_24_1","unstructured":"Standard Country or Area Codes for Statistical Use (M49 standard). 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