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However, historical data suggests that most patients undergoing the initial index biopsy procedure do not proceed to definitive implantation. Although various predictors for conversion have been proposed, including body mass index, lesion size, defect grade, and surgical history, significant discrepancies persist across the literature. Accurately predicting which patients will convert is critical for 2 primary reasons: first, to minimize unnecessary iatrogenic cartilage damage from nonused biopsies, and second, to mitigate health care waste and optimize resource allocation. Currently, precisely identifying the patient cohorts most likely to undergo implantation remains a clinical challenge, underscoring the need for large\u2010scale consensus data to guide patient counseling and surgical decision\u2010making.<\/jats:p>","DOI":"10.1002\/arj.70501","type":"journal-article","created":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T01:56:37Z","timestamp":1788141397000},"page":"2672-2673","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["<i>Editorial Commentary<\/i>\n                    : Chekhov's Unloaded Gun\u2014The Fate of a Knee Cartilage Biopsy Taken in the First Act"],"prefix":"10.1002","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-7315-7670","authenticated-orcid":false,"given":"Tzadok","family":"Yona","sequence":"first","affiliation":[{"name":"Gray Faculty of Medical &amp; Health Sciences Tel\u2010Aviv University  Tel Aviv Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9283-1439","authenticated-orcid":false,"given":"Ron","family":"Gilat","sequence":"additional","affiliation":[{"name":"Gray Faculty of Medical &amp; Health Sciences Tel\u2010Aviv University  Tel Aviv Israel"},{"name":"Sports Injuries Division and Joint Preservation Center Tel Aviv Medical Center  Tel Aviv Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,30]]},"reference":[{"key":"e_1_2_3_2_1","volume-title":"Chekhov's gun","author":"Encyclop\u00e6dia Britannica","year":"2022"},{"key":"e_1_2_3_3_1","first-page":"2661","article-title":"Approximately 30% of patients undergoing knee cartilage biopsy subsequently undergo matrix\u2010induced autologous chondrocyte implantation at a mean 4.3\u2010year follow\u2010up","volume":"42","author":"Kang LS","year":"2026","journal-title":"Arthroscopy."},{"key":"e_1_2_3_4_1","doi-asserted-by":"publisher","DOI":"10.1177\/23259671251415555"},{"key":"e_1_2_3_5_1","doi-asserted-by":"publisher","DOI":"10.1177\/23259671231160732"},{"key":"e_1_2_3_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2024.04.006"},{"key":"e_1_2_3_7_1","doi-asserted-by":"publisher","DOI":"10.1177\/23259671241271705"},{"key":"e_1_2_3_8_1","doi-asserted-by":"publisher","DOI":"10.1177\/19476035261428834"},{"key":"e_1_2_3_9_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546519834557"},{"key":"e_1_2_3_10_1","first-page":"514","article-title":"Of the structure and diseases of articulating cartilages, by William Hunter, surgeon","volume":"42","author":"Hunter W","year":"1742","journal-title":"Philos Trans 1683\u20101775"}],"container-title":["Arthroscopy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/arj.70501","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/arj.70501","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/arj.70501","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T08:26:22Z","timestamp":1793262382000},"score":1,"resource":{"primary":{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/10.1002\/arj.70501"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,30]]},"references-count":9,"journal-issue":{"issue":"11","published-print":{"date-parts":[[2026,11]]}},"alternative-id":["10.1002\/arj.70501"],"URL":"https:\/\/doi.org\/10.1002\/arj.70501","archive":["Portico"],"relation":{},"ISSN":["0749-8063","1526-3231"],"issn-type":[{"value":"0749-8063","type":"print"},{"value":"1526-3231","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,30]]},"assertion":[{"value":"2026-08-30","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}