14 September 2025
: Case report 
Management of Complex Anal Fistula in Recurrent Perianal Abscess: A Case Report
Unusual clinical course, Challenging differential diagnosis, Unusual or unexpected effect of treatment, Diagnostic / therapeutic accidents
Mingzi Zhang BEF 1, Wei Wang B 2, Yijun Xia BC 1, Huaqing Zhang CD 3, Yue Du CD 4, Zhi Wang AD 1*, Xiao Long AD 1DOI: 10.12659/AJCR.948682
Am J Case Rep 2025; 26:e948682
Figure 3 (A) Clinical wound appearance before the second surgery: A sinus tract measuring approximately 7 cm in depth was identified; (B) Preoperative sinus tract radiography: Sinus tract radiography showing non-communication with the anal canal; (C) Clinical wound appearance during the second surgery: necrotic tissue was evacuated; (D) Intraoperative methylene blue test during the second surgery: methylene blue was injected through the wound site, with no drainage observed from the anus.