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. 2024 Aug 30;2024(8):rjae539.
doi: 10.1093/jscr/rjae539. eCollection 2024 Aug.

Misdiagnosed as a perianal abscess: case report of perianal endometriosis

Xuejiao Ding  1 , Yichao Tao  1 , Cong Hu  1 , Xiaofeng Wu  1
Affiliations

Misdiagnosed as a perianal abscess: case report of perianal endometriosis

Xuejiao Ding et al. J Surg Case Rep. .

Abstract

Perianal endometriosis represents a rare form of endometriosis occurring outside the pelvic cavity. Owing to its infrequency in clinical practice, this condition is highly susceptible to misdiagnosis and inappropriate treatment. This case report details a young female patient who was erroneously diagnosed with a perianal abscess. We conducted a para-anal mass resection under spinal anesthesia, and subsequent histopathological examination definitively confirmed the diagnosis of perianal endometriosis.

Keywords: perianal abscess; perianal endometriosis; ultrasound.

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Conflict of interest statement

The authors declare that there are no conflicts of interest.

Figures

Figure 1
Figure 1
Ultrasound: (A) 2D ultrasound shows a mixed echo with a range of about 4 cm in the subcutaneous soft tissue around the left side of the anus, presenting as cystic-solid; (B) color doppler shows a small amount of punctate blood flow signal inside and around the mixed echo.
Figure 2
Figure 2
MRI: (A, B) A cluster of low/high mixed signals such as T1 and T2 can be seen on the left side of the anus, and the DWI signal is partially increased.
Figure 3
Figure 3
Postoperative pathology: the endometrial glands have typical stroma, blood, and macrophages containing hemosiderin.
See this image and copyright information in PMC

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