PILONIDAL SINUS AT UNCOMMON LOCATIONS: A FOUR-CASE SERIES ameralqadi2002@yahoo.com

PE013

PILONIDAL SINUS AT UNCOMMON LOCATIONS: A FOUR-CASE SERIES

2

United Arab Emirates

Oral or Poster

Pilonidal sinus (PNS) is a chronic inflammatory disorder of subcutaneous tissue, classically occurring in the sacrococcygeal region of young adults. Although uncommon, ectopic PNS can arise at non‑sacrococcygeal sites and is frequently misdiagnosed as abscesses, sebaceous/epidermoid cysts, or fistulas. Recognizing these atypical presentations is essential to avoid delayed treatment. This case series describes clinical features, management, and outcomes of four patients with PNS at unusual anatomical locations.

Four consecutive patients (three males, one female; age range 19–40 years) with clinically suspected ectopic PNS were included. All presented with localized pain and purulent discharge; one had recurrent disease. Diagnosis was confirmed intraoperatively by identification of hair‑containing sinus tracts with granulation tissue and by histopathology. Surgical management comprised excision with primary closure in three cases and incision with sinus curettage in one. Patients were followed for three months postoperatively.

Complete healing was achieved in all four cases without intraoperative or postoperative complications. No recurrences were observed during the three‑month follow‑up period.

PNS can present in atypical, non‑sacrococcygeal locations and mimic more common conditions, leading to diagnostic delay. A high index of suspicion, supported by intraoperative and histological confirmation, facilitates accurate diagnosis. Definitive surgical treatment with complete sinus excision yields favorable short‑term outcomes; longer follow‑up is warranted to assess durability.