title: Basal cell carcinoma mimicking pilonidal sinus: A case report with literature review.
abstract: BACKGROUND
  Pilonidal sinus is a common benign disease that accounts for almost 15% of anal suppurations while basal cell carcinoma is the most common malignancy of the sun-exposed area occurring mainly on the head and neck. We report a case of basal cell carcinoma presented with signs and symptoms of PNS. A 40-year-old male presented with swelling of the lower back for 2 years. On examination, there was a round, mobile, soft 4×2.5cm mass on the sacrococcygeal area. Ultrasound showed subcutaneous cystic lesion. Clinical diagnosis of PNS was done and excisional biopsy was performed under local anesthesia. The result of the histopathological examination was suggestive for basal cell carcinoma.
  
  
  CONCLUSIONS
  Basal cell carcinoma should not be forgotten in differential diagnosis of superficial mass and abscesses.
authors.affiliation: Faculty of Medical Sciences, School of Medicine, Department Surgery, University of Sulaimani, François Mitterrand Street, Sulaymaniyah, Iraq.
authors.forename: Abdulwahid M
authors.initials: AM
authors.lastname: Salih
authors.affiliation: Faculty of Medical Sciences, School of Medicine, Department Cardiothoracic and Vascular Surgery, University of Sulaimani, François Mitterrand Street, Sulaymaniyah, Iraq. Electronic address: fahmi.hussein@univsul.edu.iq.
authors.forename: F H
authors.initials: FH
authors.lastname: Kakamad
authors.affiliation: Sulimani Teaching Hospital, Department of Pathology,, François Mitterrand Street, Sulaymaniyah, Iraq.
authors.forename: Goran M
authors.initials: GM
authors.lastname: Rauf
keywords: Abscesses; Case report; Palisades; Superficial mass