Fig. 2From: Squamous cell carcinoma arising from chronic sacrococcygeal pilonidal disease: a case reportHistopathological findings. a Squamous cell carcinoma invading the wall of the large bowel (H&E ×100). b Invasion of the dermis by the neoplasm, which shows keratinization in this area (H&E ×40). c Area of bone invasion by the neoplasm (H&E ×100). d Poorly differentiated area of the neoplasm invading muscle (H&E ×100)Back to article page