Basal‐Cell Carcinomas on Covered or Unusual Sites of the Body

Abstract

Basal-cell carcinomas on covered, anatomically shielded, or otherwise unusual sites of the body are rare compared to the number on constantly exposed parts of the body, but since basal-cell carcinomas are so common, instances of the former sort are not infrequently encountered. Five such cases are described and illustrated.

Perianal Basal Cell Carcinoma

“…1,2 Lesions occurring in the perianal region represent an even more rare disease, accounting for 0.2% of the anorectal tumors, with only a few case reports and small series presented in the literature. 3,4 Patients usually have a slow-growing perianal mass ranging from 1 to 10 cm in size and with central ulceration and raised edges.…”

Periungual basal cell carcinoma: A case report with review of literature

“…Male: female ratio was 1.8:1. The thumb was the most frequently affected site[568912131519242628] and the hallux was reported in five cases. [1118212227] The right middle finger was involved in three cases[41620] and both hands were affected with almost similar frequency.…”

Primary Malignant Tumors of the Nail Unit

“…First, the nail unit may be the most unusual location on the human body for basal cell carcinomas. 20 Slightly more cases in males have been reported than in females (10: 6). The thumb is the most common location (6 cases), followed by the hallux (3 cases).…”

“…10,11 BASAL CELL CARCINOMA Basal cell carcinoma of the nail unit is an exceedingly uncommon tumor. There are only 16 cases reported in the literature, [12][13][14][15][16][17][18][19][20][21][22][23][24] and while such a limited number limits any generalizations, certain patterns have been demonstrated. First, the nail unit may be the most unusual location on the human body for basal cell carcinomas.…”