Squamous cell carcinoma of the nail bed in three related giant schnauzers.

Three black giant schnauzers, mother, daughter and son, developed single or multiple primary squamous cell carcinomas of the nail bed between the ages of nine and 12 years. The clinicopathological findings are described. Radiographic evidence of osteolysis of the third phalanx, especially in a middle-aged to older large-breed, black dog would warrant the amputation and histopathological examination of the digit because of the likelihood of squamous cell carcinomas.