680 DISEASES/DISORDERS
Sebaceous gland tumors:
Prognosis is good
Malignant form (adenocarcinoma) rarely metastasizes and is locally infiltrative
involving regional lymph nodes.
Hair follicle tumors:
Prognosis is good; surgical or laser excision is curative
Rare report of metastatic pilomatrixoma with neurologic complications.
Fig. 46.1.Multiple hyperpigmented plaques with areas of ulceration on an extremity with Bowen’s disease
caused by papillomavirus in a 12-year-old female-spayed sphynx.
Fig. 46.2.Squamous cell carcinomain situof Bowen’s disease on the tarsus of a 19-year-old male-castrate
DSH.