Adnexal tumors

Abstract

The chapter summarizes important clinical and histological findings of cutaneous skin adnexal tumors. Thus, a well-trained clinician is able to diagnose some cutaneous adnexal tumors on the basis of clinical findings or at least is able to give a spectrum of relevant differential diagnosis. Depending on the morphological differentiation, a distinction is made between follicular tumors containing structures of the hair follicle, sweat gland tumors with eccrine or apocrine differentiation, and sebaceous skin tumors. In addition to benign tumors, the morphological criteria for malignant skin adnexal tumors are described. With regard to the different growth patterns and the biological behavior, we give important recommendations for biopsy technique and subsequent surgical treatment.