[Vascular nevi and tumors of the skin]

Diagnosis and classification of dysontogenetic and neoplastic lesions of blood- and lymph-vessels depend upon the presence or absence of proliferating vascular elements and of non-involutive connective tissue and muscular wall structures. Angiectatic and angiokeratotic nevi, capillary and cavernous angiomas, glomangiomas and malignant vascular tumors are presented in a survey with special reference to frequent diagnoses.