The purpose of this study was to determine the course of cutaneous immature angiomas in a population of 362 children examined in a pediatric dermatology unit from 1975 to 1982. 461 angiomas were observed in these patients: 110 were of the naevus flammaeus type (port wine stain) including 23 forehead salmon patches. 351 were immature angiomas (IA)--strawberry angiomas. 3.5 p. 100 of children were afflicted of two types of hemangiomas. Results concerning the 282 patients with 351 IA are detailed as followed: average follow-up: 2 years; sex-ratio M/S 1.9, most of them Caucasians. Prematurity (data obtained prospectively during 1982): 19 p. 100; clinical features: dermal: 253, subcutaneous: 35, mixed pattern 63; 2 IA or more were detected in 12 p. 100 of the patients; site: head and neck; 49 p. 100, trunk: 21 p. 100, upper limbs: 14.5 lower limbs: 12 p. 100, genitals 3.5 p. 100; maximal size during follow-up: less than 1 cm: 36 p. 100, between 1 and 3 cm: 43 p. 100, more than 3 cm; 21 p. 100; time of onset: 51 p. 100 were noted at birth, 35 p. 100 during the first month, 13 p. 100 after the first month. Course of untreated IA is shown in figure 1. At the end of follow-up, spontaneous evolution in 52 patients was judged; very good in 44 p. 100, good in 41 p. 100, poor or bad in 15 p. 100. Minor complications (ulceration, infection, bleeding) were observed in 12.8 p. 100. Functional impairment requiring therapy was present in 2/4 plantar IA, 3/30 eyelid IA, 3/3 IA with laryngeal involvement.(ABSTRACT TRUNCATED AT 250 WORDS)