One Case of Reactive Perforating Collagenosis / 대한피부과학회지

ABSTRACT

Authers observed one case of typical reactive perforating collagenosis (RPC) which did not seem to have been described in the Korean literature. A 19 year old male patient complained of a skin eruption involving his face, upper and lower extremities, and trunk in June 1973. The skin eruption appeared at the age of 10 and consisted of discrete papules of which the earliest lesion was a pinhead-sized, skin-colord papule, but it became older, it increased in size and developed a small central area of umbilication containing keratinous material. As new papules continued to develop, the older lesions regressed and disappeared with residual scar. No subjective symptom was obtained except intermittent, mild itching sensation which probably due to a irritation. The Keobner's phenomenon was observed on the dorsum of hands. He has acne vulgaris on the face with many of the individual comedones showing development into RPC. He also had a chronic maxillary sinusitis which was seemed to aggravate the skin eruption. In follow up period (about 5 months), the sinusitis was cured with operation, but the skin eruption was not improved. The family history was negative. Histopathological studies revealed typical RPC, i.e., a cup-shaped epidermal depression of which center was lacked the epidermis was noted, and through it, necrobiotic connective tissue, degenerating inflammatory- cells and collagen bundles are extruded to form a plug. Diagnosis was confirmed by clinical appearance and typical histopathologic features. The patient did not responed to topical application of 0. 1% Retinoic acid solution and Vitamin A and D.