A Case for Diagnosis (Radiodermatitis? Psoriasis? Dermatitis Venenata?). Presented by Dr. Howard Fox. Lichen Planus Annularis et Hypertrophicus in a Child. Presented by Dr. Maurice J. Costello. Melanoma. Presented by Dr. Eugene F. Traub. F. S., a girl aged 10, received an injection for whooping cough at the age of about 1 year. The mother stated that the needle punctured a pigmented nevus on the right arm. Shortly thereafter, the mother noticed a number of small coffee-colored pigmented areas that had appeared within a diameter of 2 to 3 inches (about 5 to 7.5 cm.) around the original site. Several of the pigmented areas became inflamed and slightly nodular. At the present time there is a group of variously sized pigmented lesions, some elevated and some flat, several of which have slightly red and inflamed areolas. None of the pigmented lesions measures more than 2 cm. in its greatest diameter.