A healthy 10-year-old boy was evaluated for a rapidly growing dark black lesion of 4 weeks duration. The growth was located 5 mm inferior to the left labial commissure (Fig. 1). The mother admitted probing the growth with a needle on the assumption that a foreign body was present. Review of systems was noncontributory. The family history was negative for atypical nevi, melanoma, actinic keratoses, and nonmelanoma skin cancer.Physical examination showed a healthy Caucasian boy. An oval-shaped, dark black, slightly depressed 5 · 6 mm papulonodule was noted; it was indurated to intra-extraoral palpation. Dimple sign was positive. He had no in-transit lesions or submandibular or cervical adenopathy. A 6 mm punch biopsy specimen was obtained (Figs. 2-4).A 1-day-old white infant girl was admitted to the neonatal inpatient unit of our hospital with skin lesions suspected clinically to be a herpes simplex infection. She had been delivered without complications (Initial Apgar score 8 ⁄ 10; birth weight 2340 g) after an uneventful pregnancy of 41 weeks. Her mother during the second month of pregnancy had oral lesions which had been diagnosed as aphthosis. The girl was the first child of nonconsanguineous parents. Physical examination revealed erythematous and desquamative plaques involving the seborrheic areas, in particular the scalp, eyelids, neck, axillary folds and upper middle part of the back (Fig. 1).After 4 days of intravenous aciclovir, ampicillin, and gentamicin, the skin lesions had become more vegetative, more erythematous and oozing and less desquamative. Some flaccid vesicles and pustules and some skin erosions were seen on the left axillary fold and on the right shoulder (Fig. 2). Mucous membranes and the remaining skin were not involved.Cytologic studies from a vesicle, performed at admission, were reported as showing nuclear changes that suggested viral infection but not being specific for herpetic infection. Further microbiologic cultures (bacteria, virus, and fungi) were negative.Examination of a skin biopsy specimen, taken from the back, demonstrated an epidermal pattern of eosinophilic spongiosis. Within the papillary dermis, edema and an inflammatory infiltrate composed of eosinophils and neutrophilis were appreciated (Fig. 3).A 10-month-old girl was brought to our hospital because of enlarged right labia minor, which had not changed since her mother first noticed the swelling 1 week earlier. Physical examination demonstrated that the right labia minor was enlarged to 14 · 7 mm (Fig. 1). The overlying skin was slightly yellow and shiny. On general physical examination, no palpable lymphadenopathy or hepatosplenomegaly was found. Results of laboratory studies including a complete blood count, urinalysis, serum cholesterol, and triglyceride levels were normal. She was followed for 2 months without medication, but the enlarged labia minor did not change significantly in this time. Reductive resection under general anesthesia was undertaken and the tissue sent for histologic analysis (Figs. 2, 3).