Self-healing papular mucinosis in an adult.

Papular mucinosis is a rare, idiopathic cutaneous mucinosis that is typically chronic and progressively severe. We present a case of a 59-year-old woman with a 6-month history of a dramatic papular eruption on her face and neck, with no associated internal organ involvement. A biopsy specimen demonstrated increased dermal mucin with associated plump fibroblasts, consistent with a diagnosis of papular mucinosis.

Multiply recurrent trichilemmal carcinoma with perineural invasion and cytokeratin 17 positivity.

Background: Trichilemmal carcinoma is an uncommon cutaneous malignancy that is thought to be the malignant counterpart of the trichilemmoma. Despite histologic features such as pronounced cytologic atypia, trichilemmal carcinoma is often described as having a rather benign clinical course. Cases of tumor recurrence after therapy are uncommon, and tumor neurotropism has never been described.

Papular dermatitis and a persistent patch test reaction to gold sodium thiosulfate.

The role of gold in allergic contact dermatitis is poorly understood and is a subject of increasing interest. Recent studies demonstrate that gold-positive patch testing is not uncommon, but persistent patch test reactions are rarely reported. We present a case of a 53-year-old woman with a 7-year history of a scattered, pruritic papular dermatitis.