Telangiectasia macularis eruptiva perstans.

We present a 31-year-old woman with a ten-year history of a progressive macular eruption; one of her macules demonstrated a wheal when rubbed. A biopsy was consistent with telangiectasia macularis eruptiva perstans. There were no signs and symptoms of systemic involvement despite the large body surface area of involvement.

Erythroderma of unknown etiology.

We present a 46-year-old man with a greater than 15-year history of erythroderma. A definitive diagnosis has not been established. The differential diagnosis is discussed.

Mycosis fungoides stage IB progressing to cutaneous tumors.

A 44-year-old African American woman presented with well-demarcated, pruritic and intermittently painful plaques and subsequently a diagnosis of mycosis fungoides stage IB was made. Six months after diagnosis, cutaneous tumors developed despite treatment with narrow-band ultraviolet B phototherapy. The patient failed low-dose methotrexate treatment and is now slowly improving on combination therapy with subcutaneous interferon alfa and oral bexarotene.

Behçet syndrome.

We present a 34-year-old man with a two-year history of aphthous stomatitis, who later developed painful, erythematous nodules on his lower extremities. A pathergy test was positive, and the diagnosis of Behçet syndrome (BS) was made. It is important for the dermatologist to recognize the wide variety of cutaneous manifestations of this disorder.

Neurovascular hamartoma.

A 29-year-old man presented with a large, asymptomatic, brown, hyperpigmented, depressed plaque over his left upper back, which included the scapular area, since childhood. Histopathological analyses of the biopsy specimens was consistent with a rare entity known as neurovascular hamartoma. This uncommon lesion has been reported in two publications, either as a possible marker of the malignant rhabdoid tumor or as a hamartomatous tongue lesion in children.