Seborrhoeic dermatitis-like manifestation of lung cancer evolving into erythrodermia

Erythroderma as a paraneoplastic manifestation of small cell lung cancer

Erythroderma is a rare clinical entity characterized by generalized erythema affecting the whole or most of the body's skin surface. It is associated with a variety of underlying conditions, including preexisting dermatoses, infections, connective tissue disorders, drugs, malignancies, or it may be idiopathic. A case of a 73-year-old man, with a 5-month history of erythroderma, eventually diagnosed with small cell lung cancer is presented. This is the first reported case indicating an association between erythroderma and small cell lung cancer, extending, thus, current knowledge regarding small cell lung cancer-related paraneoplastic manifestations as well as erythroderma's causative factors.

Refractory seborrheic dermatitis of the head in a patient with malignant lymphoma

Seborrheic dermatitis is an inflammatory eruption that tends to distribute on the sebaceous areas of the body and is rarely described as a paraneoplasia. Here we report a case with a responsive seborrheic dermatitis-like eruption of the head which resulted in generalized erythroderma. Intensive examinations detected concurrent malignant lymphoma.

Eccrine porocarcinoma: a case with an obscure primary tumor diagnosed from lymph node metastasis

Eccrine porocarcinoma (EPC), a rare malignant epidermal appendage tumor, is mainly seen in elderly patients. A long history is one of its main characteristics. Two types of EPC are known: juxtaepidermal and dermal. The juxtaepidermal type usually has a more aggressive behavior. Lymph node metastasis and high mitotic activity are associated with poor prognosis. A case of EPC with a long-standing but indolent primary site diagnosed from lymph node metastasis is presented here. There was also accompanying chronic dermatitis as a paraneoplastic syndrome. Diagnosing EPC prior to the regional lymph node involvement is the most valuable factor for a successful treatment. Persistent examinations and attempts to find the primary site(s) have to be made in such cases.