Case for diagnosis.
An 80-year-old Caucasian male patient was referred for evaluation of a rapidly growing, asymptomatic, erythematous nodule measuring 2 cm in diameter on his left cheek. The lesion had been present for four months. Dermoscopy revealed a homogeneous pink background with polymorphous telangiectatic vessels. Histopathology showed tumors in the deep dermis and subcutis composed of round cells with scant cytoplasm. Immunohistochemical staining was positive for CK20 confirming the diagnosis of Merkel cell carcinoma.
Medical School, Federal University of Minas Gerais, Belo Horizonte, Brazil. bernardogontijo@terra.com.br
Bernardo
B
Gontijo
Thaíssa Oliveira de Almeida
TO
Coelho
Flávia Vasques
FV
Bittencourt
Glaysson Tassara
GT
Tavares
Angélica Duarte Oliveira
AD
Rocha
D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis; D015266:Carcinoma, Merkel Cell / Q000473:pathology*; D002610:Cheek; D005153:Facial Neoplasms / Q000473:pathology*; D006801:Humans; D053554:Keratin-20 / Q000032:analysis; D008297:Male; D012878:Skin Neoplasms / Q000473:pathology*
D014408:Biomarkers, Tumor; D053554:Keratin-20