Sarcoidosis simulating metastasis in patient with Merkel cell carcinoma / Sarcoidose simulando metástase em paciente com carcinoma de células de Merkel

Merkel cell carcinoma (MCC) is a rare and aggressive skin neuroendocrine tumor whose etiology remains little known. The immune system dysfunction is considered one of the possible causes, shared with other diseases, like sarcoidosis. This article presents the case of a male patient, in the seventh decade of life, which had a prior MCC diagnosis and was subsequently diagnosed with sarcoidosis, which radiologically simulated lung and mediastinum metastasis. The association between MCC and sarcoidosis is infrequent and rarely described in literature, found in only two case reports.

O carcinoma de células de Merkel (CCM) é um tumor neuroendócrino de pele, raro e agressivo, cuja etiologia permanece pouco compreendida. Disfunção do sistema imune é apontada como um possível fator causal, tanto para o CCM quanto para a sarcoidose. Este artigo descreve o caso de um paciente do sexo masculino, na sétima década de vida, com diagnóstico de CCM, posteriormente diagnosticado com sarcoidose, que, à radiologia, simulava metástase para pulmão e mediastino. A associação entre CCM e sarcoidose é rara e muito pouco descrita na literatura, encontrada em apenas dois relatos de casos.

Penile metastasis of urothelial carcinoma diagnosed by fine-needle aspiration.

Penile neoplasms are rare and can be primary or represent metastasis or local recurrence. The most common primary cancer of the penis is squamous cell carcinoma, accounting for 95% of all cancers. In spite of the rich vascularity of the organ, penile metastases are uncommon. Cutaneous metastasis of urothelial carcinoma (UC) is extremely rare and generally accepted as the late manifestation of a systemic spread. By 1998, approximately 500 cases of penile metastasis had been reported worldwide. However, only few case reports and series of fine-needle aspiration cytology (FNAC) of penile tumors have been documented. We report a case of penile metastasis from UC diagnosed by FNAC and describe the cytomorphological findings with an emphasis on cercariform cells. Although not commonly used, FNA of penile nodules can be effective in diagnosing recurrence or metastasis and avoiding surgical procedures, thus being an excellent initial procedure in the diagnostic approach.