Secondary Cutaneous Mantle Cell Lymphoma.

Mantle cell lymphoma is a rare form of B-cell non-Hodgkin's lymphoma that presents as a low-grade lymphoma and has a different prognosis than other types of lymphoma. Mantle cell lymphoma is an aggressive tumor that can manifest as nonspecific symptoms, such as nasal obstruction, dyspnea, and erythematous indurated cutaneous plaques. Diagnosis can be established with confidence using immunohistochemistry. In this report, a case of nasopharyngeal mantle cell lymphoma metastasizing to the skin is discussed.