Liver metastases from maxillary sinus sinonasal undifferentiated carcinoma: a case report
Sinonasal undifferentiated carcinoma (SNUC) is a rare malignancy arising from the nasal cavity with neuroendocrine differentiation and aggressive behavior. When first diagnosed, SNUC is often locally advanced with nodal and distant metastases. The present study indicates a rare case of sole metastases to the liver from maxillary sinus undifferentiated carcinoma. Diagnosis was confirmed by total body computed tomography and immunohistochemical analysis on tissues from both maxillary and liver neoplastic tissues. SNUC is an aggressive malignancy characterized by a poor prognosis.