Malignant chondroid syringoma of thigh with late metastasis to lung: A very rare case report.

Mixed/biphasic tumors include epithelial-myoepithelial tumors, pleomorphic adenoma, matrix-producing tumors, cutaneous mixed tumors such as chondroid syringoma (CS), malignant mixed tumors (carcinosarcomas), pulmonary blastomas (in lung), and many others. Morphology may show overlap between various mixed tumors. At any particular site, whether these tumors are primary or metastasis from other sites is difficult to determine, more so if primary is unknown or not disclosed. CS is a rare benign mixed/biphasic skin adnexal tumor, considered as cutaneous counterpart of pleomorphic adenoma. Its malignant variant, malignant CS is reported only occasionally. We describe a case of a 51 year old female who presented with multiple masses in both lungs. This case is a very rare example of late metastasis to lungs from a primary malignant CS of thigh.