This example of thymic carcinoid shows a spindle cell pattern. Thymic carcinoids are malignant tumors that can invade locally and show distant metastases. They can occur as a component of multiple endocrine neoplasia type I or IIa syndromes. The main distinguishing features from thymoma are : lack of lobulated architecture of thymoma; high vascularity; lack of lymphocytes and perivascular spaces of thymoma.
return to Neuroendocrine Tumors of the Mediastinum