Cribriform-morular variant of papillary thyroid carcinoma: a study of 3 cases featuring the PIK3CA mutation

The cribriform-morular variant of papillary thyroid carcinoma (CMV-PTC) is an unusual neoplasm with a considerably important association with familial adenomatous polyposis in young women, characterized by a peculiar histologic morphology with mixed cribriform, papillary, solid, tall columnar, and morular patterns. However, it can also occur sporadically. The molecular pathogenesis of sporadic CMV-PTC is not completely understood. We report...