BACKGROUND: Intracytoplasmic lumina (ICL) have been observed frequently in @entity0 cells. However, they are extremely rare in @entity259 . We encountered a @entity189 of the thyroid (MCT) with ICL and present a case with cytologic, immunocytochemical and ultrastructural features. CASE: A 15-year-old female was admitted with a left thyroid mass. Ultrasound examination revealed a well-defined @entity5 in the left lobe of the thyroid. Fine needle aspiration cytology showed mainly dispersed spindle cells with oval nuclei and some @entity5 cells. The @entity5 cells containing ICL were noted at high magnification. The ICL contained sparse microvilli and abundant granular material with dense, round bodies on ultrastructural sections. Immunocytochemically, these @entity5 cells were positive for @entity175 and @entity787 ( @entity787 ). Moreover, @entity787 was recognized in the ICL with immunocytochemical staining. All @entity5 cells were negative for thyroglobulin. Pathologic examination confirmed the diagnosis of @entity189 of the @entity1374 . CONCLUSION: MCT can include ICL with granular material containing @entity787 .

Intracytoplasmic lumina in XXXX of the @entity1374 . Report of a case with cytologic and immunocytochemical features.

@entity175 :: ('MESH:D002116', 'Chemical') :: ['calcitonin'] @entity0 :: ('MESH:D001943', 'Disease') :: ['breast carcinoma'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'polymorphic or triangular tumor'] @entity189 :: ('MESH:D002277', 'Disease') :: ['medullary carcinoma'] @entity787 :: ('1084', 'Gene') :: ['CEA', 'carcinoembryonic antigen'] @entity259 :: ('MESH:D013964', 'Disease') :: ['thyroid gland tumors'] @entity1374 :: ('MESH:D013959', 'Disease') :: ['thyroid gland']
@entity189 :: (MESH:D002277,Disease) :: ['medullary carcinoma']
