The variety of diseases caused by mutations in RET receptor tyrosine kinase provides a
classic example of phenotypic heterogeneity. Gain-of-function mutations of RET are …

We report the simultaneous occurrence of medullary thyroid carcinoma (MTC) and papillary
thyroid carcinoma (PTC), presenting as spatially distinct and well-defined tumour …

Objectives The simultaneous occurrence of medullary thyroid carcinoma (MTC) and
papillary thyroid carcinoma (PTC) in the same thyroid gland is documented. In this study, we …

Gain‐of‐function mutations within the receptor tyrosine kinase gene RET cause inherited
and non‐inherited thyroid cancer. Somatic gene rearrangements of RET have been found in …

Background Collision tumors of the thyroid are a rare pathology that present a diagnostic
and treatment challenge. In this report, we present an interesting case and a review of the …

Spindle cell lesions of the thyroid gland (T-SCL) are not encountered routinely in clinical
practice or in the context of thyroid pathology. They commonly are classified as primary or …

Background: The routine measurement of serum calcitonin (CT) has been proposed for
patients with nodular thyroid disease (NTD), to detect unsuspected medullary thyroid …

Background Papillary (PTC) and medullary (MTC) thyroid carcinomas represent two distinct
entities, but quite frequently, they may occur simultaneously. Aim To provide genetic …

Collision tumor is the occurrence of two histologically and morphologically distinct tumors
within the same organ with no histological admixture. Collision tumors of the thyroid are …

Introduction Papillary thyroid carcinoma and medullary thyroid carcinoma are two different
thyroid neoplasia. The simultaneous occurrence of medullary thyroid carcinoma and …