The combination of two or more histologically distinct tumor components occurring at the same anatomic location is called a collision tumor and is a rare occurrence in the thyroid gland. Most often both the tumors are malignant and combinations of papillary-follicular carcinoma, papillary-medullary carcinoma are more common. Here, we report a rare collision tumor having Hurthle cell adenoma and papillary microcarcinoma as its components.
How to cite this article:
Amulya Ravi, Shailaja Prabhala and Ashok Kumar Deshpande. A rare phenomenon in thyroid neoplasms: Collision tumor. International Journal of Clinical and Diagnostic Pathology. 2019; 2(2): 364-366. DOI: 10.33545/pathol.2019.v2.i2f.130