Introduction

Co existence of two or more independent, histologically distinct tumors separated by non neoplastic stroma in the same organ is collision tumor. It is different from composite tumors, which are composed of different tumor in close proximity with histologic intermingling of tumor cells. collision tumors within thyroid are rare.

1. Brandwein-Gensler M, Urken M, Wang B (2004) Collision tumor of the thyroid: a case report of metastatic liposarcoma plus papillary carcinoma. Head Neck 26:637-641
2. Baloch ZW, Mandel S, LiVolsi VA. Combined tall cell carcinoma and hurthle cell carcinoma of the thyroid . Arch Pathol Lab Med 2001;125:541-3
3. Rossi S, Fugazzola L, De Pasquale L (2005) Medullary and Papillary carcinoma of the thyroid gland occurring as a collision tumor. Endocr Relat Cancer 12: 281-289
4. Ryan N,Walkden G, Lazic D, Tierney P. Collision tumor of the hyroid: Acase report nad review of literature. Head Neck 2015;37:E125-9

Khethmal P

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