Diagnosis and treatment of bilateral primary branchiogenic carcinoma: A case of malignant transformation of branchial cleft cyst.

Branchial cleft cysts are common congenital lateral neck masses, with 95 % originating from the second branchial cleft. Although most cysts are benign, there are rare instances of malignancy. Here, we present a rare case of primary branchiogenic carcinoma originating from both sides of the neck in a 68-year-old male. Through a detailed analysis of this rare bilateral primary branchiogenic carcinoma, we present the complexity of diagnosing such rare phenomena and the limitations of existing diagnostic methods, emphasizing the need to improve diagnostic methods and the importance of further research for understanding and dealing with similar cases.