Lymphangiomas are congenital benign lesions commonly seen in pediatric age group with a rare occurrence in the region of head and neck, commonly presenting as asymptomatic masses. Cervical lymphangioma is a rare entity among adults, and giant sized lymphangiomas in this region have sparse mention in literature. This case report describes the rare presentation of a giant cervical lymphangioma and the challenges involved to treat such masses in the region of head and neck. We encountered a rare case of a 52 year old female who presented with a 10 × 5cm swelling in the right posterior triangle of neck swelling since 6 months extending from skull base up till clavicle. Pathological and radiological entities confirmed the lesion as a "giant cervical lymphangioma". Head and neck lymphangiomas are congenital lesions of benign origin. Lymphangiomas have been classified as macrocystic if larger than 2cm, and microcystic if less than 2cm. Our description of a macrocystic 10 × 6 cm lesion is hence definitely one of the largest cervical lymphangiomas encountered till date. It's a problematic and arduous plan of treatment for such masses in head and neck with a high chance of recurrence if incompletely removed.