Lymphangiomas are congenital malformations with benign character, affecting the lymphatic channels and generally observed in ages below two years. They most frequently originate from the head and neck region. Although occurrence in adults is rare, it should be considered in the differential diagnosis of cervical masses. Diagnosis is established through anamnesis, physical examination findings and imaging methods. The preferred treatment method is surgery. In this article, we present a 27-year-old male patient with 13.2¥7.6¥13 cm sized mass localized in left cervical region that has been continuing to grow despite being excised before. Ultrasonography and magnetic resonance imaging findings of the mass were compatible with cystic lymphangioma. Therefore, the mass was totally excised. Histopathologic examination was compatible with cystic lymphangioma. No complication was observed in the period after surgery and no recurrence developed during the one-year follow-up.