Lymphangioma is a rare pathology in children and even more exotic when encountered in adults. We review the current data on this subject underlining possible controversies and limitations. This is the case of an adult male who underwent a complete clinical examination and ENT performed ultrasound exam, along with contrast CT prior to complete surgical removal of the mass. The mass was 6 cm in diameter and compressed the left lobe of the thyroid gland. Pathology result confirmed the diagnosis of lymphagioma.