Cystic lymphangioma is an uncommon congenital benign neoplasm, which frequently occurs to children and young adults and acquired form may be detected in middle-aged adults. Cystic lymphangioma usually appears in the neck, the axillary region, and the mediastinum. In the first case, cystic lymphangioma located in the posterior mediastinum extending over the vertebral column to the both hemi ... [Show full abstract] thoraces. In the second one, it was palpated on the posterior chest wall at the level of T6-8 vertebrae. In the view of literature, these cystic lymphangioma are accepted to be atypical because of their locations.