CALB2 and lymphangioma: Lymphangioma is a benign hamartomatous tumor which is characterized by abnormal proliferation of lymphatic vessels that usually present as cystic masses, with hemangioma, cystic architecture, and lymphocyte aggregates similar to ATs, but lymphangioma shows absence of a solid pattern and is negative for epithelial markers, WT-1 and calretinin (41).