A 23-year-old Ethiopian new immigrant presented with a giant lymphangi
oma extending from the posterior mediastinum through the retroperitone
um, ending as a herniated fluid-filled sac in the inguinal region. Chy
lous fluid aspirated from within the lymphangioma was cultured positiv
e for Mycobacterium tuberculosis. Considerable regression occurred fol
lowing 6 months of antituberculous treatment.