Cervical Epidural Lipoblastomatosis: Changing MR Appearance after Chemotherapy

Summary: Lipoblastomatosis is a locally infiltrative tumor of embryonic fat. We describe the MR appearance of cer-vical lipoblastomatosis with epidural extension. The initial MR study showed features of a soft-tissue mass; a subse-quent MR examination, performed after chemotherapy, de-picted the lesion as a typical lipoma of high signal intensity on T1-weighted images and of intermediate signal on T2-weighted sequences. Lipoblastoma is a benign tumor of embryonic fat that occurs in infancy and childhood (1). It consti-tutes 3 % of tumors arising from fat cells in infants. The male:female ratio is 3:1 (2). Lipoblastomatosis is more uncommon and represents a diffuse locally infiltrative form of lipoblastoma (3). The tumor may have a rapid rate of growth (4). Rarely, a