Delayed diagnosis of primary non-Hodgkin's lymphoma of the sacrum

Primary non-Hodgkin's lymphoma of hone is a rare, malignant hematologic tum or affecting most commonly persons in the fourth decade of life. The tumor produces predominantly osteolytic lesions usually in the femur and pelvic b ones and, very rarely, may present with spinal epidural involvement. The au thors discuss an interesting case of primary non-Hodgkin's lymphoma of bone involving The sacrum with epidural invasion, in which the atypical imaging findings along with negative biopsy results delayed diagnosis. (C) 2000 El sevier Science Inc. All rights reserved.