ABSTRACT
The following case report concerns a rare bone metastasis of malignant melanoma occurring in the 4th and 5th lumbar spines and adjacent iliac crests and sacrum. A 42-year-old woman was admitted with a 6 months history of severe lumbago ar right flank pain radiating to right lower extremity. Preoperative X-ray studies revealed stag horn stone in the right renal pelvis as spondylolisthesis of the 5th lumbar spine with bilateral isthmic defects. On physical examinations, dark brown colored nevus was noted at lower lumbar regio which was removed and subjected for biopsy. Surgical exploration demonstrated a melanoma metastasis to have invaded the spine process, lamina and transverse processes of the 5th lumbar spine, adjacent L4 and sacru and iliac crests. Surrounding soft tissues, however, were apparently normal. Postoperatively course of the patient seemed to follow a rapidly terminal clinical cours.