Incidental Detection of Abdominal Aortic Aneurysm on Skeletal Scintigraphy

摘要

Extra osseous abnormalities detected incidentally on skeletal scintigraphy are not uncommon and include soft tissue tumors, infections, haematomas and calcification. Abnormal uptake may also indicate vascular pathology such as aneurysm. We describe two cases of incidental detection of abdominal aortic aneurysms in both the early and delayed phases of bone scans, and subsequent confirmation with radiological imaging. Case 1 A 76-year-old man had a bone scan to investigate his right sided low back pain radiating into the leg. Degenerative arthritis in the lumbar spine on the right side at L3/4 level was demonstrated on bone scintigraphy. A large rounded hypervascular lesion was visible inferior to the left kidney on the early blood pool phase of the study. Subsequent abdominal ultrasound and computed tomographic (CT) imaging revealed a 8.7 x 8.1 cm saccular infrarenal abdominal aortic aneurysm.