Abstract
Tc-99m MDP uptake into extraosseous malignant lesions with metastases to soft tissue has been well described. Tc-99m MDP uptake has been reported in primary lesions and usually in single metastatic sites including the regional lymph nodes, the abdomen, and especially the liver. In metastatic adenocarcinoma, previous studies showing extraosseous uptake have revealed histopathologically that calcification or ossification had occurred in the soft tissue. The authors report an unusual case of soft-tissue metastases in colonic adenocarcinoma that were detected on routine bone scintigraphy. The histopathologic findings did not reveal calcification, ossification, or necrosis.
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