Metastatic Giant Cell Tumor Causing Small Bowel Intussusception on 18F-FDG PET/CT

An 89-year-old man with a history of a malignant giant cell tumor of soft parts in the right thigh with recurrent/metastatic tumor in the right pelvis was found to have pulmonary nodules concerning for metastatic disease. Subsequent PET/CT unexpectedly demonstrated a right lower quadrant intussusception with a hypermetabolic mass serving as a lead point. Pathology of the resected mass causing the intussusception was compatible with a metastasis from the patient's malignant giant cell tumor of soft parts.

Automated summary

This case report describes an 89-year-old male patient with a history of malignant giant cell tumor of soft parts, who had recurrent/metastatic tumors in the right pelvis and pulmonary nodules suggestive of metastatic disease. Unexpectedly, a PET/CT scan revealed a right lower quadrant intussusception with a hypermetabolic mass as the lead point. Pathology of the resected mass confirmed it to be a metastasis from the patient's malignant giant cell tumor of soft parts.