Common Soft Tissue Mass-like Lesions that Mimic Malignancy

Benign and malignant soft tissue tumors have many overlapping and potentially confusing imaging features. Here we discuss imaging and clinical features of 6 soft tissue tumor mimics: myositis ossificans, acute traumatic hematoma, geyser lesion, tumoral calcinosis, gout, and myonecrosis. These 6 lesions are some of the most common benign soft tissue mass-like lesions erroneously labeled as "malignancy." Familiarity with these lesions can potentially spare the patient biopsy, other invasive and noninvasive work-up, and anxiety.