Foreign body granulomas represent a tissue reaction to retained foreign bodies.
Foreign body granulomas typically present as a tender mass.
Lesion morphology can vary widely and depends on the material, size and location of the foreign body 1.
High frequency (>10 MHz) linear probe is useful 1:
- foreign bodies typically appear echogenic with posterior acoustic shadowing
- foreign body granuloma appears as a hypoechoic halo that can consist of hematoma, edema and/or granulation tissue
- foreign body granulomas have been misdiagnosed as soft tissue tumors when a foreign body is not seen or recognized 1