Magnetic resonance imaging features of inflammatory breast metastasis from gastric signet-ring cell carcinoma

This report presents a rare case of inflammatory breast metastasis from gastric signet-ring cell carcinoma. The clinical and radiologic findings were similar to those of primary inflammatory carcinoma or acute mastitis. Further, ultrasonography showed diffuse skin thickening and a diffuse infiltrative hypoechoic lesion with marked posterior acoustic shadowing in the left breast. Similarly, magnetic resonance imaging showed diffuse skin thickening/enhancement and a diffuse non-mass-like enhancement in the left breast and to a lesser degree in the right breast.