Nodular Fasciitis of the Breast Mimicking Breast Cancer

Abstract EN

Nodular fasciitis is a benign proliferative lesion that is usually found in the soft tissue of the upper extremity and trunk in young to middle-aged persons.

It has rarely been described in the breast.

A 35-year-old woman had noticed a mass in her left breast.

It was elastic-hard, 13 mm in size, and located mainly in the upper inner quadrant of the left breast.

Mammography did not detect the mass.

Ultrasonography revealed a hypoechoic lesion with an irregular margin.

Neither fine-needle aspiration cytology nor core needle biopsy established a definitive diagnosis.

Excisional biopsy was therefore performed.

Histologically, the excised tumor tissue results were consistent with a diagnosis of nodular fasciitis of the breast.

We report a case of nodular fasciitis of the breast, a rare histological type of breast tumor.