Nodular fasciitis is a relatively common lesion usually presenting in soft tissues. The occurrence in the breast is exceptional rare. Histologically, this tumor is characterized by plump spindle cells arranged in short fasci-cles. Occasionally, osteoclast-like giant cells may be present. Herein, we present a case of breast nodular fasciitis in a 46-year-old Chinese female. The tumor was predominantly composed of abundant spindle cells with light to moderate atypia and scattered osteoclast-like

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... iant cells and lymphocytes reminiscent of inflammatory myofibroblastic tumor. The unusual histological appearance can pose a great diagnostic challenge. It may be easily misdiagnosed, especially if the specimen is limited or from fine-needle aspiration.