[Nodular fasciitis of the orbit]

Nodular fasciitis of the breast: two cases with a review of imaging findings

Nodular fasciitis of the breast is a rare, benign, proliferative disease characterized by sudden onset and rapid growth. It can clinically and radiologically mimic breast cancer. We present imaging findings from two cases of nodular fasciitis that initially manifested as palpable masses. Sonographically, they appeared as irregular, not-circumscribed hypoechoic nodules. The diagnosis of nodular fasciitis was made by US-guided core needle biopsies. US-guided vacuum-assisted excision was subsequently performed in the first case, while the second resolved via spontaneous regression.

Immunohistological and electron microscopical study of nodular fasciitis of the orbit

We report the case of a 7-year-old Japanese girl with nodular fasciitis which was investigated by immunohistological and electron microscopical methods. An excised nodular lesion in her right orbit showed characteristic histological features of the disease. The fibroblastic cells showed myofibroblastic characteristics, such as immunohistochemically positive reactions against muscle specific actin and vimentin and characteristic electron microscopical appearances. The multinuclear giant cells did not react against any histiocytic markers, including HLA-DR, antimacrophage antigen, lysozyme, and S-100 protein, but the myofibroblastic markers and the electron microscopical study did reveal myofibroblastic characters.