Collagenous spherulosis of breast: diagnosis by FNAB with review of literature.

Collagenous Spherulosis (CS) of breast is an innocuous but interesting uncommon morphological feature observed with a variety of benign and malignant breast lesions. We report a case of collagenous shperulosis associated with nodular sclerosing adenosis (Adenosis tumor) on fine needle aspiration (FNA) smears confirmed later by biopsy. The differential diagnosis of collagenous spherulosis is discussed.