This document discusses patterns of fine needle aspiration cytology (FNAC) findings in benign and malignant breast lesions. It provides classifications of breast lesions, descriptions of cytology findings for specific lesions such as fibroadenomas, papillomas, cysts, fat necrosis, and various types of breast carcinomas. It notes that while FNAC is useful for evaluating breast lesions, its ability to distinguish between some proliferative benign lesions and low-grade carcinomas is limited. Histopathological examination is often needed for definitive diagnosis.