Neurofibroma are benign tumour of peripheral nerve sheath  that are mostly sporadic.Solitary neurofibromas of breast are uncommon.In this study,a case of 21 year old female was referred with complaint of hyperpigmented lump in Left breast since birth with recent increase in size for 5 months.Ultrasonography revealed a well defined hypoechoic space occupying lesion in subcutaneous plane at 11’o clock position of left breast along with a large ill -defined hypoechoic area with normal vascularity noted extending from 11’o clock to 2’o clock area in left zbreast.Microscopically,the underlying stroma showed proliferating spindle cells with interspersed collagen bundles.Spindle cells show bland serpentine (wavy dark) nuclei and scant cytoplasm.