A case of a 56 years old female patient with a giant tumour of the left pectoral region developed in a 2 years time was reported. The tumour, free from skin and pectoral muscles, was after mammectomy 25 x 15 x 5 cm, 2.200 grs, multilobaed, albescent with hemorrhages zones and predominantly hard, the rest of the breast being extremely reduced in comparison with the volume of the tumour itself. The initial histological aspect was that of a benign spindle cell tumour and only after some neurohistological techniques the diagnosis established was neurofibroma. The literature data and the exceptional mammary localization of this tumour were reviewed.