RT Journal A1 Oberman HA, Nosanchuk JS, Finger JE T1 PEriductal stromal tumors of breast with adipose metaplasia JF Archives of Surgery JO Archives of Surgery YR 1969 FD March 1 VO 98 IS 3 SP 384 OP 387 DO 10.1001/archsurg.1969.01340090160034 UL http://dx.doi.org/10.1001/archsurg.1969.01340090160034 AB Although the predominant connective tissue component of the female breast is adipose tissue, there are only rare reports of primary mammary lipoblastic neoplasms. Depending upon the rigidity of criteria, between 20 and 30 patients with such neoplasms previously have been recorded.1,2 The large amount of fat in these tumors was distinct from the small foci of mature fat occasionally seen in adenofibromas or in cystosarcomas.The three women described below had periductal stromal tumors composed predominantly of fat. In two of the tumors the mesenchymal component was liposarcomatous, while the third tumor was a cellular adenofibroma with extensive adipose metaplasia.Report of Cases  Case 1.—A 41-year-old woman with no history of previous breast disease presented with a freely movable firm mass, 2 cm in diameter, above the nipple of the right breast. The tumor was detected during a routine physical examination, and had not previously been noted by the