The described clinical features are unique to fat necrosis but also seen in breast cancer, thus you mush pre-specify that it is a benign condition. See AMBOSS for reference (breast cancer --> Clinical features, see below pasted from amboss and you can see the overlap):
Reference AMBOSS
Breast cancer is frequently asymptomatic and often detected on routine screening. Symptoms typically manifest at more advanced stages of the disease.
Breast changes
Palpable breast mass with the following characteristics:
Typically single, nontender, and firm
Poorly defined margins
Most commonly located in the upper outer quadrant (∼ 55%)
Breast asymmetry
Skin changes
Retractions or dimpling (due to fixation to the pectoral muscles, deep fascia, Cooper ligaments, and/or overlying skin)
Peau d'orange
Nipple inversion
Blood-tinged nipple discharge