Antibiotics were initiated for presumed infection; however,
the mass persisted, prompting surgical referral. Clinical examination demonstrated a 2 1 cm superficial mass, with adjacent accessory nipple. An ultrasound confirmed a 15-mm
hypo-echoic mass consistent with a sebaceous cyst; however, a
core biopsy confirmed a Grade 2 invasive ductal carcinoma
(IDC), strongly positive for oestrogen and progesterone
receptors (Allred scores of ER 7, PR7). Immunohistochemistry
for Her 2 status was negative (0).