Invasive lobular carcinoma arising in accessory breast tissue.
BACKGROUND: Lobular carcinoma in accessory breast tissue is a rare occurrence. We present such a case in a 61-year-old woman. CASE PRESENTATION: A skin nodule in the axillary skin on excision biopsy revealed invasive lobular carcinoma. CONCLUSIONS: Carcinoma in accessory breast tissue is uncommon especially invasive lobular type. A high index of suspicion may avoid late diagnosis.