uses cookies to improve your experience on the site. Your continued use of the site constitutes your acceptance of use of cookies on this site.
Find out more about how SonoWorld uses cookies. I’m OK with Cookies from SonoWorld - stop showing me this banner.
189,629 Registered Members as of 11/30/2021.
Breast » Breast
Carcinoma in ectopic breast tissue
« Back to Listing
Presentation A 36-year-old woman presents with a mass in the right axilla. Mammogram and ultrasound examination was performed.
Caption: Cranio-caudal mammograms
Description: Both breasts reveal no abnormality in this image.
Caption: Mediolateral oblique views
Description: Multiple masses are seen in the right axillary area and are highly suspicious for malignancy. The rest of the breast parenchyma appears normal.
Caption: Ultrasound of the right axillary mass
Description: The mass appears solid, is spiculated and is highly suspicious for malignancy.
Differential Diagnosis Malignancy
Final Diagnosis Carcinoma in ectopic breast tissue
Discussion • This is a very rare malignancy and there are few references in the literature.
• Most cases are referenced in the axillary breast tissue. These may clinically present as a pigmented skin nodule which usually represents an ectopic nipple.
• Ectopic nipples and accessory breast tissue can occur anywhere along the nipple line from the axilla to the pelvis
• On physical examination there is unusual firmness under the ectopic nipple suggestive of a mass.
• Mammograms will show an asymmetric density or discrete mass.
• Sonograms will demonstrate a solid mass. 
Case References 1. Aviles Izquierdo JA et al. Pigmented axillary nodule; carcinoma of an axillary breast. Dermatol Surg 2005 Feb; 31(2)237-9
2. Oshida K et al. Phylllodes tumor arising in ectopic tissue of the axilla Breast cancer 2003: 10(1) 82-84
Follow Up Biopsy of the mass revealed carcinoma in ectopic breast tissue
Other contents by this AuthorOther Cases in This Category