Mamma accessoria

Natural milk
lines
Wikipedia • CC BY-SA 3.0
Lactating
accessory axillary breast tissue with supernumerary nipples along the milk line in a puerpera. Longitudinal plane of the left axilla, depicting several tubular anechoic structures compatible with lactating milk ducts, with a vascularized stroma between them.
www.eurorad.org • CC by-nc-sa-4.0
Primary
ectopic axillary breast cancer: a case series . Mammography revealing an ectopic breast ill-defined opacity. A thoracic–abdominal–pelvic scan did not detect any distant metastasis. We staged the tumor as T2N1M0 according to the TNM system
jmedicalcasereports.biomedcentral.com • CC-by-4.0
Primary
ectopic breast cancer of the vulva, treated with local excision of the vulva and sentinel lymph node biopsy: a case report. Lymphoscintigraphy showed hot areas at the right inguinal lymph node (thick arrow) and right obturator lymph node (thin arrow)
surgicalcasereports.springeropen.com • CC-by-4.0
Accessory
breast tissue • Accessory axillary breasts and supernumerary nipple - Ganzer Fall bei Radiopaedia
Salam H, Accessory axillary breasts and supernumerary nipple. Case study, Radiopaedia.org (Accessed on 08 Jan 2023) https://doi.org/10.53347/rID-9292 • CC by-nc-sa 3.0 (modified)
Lactating
accessory axillary breast tissue with supernumerary nipples along the milk line in a puerpera. The clinically detected tumefaction, with a nipple in its center, is shown. It was found to correspond to accessory axillary breast tissue with lactation changes.
www.eurorad.org • CC by-nc-sa-4.0
Lactating
accessory axillary breast tissue with supernumerary nipples along the milk line in a puerpera. Axial plane of the left axilla depicting similar findings to those in Fig. 1.
www.eurorad.org • CC by-nc-sa-4.0
Lactating
accessory axillary breast tissue with supernumerary nipples along the milk line in a puerpera. A supernumerary nipple (center of the picture) is depicted.
www.eurorad.org • CC by-nc-sa-4.0
Radiopaedia • CC-by-nc-sa 3.0 • de

Accessory breast tissue is a relatively common congenital condition in which abnormal accessory breast tissue is seen in addition to the presence of normal breast tissue. This normal variant can present as a mass anywhere along the course of the embryologic mammary streak (axilla to the inguinal region).

Common locations

  • chest wall
  • vulva
  • axilla
  • knee
  • lateral thigh
  • buttock
  • face
  • ear
  • neck

Epidemiology

Found in 2-6% of women and 1-3% of males . Although present from birth, patients are often not aware of it until puberty.

Clinical presentation

Most women are unaware of their accessory breast tissue and it is detected incidentally on a mammogram. Discomfort, pain, milk secretion, axillary thickening, and local skin irritation can occur. Accessory breast tissue responds to hormonal stimulation and may become more evident during menarche, pregnancy, or lactation. On examination, supranumerary nipples may also be seen.

Pathology

This tissue ranges from a small focus of parenchyma to complete structures (which may include nipple and areola).

It is also important to remember that both benign and malignant diseases of breast tissue in ectopic locations in adult women have been described.

Location

Accessory breast tissue can be found anywhere along the thoracoabdominal region of the milk line (the embryologic mammary streak) but are most frequently found in the axilla and may occur bilaterally. They are very rarely seen in the face, back, and thigh.

Associations

Various disorders associated with supernumerary nipples include:

Radiographic features

Most accessory breast tissue is found coincidentally on routine screening mammography.

Breast ultrasound

Ultrasound imaging shows breast tissue, indistinguishable from regular breast.

Breast MRI

Occasionally performed in challenging atypical cases but in practice this is rarely needed. The signal and enhancement characteristics are similar to normal glandular tissue.

Treatment and prognosis

No treatment is required in the vast majority of cases. The treatment of choice for symptomatic accessory axillary breast tissue is surgical excision as removal of the tissue will relieve physical discomfort or mechanical discomfort in the case of large volume accessory tissue.

In common with regular breast tissue, accessory mammary tissue may exhibit malignancy, fibroadenoma, mastitis, and fibrocystic change. The ectopic breast tissue has been found to have a higher propensity to develop malignancy and occurs at an earlier age. Excessive breast growth (macromastia) can be seen in pregnancy as well as during adolescence.

Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu Mamma accessoria:
hypertrophe
Pylorusstenose
pediatricimaging.org • CC-by-nc-sa 4.0
Polythelie
 
Wikipedia • CC BY-SA 3.0
Milchleiste
 
Wikipedia • CC BY-SA 3.0
maligne
Neoplasien des Hodens
Wikipedia • CC BY 3.0
Mammakarzinom
in ektopem Drüsengewebe
jmedicalcasereports.biomedcentral.com • CC-by-4.0