Intermammary cleft

[1][2][3][4][5] The International Federation of Associations of Anatomists (IFAA) uses the terms "sulcus intermammarius" or "intermammary cleft" when referring to the area between the breasts.

[18] The sternalis muscle is an anatomical variation that lies in front of the sternal end of the pectoralis major runs along the anterior aspect of the body of the sternum.

[23] A dense structure of Cooper's ligaments is medially inserted into the skin overlying the sternum, determining the shape of the breasts and intermammary sulcus.

[1] The intermammary lymphatics begin as a bunch of small channels consisting of a single layer of epithelium that is supported by stroma tissues.

[31] The first intercostal nerve, a tiny branch (ramus) of the anterior division of the first thoracic nerve, runs along the first intercostal space (the lower margin of the first rib), travels towards the sternum to innervate the skin near the midline, and, as the first anterior cutaneous (skin) branch of the thorax, ends on the front of the chest.

[36][37] It is characterized by hypopigmentation, hyperpigmentation, telangiectasias and superficial skin atrophy (occasional itching is reported), is another condition caused by long exposure to sunlight.

[41] Tinea versicolor is a condition characterized by pinhead to coin sized eruptions on the body trunk and proximal extremities, often affecting the breast cleavage as a narrow band of lesions.

[47] Prurigo pigmentosa is a rare skin condition of unknown cause that affects depressed places on chest and back like the intermammary area.

[48][49] Confluent and reticulated papillomatosis, characterized by asymptomatic, small, red to brown, slightly verrucous papules occurs on upper torso, the cleavage area and back.

Iatrogenic symmastia may occur following breast augmentation, forming what is also colloquially referred to as a "uniboob" or "breadloafing" as a result of the release of skin and muscle tissue around the sternum due to over-dissection.

It also is the focal point for regulate the flow of qi, the vital force of any living entity, in the entire body, especially in the chest and breasts.