The breast:

is an apocrine gland containing the mammary gland that produces milk to feed an infant child.

•Both men and women develop breasts from the same embryological tissues.

•However, at puberty, female sex hormones, mainly estrogen, promote breast development, which does not occur in men, due to the higher amount of testosterone.

• the breast is a cone with the base at the chest wall, and the apex at the nipple.

• nipple: is a small projection of skin containing the outlets for 15–20 lactiferous ducts arranged cylindrically around the tip.

• Areola: the pigmented area on the human breast around the nipple.

• Each breast contains 15–20 lobes. The subcutaneous adipose tissue covering the lobes gives the breast its size and shape.

• Each lobe is composed of many lobules, at the end of which are sacs where milk is produced in response to hormonal signals.

• the weight of the breast 500–1,000 grams.

•Sensation in the breast is provided by the peripheral nervous system innervation, by cutaneous branches of the fourth-, the fifth-, and the sixth intercostal nerves.

• vascularisation:

• Lymphatic drainage: 75% of the lymph from the breast travels to the ipsilateral axillary lymph nodes, whilst 25% of the lymph travels to the parasternal nodes.

Types of Breast Lumps

A)- Cysts and Abscess Lumps:

• breast cyst is a non-cancerous, fluid-filled sac in the breast. They generally feel smooth or rubbery under the skin and can be quite painful or cause no pain at all. Cysts are caused by the hormones that control the menstrual cycle and are rare in women older than 50.

• sebaceous cyst is a non-cancerous, closed sac or cyst below the skin that is caused by plugged ducts at the site of a hair follicle. Hormone stimulation or injury may cause them to enlarge but if no symptoms are present, medical treatment is not required.

• Abscesses are non-cancerous pockets of infection within the breast. They can be quite painful and cause the skin over the breast to turn red or feel hot or solid. Abscesses of the breast are most common in women who are breast-feeding.
B)- Growths:

• Adenomas are non-cancerous abnormal growths of the glandular tissue in the breast. The most common form of these growths, fibroadenomas, occur most frequently in women between the ages of 15 and 30 and in women of African descent. They usually feel round and firm and have smooth borders. Adenomas are not related to breast cancer.

• Intraductal papillomas are wart-like growths in the ducts of the breast. These lumps are usually felt just under the nipple and can cause a bloody discharge from the nipple. Women close to menopause may have only one growth, while younger women are more likely to have multiple growths in one or both breasts.

• Breast cancer usually feels like a hard or firm lump that is generally irregular in shape and may feel like it is attached to skin or tissue deep inside the breast. Breast cancer is rarely painful and can occur anywhere in the breast or nipple

C)- Fatty Lumps:

• Fat necrosis is a condition in which the normal fat cells of the breast become round lumps. Symptoms can include pain, firmness, redness, and/or bruising. Fat necrosis usually goes away without treatment but can form permanent scar tissue that may show up as an abnormality on a mammogram.

• lipoma is a non-cancerous lump of fatty tissue that is soft to the touch, usually movable, and is generally painless.

-:Caution :-