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An abscess in the female breast, esp. one involving the glandular tissue. It usually occurs during lactation or weaning.Synonym: breast abscess
See also: abscess
pertaining to the mammary gland.
usually an abscess of connective and subcutaneous tissue with no abnormality of the milk. Large masses of necrotic debris may occur in infection of the udder by Arcanobacterium pyogenes but these are usually classified as mastitis because they connect with the duct system and cause the discharge of pus in the milk.
the absence of milk secretion in an animal that has recently given birth and has normal mammary development. See also agalactia.
produced along the length of the embryonic mammary ridge these buds represent the future locations of the mammary glands. Invagination of ectoderm at each bud leads to the development of epithelial diverticula, later maturing as lactiferous ducts.
recorded in ewes; filled with milk.
mammary ductal ectasia
milk ducts are distended with proteinaceous fluid containing cell debris. Common in bitches and queens. May rupture to the exterior causing granulomas. Called also mammary ductal hyperplasia.
mammary ductal hyperplasia
see mammary ductal ectasia (above).
mammary ectopic tissue
bilateral swellings in vulvar tissue; enlarge at parturition; milk can be aspirated.
occurs in the few days before or immediately after calving. The udder and the teats, often the escutcheon and sometimes the ventral abdominal and even the ventral thoracic wall are obviously misshapen by pitting edema. The teats may be so swollen that milking is difficult.
feline mammary hypertrophy
a hormone-dependent, benign enlargement of one or more mammary glands, occurring spontaneously in young, intact female cats and in others treated with progestins. Called also fibroepithelial hyperplasia, fibroadenomatous hyperplasia and fibroadenomatosis.
diffuse thickening or local lumps palpable through skin, mostly in ventral part; may be sufficient to cause asymmetrical enlargement of the gland; terminally leads to atrophy.
a lesion which includes skin, a well demarcated mass of tissue usually involving whole or part of teat; secretion is watery, red-tinged; gangrenous mass eventually sloughs leaving a slow-to-heal gaping cavity.
a gland of female mammals developed from specialized sweat glands, which secrete milk for nourishment of the young. The mammary glands are composed of alveolar tissue, with the alveoli lined by milk-secreting epithelium, and connecting to a collecting duct system which empties into the milk cistern (sinus) at the base of the teat and then into the teat cistern (sinus). They exist in a rudimentary state in the male. In food animal females and mares, called also udder.
mammary gland caking
appears as a hard plaque along the floor of the udder, usually in a first calf heifer immediately after calving. The milk is normal but the udder is sore and let-down is poor.
mammary gland suspensory ligament
see udder suspensory apparatus.
normal tissue on palpation but quarter enlarged compared to opposite one of pair.
failure of the glands to develop. It is also usually extended to include those udders or individual quarters that do not undergo reconstitution after regression during a dry period.
regression of mammary tissue to a non-secreting state, with disappearance of much of the epithelial tissue. The process can be induced by the infusion of colchicine into the milk system.
an increase in the number of ducts per lobule of mammary gland.
is rare in food animals and mares. It accounts for approximately 25% of all neoplasms in dogs but is less common in cats.
mammary pustular dermatitis
an infectious disease of lactating cows consisting of 2 mm diameter thin-walled pustules on the skin of the teats and the ventral udder. There may be similar lesions on the hands of the milkers. The cause is bovine herpesvirus 2. Called also udder impetigo, udder acne.
just before parturition and for the first week afterwards the secretion is thick, sticky colostrum. This is followed by milk for the duration of the lactation and superseded in the weeks after drying off by honey-dew, a clear, viscid secretion. The gland may be completely dry for a variable period between lactations.
mammary suspensory ligament rupture
a condition manifested by separation of the median ligaments (medial laminae) resulting in the glands dropping ventrally. The teats point almost laterally. It is a problem of recently calved cows. Called also dropped udder.
mammary tumor Gilbertson classification
used in the classification of human breast tumors as an aid to prognosis; five grades of severity based on morphological criteria, especially degree of local invasion and lymph node involvement.
congenital lack of development of all glands, possibly an inherited defect.