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MAMMARY PATHOLOGY (Congenital/ Non-infectious (Malformation (aplasia,…
MAMMARY PATHOLOGY
Congenital/ Non-infectious
Galactorrhea
effects of maternal hormones on foetal pituitary
resolve spontaneously
can be seen in adults
dioestrus period
Malformation
aplasia
hypoplasia
inversion
non-patency
Supernumerary teats
common in cattle
may affect attachment of neonates/ milking machine
Pigmentation
Trauma
Mastitis
Routes
Haematogenous
Percutaneous
Invasion from the teat canal
Clinical presentation
subclinical
clinical
severe
fatal
Causes
bacterial invasion
disruption of micronenvironment
Pathogenesis
Trauma and cell damage
Invasion of udder and bacterial proliferation
Tissue penetration and inflamamtion
Epithelial cell death
exudation and desquamation
Clinical mastitis and sequelae
Fibrosis
Chronic infection|Abscessation
Sloughing of gangrenous tissue
Death
Bovine Mastitis
Aetiological agents
Contagious
Streptococcus agalactiae
Staphylococcus aureus
Environmental
E.coli
Inflammatory paterns
Acute catarrhal
Acute suppurative
Necrotising
Endotoxic shock syndrome
Chronic suppurative
Mamamry neoplasia
common in dogs and cats
Non-neoplastic conditions
Mammary ductal and lobular hyperplasia
may be pre-neoplastic
Mammary fibroepithelial hyperplasia
feline mammary hypertrophy
typically seen in young, cycling or pregnant queens
may be induced by treatment with synthetic prgestagens
can spontaneously regress or require ovariohysterectomy
marked swelling of mammary tissue with erythemia
+/- ulceration and necrosis
proliferation of well-differentiated ductular epithelium and stroma
marked stromal oedema
Dog
Cat
frequently malignant