cystic hyperplasia

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cys·tic hy·per·pla·si·a

formation of multiple retention cysts from obstruction of ducts or glands by hyperplasia of the lining epithelium, as in fibrocystic disease of the breast and metropathia hemorrhagica.

cystic hyperplasia

(1) Fibrocystic disease of breast, see there. 
(2) A nonmalignant histologic change seen in perimenopausal endometria.


1. pertaining to or containing cysts; see cyst.
2. pertaining to the urinary bladder or to the gallbladder.

cystic calculus
calculus in the urinary bladder.
cystic corpus luteum
the normal corpus luteum is solid. Some have a central cavity filled with fluid but this does not affect their function. See also luteal cyst.
cystic duct
the excretory duct of the gallbladder. See also bile duct.
cystic endometritis
cystic eye
the failure of the optic vesicle to come into close apposition to the cranial ectoderm during embryological development results in persistence of the vesicle and the formation of a cystic eye.
cystic follicle
see cystic follicle; cystic ovarian degeneration (below).
cystic hyperplasia
see cystic endometrial hyperplasia.
cystic hyperplasia-pyometra complex
the term applied to a series of endometrial changes leading to pyometra in dogs; first cystic endometrial hyperplasia, then plasma cell infiltration of the endometrium during diestrus, followed by acute inflammatory reaction which then becomes chronic.
cystic ovarian degeneration (disease)
includes cystic follicle, luteal cyst, cystic corpus luteum (above). A major cause of reproductive failure and economic loss in dairy cattle. Results in an increase in days open in the post partum period and an increase in culling rates for reproductive failure. It occurs when a mature follicle fails to ovulate as a result of exogenous or endogenous disruption of the hypothalamo-hypophyseal-ovarian axis; the resultant anovulatory follicular structure can regress or persist as a follicular cyst or a luteal cyst depending on its structural characteristics. Diagnosis and differentiation of follicular cysts and luteal cysts has traditionally been by rectal palpation but ultrasound examination is more accurate.
cystic pancreatic duct
a sometime congenital defect; occasionally associated with polycystic kidneys and cystic bile ducts.
cystic placental mole
results from the death of the fetus with the persistence of the fetal membranes.
cystic prostatic hyperplasia
caused by blockage of glandular ducts. Enlargement of the gland may cause constipation, possibly dysuria. The enlarged gland should be palpable per rectum.
cystic rete tubules
occur in the ovaries of cows, bitches, queens; may be sufficiently large to be mistaken for cystic follicles.
cystic retinal degeneration
cystic right oviduct
the right oviduct in birds regresses to a vestigial level in the adult; sometimes the regression is incomplete and a cyst develops.