Cystic mammary adenocarcinoma associated with a prolactin-secreting pituitary adenoma in a New Zealand white rabbit (Oryctolagus cuniculus).
Pituitary adenoma in a rabbitA 44-mo-old, female, nulliparous New Zealand White Rabbit (Oryctolagus cuniculus) presented with bilaterally diffusely enlarged mammary glands with enlarged, discolored teats that exuded brown, mucoid discharge. The complete blood count and serum chemistry panels were within normal limits, bacteria were not isolated from a culture of the discharge, and the clinical signs did not resolve with antibiotic treatment. Computed tomography and serum prolactin levels supported the diagnosis of mammary gland dysplasia, possibly due to a prolactin-secreting pituitary adenoma. Histologic evaluation confirmed the presence of a pituitary adenoma, mammary hyperplasia, dysplasia, and cystic mammary adenocarcinoma. Immunohistochemical staining confirmed the presence of abundant prolactin secreting cells in the pituitary adenoma. This is the second report of hyperprolactinemia with mammary dysplasia in rabbits, and the first report of cystic mammary adenocarcinoma associated with a prolactin-secreting pituitary adenoma in a rabbit.
Sikoski
Paul
P
Wake Forest University Health Sciences, Winston-Salem, NC, USA. paul.sikoski@vanderbilt.edu
Trybus
James
J
Cline
J Mark
JM
Muhammad
F Salih
FS
Eckhoff
Andrew
A
Tan
Josh
J
Lockard
Mandy
M
Jolley
Tammy
T
Britt
Susan
S
Kock
Nancy D
ND
D000230:Adenocarcinoma / Q000473:pathology*; D000236:Adenoma / Q000378:metabolism*; D000818:Animals; D008325:Mammary Neoplasms, Experimental / Q000473:pathology*; D011388:Prolactin / Q000378:metabolism*; D011817:Rabbits
D011388:Prolactin