Granulosa cell tumor in a double yellow-headed Amazon parrot (Amazona oratrix)


   

Granulosa cell tumor in a double yellow-headed Amazon parrot (Amazona oratrix) 
Julia Bumberry,a Reed Holyoak,a Lauren Schmidt,a Ian Kanda,a João Brandão,a 

aCenter for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK 
 

A 25 year old, intact female, double yellow-headed Amazon parrot (Amazona oratrix) presented 
with acute diarrhea, coelomic distention, respiratory distress and reluctance to perch. Ultrasound-guided 
coelomocentesis was performed. Cytology of coelomic fluid indicated exudative effusion containing 
macrophages and heterophils, but no infectious organisms. A coelomic computed tomography scan 
revealed coelomic fluid, compressed caudal air sacs and a coelomic mass, presumptively oviductal or 
ovarian in origin. A 4.7 mg subcutaneous deslorelin implant was placed interscapular. Coelomic 
exploratory surgery was performed, with an intention to remove the mass via salpingohysterectomy or 
ovariosalpingohysterectomy. During surgery, a cystic structure that filled majority of caudal coelom was 
drained of thick, amber fluid. Deep to this structure, a mass associated with left oviduct was identified, 
along with a second suspected mass in the right coelom. Due to severity of adhesions throughout coelom, 
association of masses to ureters and large vessels and high surgical risk, owner elected to discontinue 
surgery and pursue palliative treatment. Patient was maintained on deslorelin implants and regular 
therapeutic coelomocentesis as needed. Three months after initial presentation, the patient died. At 
necropsy, there was a malignant granulosa cell tumor that originated from the ovary and metastasized into 
lymphatics and surrounding tissues. This presentation of an ovarian granulosa cell tumor was unusual in 
Psittacines. Surgical excision of neoplastic tissue is challenging, but medical management may provide 
conservative treatment for reproductive neoplasia and secondary coelomic ascites in Psittacines.  

Keywords: Psittacine, parrot, ovarian, neoplasia, coelomocentesis, deslorelin 

415 Clinical Theriogenology • Volume 11,  Number 3 • September 2019



416Clinical Theriogenology • Volume 11,  Number 3 • September 2019


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