Humeral air sac cystadenocarcinoma in a rainbow lorikeet (Trichoglossus moluccanus)

Abstract

Background A 17-year-old female rainbow lorikeet (Trichoglossus moluccanus) was presented for a swelling over the right proximal humerus and an inability to fly.Case report Radiographs revealed a markedly osteoproductive and moderately osteolytic lesion of the proximal left humerus with marked associated soft tissue swelling. Biopsy of the proximal humerus was consistent with an air sac cystadenocarcioma. The bird's condition deteriorated over 25 days after initial presentation and it developed a respiratory wheeze, tail bob, tachypnea and died. On postmortem examination, the bird was found to have an air sac cystadenocarcinoma associated with the proximal humerus, extending into the thoracic cavity through a network of fibrous sheets and displaying infiltration into the lung tissue bilaterally.Conclusion This is the first report of a humeral air sac cystadenocarcinoma in a lorikeet and it builds on our understanding of the species affected by avian neoplasia.

Papillary Cystadenocarcinoma in a Budgerigar (Melopsittacus undulatus)

“…The ovary and kidney are the most commonly affected organs (Hochleithner, 1990;Reavill, 2004;Powers et al, 2019). Cystadenocarcinomas are a discrete group of epithelial tumors described by invasive growth and cystic structures often organized in a papillary pattern (Azmanis et al, 2013;Baron et al, 2020). Cystadenomas and cystadenocarcinomas have been reported in a variety of avian species, including the African grey par-rot (Psittacus erithacus) (Hochleithner, 1990), Timneh African grey parrot (Psittacus erithacus timneh) (Azmanis et al, 2013), rainbow (Trichoglossus moluccanus) (Baron et al, 2020), saker falcon (Falco cherrug) (Samour et al, 2001), sulfur crested cockatoo (Cacatua galerita) and galahs (Eolophus roseicapilla) (Raidal et al, 2006).…”