Cystadenocarcinoma and leiomyoma in a peregrine falcon (Falco peregrinus brookei)

NEOPLASTIC diseases are relatively common in companion birds, but most notably in the budgerigar ( Melopsittacus undulatus ) and, to a lesser extent, the cockatiel ( Nymphicus hollandicus ) ([Ratcliffe 1933][1], [Frost 1961][2], [Beach 1962][3], [Effron and others 1977][4], [Mrzel and others 1979][5