Four cases of neoplasia in amphibians at two zoological institutions: Alpine newt Ichthyosaura alpestris, Red-eyed tree frog Agalychnis callidryas, Common frog Rana temporaria and Puerto Rican crested toad Peltophryne lemur

Four cases of spontaneous neoplasia in different species of Amphibia at two zoological collections in the United Kingdom (2009–2016) are described: disseminated lymphosarcoma with leukaemia in an Alpine newt Ichthyosaura alpestris, nasal adenocarcinoma in a Red-eyed tree frog Agalychnis callidryas, pulmonary carcinoma in a Common frog Rana temporaria and cutaneous mast-cell tumour in a Puerto Rican crested toad Peltophryne lemur. History, and gross and histological findings are presented. In particular, mast-cell tumours in Anura and respiratory tumours of amphibians have rarely been reported.