Papilloma and squamous cell carcinoma in koi carp (Cyprinus carpio)
Wildgoose, W.H.
Veterinary Record 130(8): 153-157
1992
ISSN/ISBN: 0042-4900 PMID: 1566540 Document Number: 394500
Over a period of 2 years 4 ornamental koi carp of one variety in a mixed population of 16 were affected with papillomas of the head and body. In one fish there was a transition of these tumours into a squamous cell carcinoma in the region of the head and posterior gill space, with deep invasion of the underlying bone. One of the fish recovered completely after the sloughing of the papillomas. In view of the progressive nature of the lesions, the condition was presumed to be due to an infectious agent, but transmission electron microscopy failed to reveal any virus particles.