Table 3.
Prevalence of Intestine Presentations as Observed Within Zebrafish Submitted to the Zebrafish International Resource Center Diagnostic Service 2000–2012
| Type | Prevalencea (%) | |
|---|---|---|
| Preneoplastic changes | Hyperplasia only | 67.1 |
| Hyperplasia and dysplasia | 32.9 | |
| Neoplastic changes | Adenocarcinoma | 50.4 |
| Small cell carcinoma/carcinoid-like | 37.2 | |
| Carcinoma not otherwise specified | 9.7 | |
| Tubular adenoma | 1.8 | |
| Tubulovillous adenoma | 0.9 |
a
Fish classified as neoplastic often displayed preneoplastic changes, but are not counted among the fish with preneoplastic changes for this study, as we considered the tumor formation a notable progression following the preneoplastic lesions. For this reason, prevalence is calculated relative to either the preneoplastic or neoplastic population affected.