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254
Rutilus rutilus
Roach (inc. hybrids)
Fibroma
Testicular origin?
Idiopathic lesion
Idiopathic lesion
Only one fish submitted.
"Loose" ovoid tissue composed of well differentiated fibrocytes. Also an encapsulated area of testes.
River Thames
Not recorded
UK
R. Sweeting
7/23/1981