86 
RTLA 692. Bullhead, Ictalurus sp. 
Material: Nine gross specimens 
Diagnosis: Tissue unsuitable for diagnosis 
Submitter: E. R. Brown 
RTLA 693. Hornyhead chub, Nocomis biguttatus 
Material: One gross specimen 
Diagnosis: Hyperpigmentation in epidermis 
Submitter: E. R. Brown 
RTLA 694. Northern pike, Esox lucius 
Material: One gross specimen 
Diagnosis: Probable neoplasm; tissue unsuitable for making a 
definitive diagnosis 
Submitter: E. R. Brown 
RTLA 695. Yellow bullhead, Ictalurus natalis 
Material: One gross specimen; two pieces of a lesion removed 
from the specimen 
Diagnosis: Pigmented epidermal papilloma 
Submitter: J. C. Harshbarger and J. A. Couch 
RTLA 696. Yellow bullhead, Ictalurus natalis 
Material: One gross specimen; two pieces of a lesion removed 
from the specimen 
Diagnosis: Pigmented epidermal papilloma 
Submitter: J. C. Harshbarger and J. A. Couch 
RTLA 697. Chinook salmon, Oncorhynchus tshawytscha 
Material: One pathologic piece of spleen; one normal piece 
of spleen 
Diagnosis: Hemangioendothelioma 
Submitter: G. R. Bell 
RTLA 698. Walleye, Stizostedion vitreum vitreum 
Material: Wet tissue 
Diagnosis: Lymphocystis 
Submitter: E. R. Brown 
RTLA 699. Walleye, Stizostedion vitreum vitreum 
Material: Wet tissue 
Diagnosis: Lymphocystis 
Submitter: E. R. Brown 
RTLA 700. Steelhead rainbow trout, Salmo gairdneri 
Material: A portion of fish extending from the anterior end of 
the second dorsal fin to the anal opening 
Diagnosis: Cystic well-differentiated nephroblastoma 
Submitter: J. G. Hnath 
RTLA 701. Chinook salmon, Oncorhynchus tshawytscha 
Material: A growth located ventral to the kidney 
Diagnosis: Cystic well-differentiated nephroblastoma 
Submitter: J. G. Hnath 
