-3- 
Neoplasms of neural origin predominated the bony fish accessions 
including three of only five central nervous system tumors ever received. 
Peripheral nerve tumors included a ganglioneuroma in a weakfish from 
D. E. Zwerner and Craig L. Ruddell (RTLA 1605); neurilemmomas/neurilemmal 
sarcomas in carp from George C. Blasiola, Jr. (RTLA 1618) and Dave 
Tomljanovich (RTLA 1747); in rainbow trout from Peter H. Wolf (RTLA 1642) 
and Barry J. Stevenson (RTLA 1786), and in goldfish from Harold Wolf (RTLA 
1643) and Robert Marino (RTLA 1771); a malignant melanophoroma in an aquar¬ 
ium catfish from June Herrin (RTLA 1647); a blue nevus in a trevally from 
Barry J, Stevenson (RTLA 1694); and, a neural fibrosarcoma whose species 
and contributor are unknown (RTLA 1658). The central nervous system tu¬ 
mors v/ere a well-differentiated olfactory neuroepithelioma in a carp from 
Prince Masahito Hitachi (RTLA 1707) and two ependymoblastomas in coho sal¬ 
mon, one from Gary E. Hoskins (RTLA 1783) and one from Jerry D. Hendricks 
(RTLA 1811). 
Renal neoplasms included nephroblastomas in a rainbow trout from 
Harold Wolf (RTLA 1615), a rose bitterling from Prince Masahito Hitachi 
(RTLA 1711), and a carp from George C. Blasiola, Jr. (RTLA 1775). Muscle 
tumors included dramatic virus-containing leiomyosarcomas in swim bladders 
of cultured Atlantic salmon from Ian J. McKnight and K. G. R. Elson (RTLA 
1660); a leiomyoma in a brown trout from Barry J. Stevenson (RTLA 1651); 
and, a rhabdomyosarcoma induced in a platyfish swordtail backcross hybrid 
with N-methyl-N-nitroso-urea from M. Schwab (RTLA 1732). Dr. Schwab also 
induced a fibrosarcoma in these hybrids with the same compound (RTLA 1733). 
An undifferentiated spindle cell sarcoma in a chinook salmon from Barry J. 
Stevenson (RTLA 1785) may be an embryonal rhabdomyoma. Huge cranial li¬ 
poma-like lesions, induced in fathead minnows with ammonia, were contri¬ 
buted by Charlie E. Smith (RTLA 1653-1657) and further experiments are 
in progress to determine if they are neoplastic or hyperplastic. J. Pal 
contributed a lipoma in a catfish (RTLA 1815) and Allyn G. Johnson con¬ 
tributed a lipoma in a finescale menhaden (RTLA 1664) and a two-pound 
fibrolipoma in a drum (RTLA 1662). Lipomas in a porgy (RTLA 1718) and a 
mojarra (RTLA 1730) were received from Walter Kandrashoff in a large batch 
of specimens (RTLA 1714-1722, 1724-1730) from North Biscayne Bay, Florida. 
The preponderance of lesions in the other fish in the batch were various 
gross manifestations of acute and chronic inflammatory reactions, often 
involving ulceration and/or parasites. Mr. Kandrashoff has seen an in¬ 
creasing prevalence of these conditions during the decade and feels that 
this increased susceptibility to parasites is related to increased amounts 
of organic chemicals going into the bay. 
Hematopoietic neoplasms included malignant lymphomas in a rainbow 
trout from Charlie E. Smith (RTLA 1814) and in a blackfin pearlfish from 
George C. Blasiola, Jr. (RTLA 1646). Individual cases included a caver¬ 
nous hemangioma in a rainbow trout from Barry J. Stevenson (RTLA 1650), 
a mesothelioma in a jewfish from Robert R. Shields (RTLA 1617), an epi¬ 
dermal papilloma in a climbing perch from Joydeb Pal (RTLA 1738), a car¬ 
cinoma possibly of ultimobranchial gland origin in a cutthroat trout from 
Charlie E. Smith (RTLA 1837), a thyroid adenoma in a Kinubari from Prince 
Masahito Hitachi (RTLA 1712), and an ichthyematoraa (fish scale tumor) in 
a goldfish from Nelson Herwig (RTLA 1822). Over the years, we have re- 
