1828). This 11odr1lc Kiln u l ) o ~ ~ t
I .!i c:nl in tiismeter, and this Sei whale
wiw t h o ~ ~ g h t
to I)(. ;~ged ul,out 48. Histologically, this tumour had
~hects of c(4is hcuvily packed with melanin which obscured all else.
Many srnall ;~rterioles were sc?en in the tumour. After bleaching the cells
with hydrogcbn peroxicte the (~11s wen: seen to have vesicular nuclei, wit-h
WIU. 16. Fibro~nattl. of ~11out.a in Urcbenoptsm nhzcecul~~. The papillifernus natum of t h ~
t,rctnour.r, b clttarbly seon.
promiuent nucleolus, these cclls contained more cytoplasm than those
cells which did not contain pigment. S o functional activity was noted
at the epidermal-dermal junction; the overall comments by these
uuthors was that the tumour showed evidence of hamartomatou~
proliferation involving melanocytes and arterial-type blood veesels.
E'inally, some tumours of the central and peripheral nervouu system
urc noted (Fig. 34). Rewell and Willis (1 950) recorded a ganglioneuroma