ISSN:
1432-0878
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Epidermal cells of normal fin web and of the epidermal papilloma of the flathead sole, Hippoglossoides elassodon, were compared by light and electron microscopy. The predominant cells of normal epidermis are squamous and are characterized by complex microvillous interdigitations between adjacent cells, numerous desmosome-like structures, terminal bars, prominent cytoplasmic filaments, and blunt, broad-based microvilli on the outer (free) surfaces of the superficial cells. The less numerous mucous cells of normal epidermis possess abundant ergastoplasm and mucus-filled vacuoles, but lack desmosome-like structures and cytoplasmic filaments. In contrast, in the epidermal papilloma, mucous cells are absent; and the tumor cells are without microvilli, desmosome-like structures, cytoplasmic filaments, and conspicuous ergastoplasm. The papilloma cells are in addition characterized by certain features not seen in normal epidermis, including prominent nuclear “pores”, very large nucleoli, nuclear dense bodies, vesicular mitochondria with few cristae and dense internal granules, and three types of distinctive cytoplasmic particles of possible viral nature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00325319
