Kusewitt DF, Reece RL, Miska KB. S-100 immunoreactivity in melanomas of two marsupials, a bird, and a reptile.
Vet Pathol 1997;
34:615-8. [PMID:
9396143 DOI:
10.1177/030098589703400610]
[Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
S-100 proteins are abundant in melanocytes of the skin; thus, S-100 immunoreactivity has been used as a diagnostic criterion for melanoma in humans and other placental mammals. We tested cutaneous melanomas of two marsupials, a bird, and a snake for S-100 immunoreactivity, using a polyclonal rabbit antibovine S-100 antibody. The tumor from a Tasmanian Pademelon (Thylogale billaridierii) was composed of large epithelioid cells, most of which had S-100-positive cytoplasm. In general, there were only scattered individual spindle-shaped S-100-positive cells or groups of cells in the primary mass from a Spotted-tailed Quoll (Dasyurus maculatus); S-100 staining was primarily nuclear. Cells comprising the melanomas of the Australian Cormorant (Phalacrocorax carbo) and the Death Adder (Acanthophis antarcticus) were S-100-negative, although peripheral nerve bundles in both were S-100-positive.
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