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Immunohistochemical demonstration of S 100 protein in malignant melanoma and pigmented nevus, and its diagnostic application
Author(s) -
Nakajima Takashi,
Watanabe Shaw,
Sato Yuichi,
Kameya Toru,
Shimosato Yukio,
Ishihara Kazuyuki
Publication year - 1982
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(19820901)50:5<912::aid-cncr2820500519>3.0.co;2-u
Subject(s) - s100 protein , melanoma , immunostaining , immunohistochemistry , pathology , medicine , melanin , amelanotic melanoma , stain , melanocyte , nevus , staining , biology , cancer research , genetics
The presence of nervous tissue specific S100 protein was studied immunohistochemically in 47 cases of malignant melanoma and 25 pigmented nevi of various types by peroxidase‐antiperoxidase immunoenzyme method on routine paraffin sections of the surgical specimens. Of 47 cases of malignant melanoma, 44 were positively stained for S100 protein. The intensity of S100 protein immunostaining was suggested to be inversely proportional to the amount of melanin pigment. In ten cases of 12 amelanotic melanomas, the immunoreaction for S100 protein in tumor cells was stronger than that of normal Bergmann glial cell in human cerebellum. Intradermal nevi and juvenile melanomas were strongly positive for S100 protein, but blue nevi contained little or no S100 protein. Our results suggest that S100 protein is widely distributed among melanotic tumors and is also a very useful diagnostic indicator for malignant melanoma, especially of the amelanotic type.