[DNA cytophotometry on cells of dermatofibrosarcoma protuberans (author's transl)]

Determination of DNA content was performed by Feulgen staining of tumour cell smears and DNA measurement with an integrating microdensitometer, In 3 cases of Dermatofibrosarcoma protuberans there was a DNA distribution in the range of 2 c: only a few cells showed a DNA content in the range between 2 c and 4 c; no atypical DNA distribution curves were found. The rate of proliferation in these cases of Dermatofibrosarcoma protuberans is small, there are no cytophotometric indices for malignancy.