Dear Colleagues, One of our patrons is asking for this article: Jaffe HL, Lichtenstein L, Portis RB. GCT of bone, its pathological appearance, grading, supposed variants and treatment. Arch Pathology 1940; 30:993. Although it has been cited by several authors I could not checked t he reference so I hope the data is correct. Any help will be very welcome! Thanks in advance.