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An Eskimo who had been treated for a nasopharyngeal carcinoma was subsequently found to have a rapidly progressive form of Kaposi's sarcoma confirmed at biopsy. No objective response was obtained by irradiation treatment of isolated nodules. However, vinblastine sulfate arrested the progression of the disease. Because this neoplasm is most prevalent in tropical climates its presentation in an Eskimo is believed sufficiently unusual to warrant this report.

A case of ectopic gonadotropin production by a bronchogenic carcinoma is presented. Eleven similar cases have been previously reported. Urine gonadotropin titres appeared related to the size of the tumour mass since they decreased with response to treatment and increased when the tumour started progressing again. The hormone is most probably elaborated and secreted by the tumour cells.

Three patients are reported in whom the diagnosis of neuroblastoma was made following electron microscopy of a bone marrow aspirate. The ultrastructure of neuroblastoma cells is distinctive, and they can be distinguished by electron microscopy from cells of the other tumors with which neuroblastoma is often confused by light microscopy. The rapidity with which the diagnosis can be obtained through use of this procedure argues for its adoption in any patient in whom the diagnosis is suspected and who has tumor cells in bone marrow. Early initiation of appropriate therapy is made possible, and elaborate diagnostic procedures may be avoided.