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3H-thymidine autoradiography of CSF cells in primary reticulum cell sarcoma of the brain

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Summary

CSF cells in a case of primary reticulum cell sarcoma of the brain with diffuse subarachnoid spreading were examined by 3H-thymidine autoradiography. Immediately after lumbar puncture, the CSF withdrawn was incubated at 37°C for 1 hr with an admixture of 3H-thymidine at a rate of 1 μCi/ml CSF. The cells were collected by centrifugation and the microautoradiographic procedure was performed. The labeling index (L.I.) of the total CSF cells was 10.5%, and when non-neoplastic cells, i.e. polymorphonuclear leukocytes, small lymphocytes, monocytes etc., were excluded, the real L.I. of the tumor cells in the CSF was supposed to be more than 14.4%. Referring to the results of various brain tumors reported in the literature, this belongs at least to the highest labeling group. The high L. I. of the tumor cells in this case was well consistent with the extremely rapid clinical course. It should be stressed that the examination of CSF cells by 3H-thymidine autoradiography in cases of brain tumors could be one of the valuable methods indicating the DNA synthesis of the tumor cells, which is an important parameter of malignancy.

Zusammenfassung

Liquorzellen in einem Fall von primärem Reticulumzellsarkom des Gehirns mit diffuser subarachnoidealer Ausbreitung wurden mit 3H-Thymidin-Autoradiographie untersucht. Sofort nach der Lumbalpunktion wurde der entnommene Liquor bei 37°C für 1 Std mit 3H-Thymidin inkubiert. Die Zellen wurden durch Zentrifugation gesammelt, und ein mikroautoradiographisches Verfahren wurde ausgeführt. Der Markierungsindex der gesamten Liquorzellen wurde mit 10.5% errechnet. Wenn nichtneoplastische Zellen, d. h. Granulocyten, Monocyten, Lymphocyten usw., ausgeschlossen wurden, dann betrug der echte Markierungsindex der Tumorzellen im Liquor mehr als 14.4%. Der Index entspricht somit den höchsten von den in der Literatur berichteten Markierungen bösartiger Gehirntumoren des Menschen. Der hohe Markierungsindex dieses Tumors entsprach dem außerordentlich rasch progredienten klinischen Bild. Es wird hier betont, daß die Untersuchung der Liquorzellen bei Gehirntumoren mit 3H-Thymidin-Autoradiographie für eine Beurteilung der Fähigkeit der DNS-Synthese der Tumorzellen verwendet werden kann, und damit einen Hinweis auf die Malignität gibt.

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Fukui, M., Yamakawa, Y., Yamasaki, T. et al. 3H-thymidine autoradiography of CSF cells in primary reticulum cell sarcoma of the brain. J. Neurol. 210, 143–150 (1975). https://doi.org/10.1007/BF00316241

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