title: [A study on reduction rate of tumor volume by irradiation in germinoma, malignant lymphoma, and medulloblastoma].
abstract: A relationship between radiation dose and reduction rate of tumor volume was studied in 10 patients with germinoma, nine with malignant lymphoma, and seven with medulloblastoma, in order to evaluate the effect of irradiation on these tumors. Germinomas showed either mono- or biphasic reduction of the volume with increased radiation dose in semi-logarithmic expression, irrespective of their size. All patients are well without relapse except for one that was lost because of transfer. The reduction rate of tumor volume was slightly less in malignant lymphomas and medulloblastomas than that in germinomas and the former two showed less uniformity of response to irradiation according to each case. Malignant lymphomas tended to regrow during irradiation period or early after the period and the effect of irradiation seemed to be related to the size of the tumor. Medulloblastomas did not completely disappeared during irradiation period, but delayed effect of irradiation was recognized after the period.
authors.affiliation: Department of Neurosurgery, Tokyo Medical and Dental University, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ohno
authors.forename: R
authors.initials: R
authors.lastname: Suzuki
authors.forename: H
authors.initials: H
authors.lastname: Masaoka
authors.forename: S
authors.initials: S
authors.lastname: Tomida
authors.forename: T
authors.initials: T
authors.lastname: Arai
authors.forename: T
authors.initials: T
authors.lastname: Maehara
authors.forename: J
authors.initials: J
authors.lastname: Saito
authors.forename: K
authors.initials: K
authors.lastname: Hirakawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000532:radiotherapy*; D002528:Cerebellar Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000532:radiotherapy*; D002648:Child; D004407:Dysgerminoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000532:radiotherapy*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008223:Lymphoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000532:radiotherapy*; D008297:Male; D008527:Medulloblastoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000532:radiotherapy*; D008875:Middle Aged; D011879:Radiotherapy Dosage; D012074:Remission Induction; D014057:Tomography, X-Ray Computed