PURPOSE: To investigate the effects of radiation dose-escalation on the treatment outcome, complications and the other prognostic variables for glioblastoma patients treated with 3D-conformal radiotherapy (3D-CRT). MATERIALS AND METHODS: Between Jan 1997 and July 2002, a total of 75 patients with histologically proven diagnosis of glioblastoma were analyzed. The patients who had a Karnofsky Performance Score (KPS) of 60 or higher,...

PURPOSE: Hypopharyngeal cancer is diagnosed at the advanced stage in most cases, which the prognosis known to be poor. Thus, the efficacy of induction chemotherapy followed by radiotherapy, with regards to the response and survival rate for stage IV hypopharyngeal cancer patients, was examined. MATERIALS AND METHODS: From July 1998 to February 2000, 18 cases were diagnosedas AJCC stage IV hypopharyngeal cancer...

PURPOSE: This study was carried out to confirm clinical values and limitations of postoperative radiotherapy for hypopharyngeal carcinoma, to evaluate various prognostic factors which may affect to the treatment results and to use these results as fundamental data for making a new treatment strategy. METHODS AND MATERIALS: A retrospective analysis was performed on 64 previously untreated patients with squamous cell carcinoma...

PURPOSE: To evaluate the effectiveness of postoperative radiation therapy in cervical cancer patients and define the prognostic factors to affect survival rates. MATERIALS AND METHODS: Eighty one patients with cervical cancer who were treated with postoperative radiation therapy following surgery at our institution between May 1992 and April 2000 were retrospectively analyzed. Forty two patients had stage IB disease, 17 had...

PURPOSE: The object of this study is to investigate sociodemographic and clinical characteristics, psychology, self-esteem and quality of life in cancer patients on radiation therapy and to provide useful information for therapeutic approach to cancer patients on radiation therapy. MATERIALS AND METHODS: The subjects were 36 patents who had been treated with radiation therapy and 20 normal people. Sociodemographic information and clinical...

PURPOSE: This study was carried out to determine the protective effects of vitamin C on the hepatotoxicity induced by radiation. MATERIALS AND METHODS: The Spraque Dawley rats were randomly divided into 3 groups; the control group, the radiation exposed group, and the radiation and vitamin C-treated group. SOD activity, catalase, malondialdehyde and liver enzymes were analyzed to assess the antioxidant effects...

PURPOSE: The aims of this study were to evaluate the change of [18F]fluoromisonidazole ([18F]FMISO) uptake in C3H mouse squamous cell carcinoma-VII (SCC-VII) treated with mild hyperthermia (42oC) and nicotinamide and to assess the biodistribution of the markers in normal tissues under similar conditions. METHODS AND MATERIALS: [18F]FMISO was producedby our hospital. Female C3H mice with a C3H SCC-VII tumor grown on...

PURPOSE: The purpose of this study was to identify Radiosensitivity of proteins in tissues with different radiosensitivity. MATERIALS AND METHODS: C3H/HeJ mice were exposed to 10 Gy. The mice were sacrifiud 8 hrs after radiation. Their spleen and liver tissues were collected and analyzed histologicaly for apoptosis. The expressions of radiosusceptibility protein were analyzed by 2-dimensional electrophoresis and matrix-assisted laser desorption ionization...

PURPOSE: The purpose of this work was to study the differences of cyclooxygenase (COX-2) expression between Korean and Caucasian patients with early-onset breast carcinoma by immunohistochemistry. The test were analyzed to find a correlation between COX-2 and other biomarkers including HER-2/neu amplification, because we previously reported that a significant difference had been found in the expression of HER-2/neu between the...

PURPOSE: In radiotherapy of tumors in liver, enough planning target volume (PTV) margins are necessary to compensate breathing-related movement of tumor volumes. To overcome the problems, this study aims to obtain patients' body movements by using a moving phantom and an ultrasonic sensor, and to develop respiration gating techniques that can adjust patients' beds by using reversed values of the...