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Biomedical subjects

D J Perry

Publications and source records attributed to D J Perry.

90 records · Page 5Linked to original sources
PubMed1983

Induction chemotherapy with vinblastine, bleomycin, and cis-diamminedichloroplatinum in squamous cell carcinoma of the head and neck.

The results of induction chemotherapy with vinblastine, bleomycin, and cis-platinum II are reported. No survival advantage was seen when the entire treatment group was compared with an historical control group. Special attention is directed to the meaning of complete response and the potential treatment options and survival advantages of the complete responders subgroup.

Adolescent↗
PubMed1983

Methyl-CCNU, 5-fluorouracil, vincristine, and streptozocin (MOF-STREP) in metastatic colo-rectal carcinoma.

Forty patients with metastatic colorectal carcinoma who had received no prior chemotherapy were entered onto a trial of methyl-CCNU, 5-fluorouracil, vincristine, and streptozocin (MOF-STREP). Ten of 40 (25%) responded. Two patients (5%) achieved a complete response and eight patients (20%) a partial response. In addition, 10 patients previously treated with chemotherapy received the MOF-STREP regimen; 1 of 10 (10%) responded. The duration of the complete responses were 5 and 16 mo, respectively. The median duration of the partial responses was 4 mo with a range of 1-16 mo. The median survival of the 11 responders was 14 mo. Median survival of the 39 nonresponders was 5 months. Responders lived significantly longer than nonresponders (p = 0.03, log-rank). Toxicity was severe with nausea and vomiting common after streptozocin and myelosuppression requiring dose reductions in 70% of patients. We compare our findings using this regimen to those of two previously reported trials.

Adult↗
PubMed1983

Phase II trial of mitoguazone in patients with advanced squamous cell carcinoma of the head and neck.

We used mitoguazone (500 mg/m2 iv weekly, with 50-mg/m2 escalations weekly as tolerated) to treat 22 patients with squamous cell carcinoma of the head and neck which recurred after initial therapy. Nine of 22 (11%) patients responded: two had complete responses and seven had partial responses. Gastrointestinal toxicity and anemia were commonly seen. We conclude that mitoguazone is active in squamous cell carcinoma of the head and neck and should be incorporated into phase III trials.

Adult↗
PubMed1983

Radiation as salvage therapy for patients with Hodgkin's disease relapsing after MOPP (mechlorethamine, vincristine, prednisone, and procarbazine) chemotherapy.

Six patients with Hodgkin's disease who failed MOPP (mechlorethamine, vincristine, prednisone, and procarbazine) chemotherapy, with recurrences confined to lymph node areas, are reported. All patients were treated with tumoricidal doses of irradiation in mantle, inverted Y, or whole-abdominal fields. All six patients achieved complete remission, with minimal toxicity. Disease-free survival ranged from 3 to 38 months, with four patients remaining in complete remission at 9, 15, 27, and 38 months. Radiation therapy should be considered in patients failing MOPP chemotherapy with lymph node disease.

Drug Therapy, Combination↗
PubMed1982

Vinblastine, bleomycin and cisplatin for recurrent or metastatic squamous cell carcinoma of the head and neck.

Forty-two patients with recurrent or metastatic squamous cell carcinoma of the head and neck were treated with vinblastine, bleomycin, and cisplatin. All patients had received prior surgery, radiation or chemotherapy and all had measurable disease. Forty-five percent of the patients responded with a median duration of response of eight months and median survival of nine months. Six patients (14%) were complete responders and had a median duration of response of 12 months and median survival of 24+ months. Thirteen patients (31%) were partial responders and had a median duration of response of seven months and survival of 13 months. Toxicity was mild with nausea and vomiting occurring in all patients after cisplatin. There were two cases of bleomycin-induced pulmonary fibrosis and two cases of mild renal insufficiency (creatinine clearance level, 45 cc/min). This regimen compares favorably with other published regimens for advanced head and neck cancer.

Bleomycin↗
PubMed1982

T-cell lymphoma occurring in the oropharynx.

Two cases of documented T-cell lymphoma occurring in the oropharynx are described. Both patients presented with cervical lymphadenopathy and involvement of oropharyngeal tissues. Although classification of these patients' lesions in relation to other known T-cell lymphomas was difficult, the location of the lesions in both cases and certain morphologic features in one case at least suggested that the malignant cells may have arisen from peripheral T-lymphocytes. In both patients, the neoplastic cells showed a tendency to impinge upon the oral epithelium, in keeping with the pattern of involvement of epithelial tissues seen in several varieties of T-cell lymphoproliferative disorders. The possibility that these oropharyngeal T-cell lymphomas may represent a distinct type of T-cell neoplasm is raised.

Humans↗
PubMed1980

Statistical analysis of beta 2-microglobulin levels in sera of lung and GI tract cancer patients.

Two radioimmunoassay methods were used to determine levels of beta 2-microglobulin in sera of lung and GI tract tumor patients (benign and malignant), as well as of normal individuals. Two screening sera panels were provided by the National Cancer Institute for this purpose. Statistical analysis of the results (performed by an independent institution) of the two panels provided discrepant results. This study points to the need of careful evaluation of results obtained by screening for any potential tumor marker.

Adolescent↗
PubMedDate not supplied

Examination of the factors Ac and Aeq for cylindrical ion chambers used in cobalt-60 beams.

The calibration of a cobalt-60 beam in a phantom with an ion chamber, which has been calibrated with respect to exposure, requires the use of a displacement correction factor which essentially corrects the photon fluence for the attenuation and scatter when the chamber with buildup cap is removed and replaced by phantom material. To determine the displacement factor, Ac, a special set of cylindrical ionization chambers with various volumes were constructed out of polystyrene. Tissue-air ratios were measured with these chambers for cobalt-60 gamma rays in a polystyrene phantom, and the ratio Ac/Aeq was experimentally determined. In order to calculate Ac from this ratio, Aeq was determined also. It was found that Ac depended on chamber diameter only, and not on field size or depth. A value of 0.990 for Aeq is recommended and a table of Ac for chambers of different outer diameters is included.

Cobalt Radioisotopes↗
PubMedDate not supplied

A model for calculating the effects of small inhomogeneities on electron beam dose distributions.

Charged particles penetrating a medium are repeatedly deflected from their line of motion by coulomb interactions with target nuclei. This physical feature should be included in the calculation of dose distributions when the irradiated medium contains small inhomogeneities. We use the mean path taken by particles in homogeneous media to represent their motion through inhomogeneous materials. This procedure adapts wht small angle multiple scattering formalism to yield manageable, approximate solutions when a medium contains arbitrarily composed inhomogeneities. To promote the development of this procedure into an electron beam treatment planning program, we discuss the salient features which arise in connection with electron beam inhomogeneity calculations. We use a solid phantom containing an air cavity just below its surface as a particular example of a small inhomogeneity. We discuss qualitatively and quantitatively the dose distributions which result from their irradiation with an 11-MeV electron beam.

Humans↗