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Biomedical subjects

R J Papac

Publications and source records attributed to R J Papac.

At least 37 records · Page 2Linked to original sources

Origins of cancer therapy.

This is a brief overview of the development of cancer therapy with a focus on systemic therapy. The modern era of chemotherapy developed at Yale University Medical School during World War II, a fact that has been generally unrecognized until recently. The observations preceding and involved in the discovery of effective drugs for cancer seem particularly pertinent for this anniversary year.

Antineoplastic Agents↗

Renal cell carcinoma: analysis of 31 cases with assessment of endocrine therapy.

Thirty-one patients with locally extensive and metastatic renal cell carcinoma were observed over an eight year period. At onset of the disease, symptoms due to metastatic deposits were the most frequent mode of presentation, followed by manifestation of local tumor growth (hematuria, flank pain or palpable mass) and paraneoplastic syndromes. Hormonal therapy with testosterone propionate, a progestational agent or both was assessed in 21 cases. Five instances of tumor regression, two involving recalcification of lytic osseous metastases, were documented. Endocrine studies to elucidate possible mechanisms of hormonal effectiveness were carried out in seven cases. Median survival from diagnosis was ten months. Following the rapid early mortality, a very gradual decrease in survival occurred, with 25% alive at ten years. Factors influencing survival include the duration of the interval between diagnosis of the primary tumor and appearance of metastases and the association of certain paraneoplastic syndromes.

Adenocarcinoma↗

Chemotherapy of lung cancer.

The potential for substantial improvement in the outcome of patients with carcinoma of the lung seem most likely to develop in the field of chemotherapy. In the past decade, striking advances in the management of small cell carcinoma have yielded response rates and longer survival. While the greatest improvement can be predicted for patients whose disease is limited in extent, combination chemotherapy and combined modality therapy generally are effective in causing tumor regression for the majority of patients. About 20 percent of patients with disease limited to the thorax and lymph nodes will survive two years. In non-small cell tumors, response rates are improved with intensive drug combinations, although the majority of cases are unresponsive to present regimens. Careful staging and evaluation of patients indicates that patients with good performance status and limited extent of disease appear to obtain the most benefit from intensive treatment. The considerable morbidity of some treatments often influences the choice for or against chemotherapy in patients with non-small cell carcinomas. For the future, problems of particular interest will be in investigation of factors-biologic, pharmacokinetic, immunologic-that are related to the failure to cure small cell carcinoma, the most therapeutically responsive pulmonary tumor. Additionally, in the non-small cell tumors, more effective therapies as well as clarification of the basis for relative resistance to cytotoxic agents are areas for intensive investigation.

Carcinoma, Bronchogenic↗