Induction of Metastasis of Frog Carcinoma by Increase of Environmental Temperature
نویسندگان
چکیده
Metastasis of the kidney carcinoma of leopard frogs (Rana pipiens) has been induced by exposing tumor-bearing animals for approximately 50 days to a constant temperature of 28 degrees C. Under these conditions 54 per cent of the frogs developed secondary growths, whereas in groups kept at 18 degrees or at 7 degrees metastatic dissemination was found in only 6 per cent. Moreover, at the elevated temperature the metastases were usually more numerous and more widely disseminated; they were also fairly uniform in size, suggesting that they had developed at nearly the same time. Dissemination of the kidney tumors was influenced by the nutritional state of the frogs, occurring more readily in well nourished than in poorly nourished animals. Periodic Roentgen ray examinations showed that the size of the primary tumors was not significantly or uniformly affected during the course of the experiments. No correlation was found between change in size of the kidney tumors and the incidence of their metastasis. Although the mechanism by which temperature induces metastasis of frog carcinoma cannot as yet be elucidated, previous experiments with this tumor indicate that certain factors at least may be involved: Elevation of temperature has been found to cause more ready detachment of cells of frog carcinoma in tissue culture; to bring about increased velocity of locomotion of the detached cells; to lead more promptly and efficiently to vascularization of transplants; and to effect their greater invasiveness.
منابع مشابه
Significance of histopathological features of breast carcinoma and its correlation for desision of future therapy
Breast cancer is one of the most common malignancies among women and considered as the first caise of mortality in females suffering from malignant processes.axillary lymph node metastasis (ALNM)is the most important predictor of survival in patient with breast carcinoma.the purpose of this study was to determine the association between the incidence of ALNM and morphologic criteria by univaria...
متن کاملThe Cytology of Subcutaneous Chest Wall Metastasis Originating from Bronchiolo- Alveolar Carcinoma
Bronchiolo-alveolar carcinoma with subcutaneous chest wall metastasis is a very rare presentation. A case of 36- year-old male with metastatic subcutaneous chest nodule of bronchiolo-alveolar carcinoma, diagnosed by fine needle aspiration cytology, is reported here. Cutaneous metastases are of diagnostic importance because they may be the first manifestation of an undiscovered internal malig...
متن کاملThree cases of pleural metastasis of renal clear cell carcinoma diagnosis: cases report
Background: Malignant pleural effusion is common in patients with advanced malignant tumor. The aim of this study is to analyze the characteristics of pleural metastasis of renal clear cell carcinoma, pleural effusion under medical thoracoscopy and the diagnostic value of interventional thoracoscopy-guided biopsy, and to improve the understanding of pleural metastasis of renal clear cell carcin...
متن کاملLung Carcinoma Metastasis to the Distal Part of Index Finger: A Case Report
Although acrometastases are rare but clinically they are considered important. Their etiology is quite different from the metastases to other sites; bronchogenic carcinoma is by far the most frequent case. The prognosis is always similar to metastatic bronchial cancer with an average survival of three mo...
متن کاملRenal Medullary Carcinoma; A Rare Entity
AbstractRenal medullary carcinoma (RMC) is an uncommon aggressive neoplasm of the kidney. RMC is biologically aggressive with a very poor prognosis, and metastasis is seen in up to 95% of the patients at diagnosis or shortly thereafter. The common sites of metastasis are respectively lymph nodes, lungs, livers, and adrenal glands in order of frequency. The presence of poorly differentiated eosi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- The Journal of Experimental Medicine
دوره 89 شماره
صفحات -
تاریخ انتشار 1949