Document 15k6zby85GxDJbM8dEGXa6XNq

728 OCCUPATIONAL TUMORS AND ALLIED DISEASES of congenital factors in the production of this systemic disease of the peripheral nerves (neurofibromatosis). Trauma plays a doubtful role in the causation of neurogenic sarcomas, according to Cutler and Quick, who obtained a traumatic history in 19.3 per cent of their cases (14 out of 72). Hartman stated that trauma cannot be considered as a true etiological factor in the production of these tumors, although it may be an activating one, while Coley and Higinbotham asserted that neurogenic sarcomas may have a traumatic origin. Neuromas, which are blastomatoid hyperplasias of Schwann's cells,, fibro blasts, and nerve fibrils, are the result of traumatic injuries to peripheral nerves (Faworsky). While they are observed most frequently as so-called amputation-neuromas in the stumps of amputated extremities, they are seen occasionally as painful, nodular formations in nerves previously exposed to some kind of trauma. BIBLIOGRAPHY Adler, Arch. f. Unfallh. 2: 189, 1898. Agostini, G., Ann. osp. psichiat. di Perugia 30: 19, 1936. Bailey, P., and Cushing, H., Tumours of the Glioma Group. Philadelphia, Lippincott, 1926. Beckmann, O., Deutsche Ztschr. f. d. ges. gerichtl. Med. 16: 26, 1930. Beneke, R., Ergebn. d. allg. Path. u. path. Anat. 26: 893, 1932. Klin. Wchnschr. 12: 112, 1933. Monatschr. f. Unfallh. 39: 49, 19325 40: 505, 1933. Bonome, A., Virchows Arch; f. path. Anat. 163: 441, 1901. Bramwell, E., Tumors of the Brain, in Oxford Medicine, New York, Oxford University Press, 6: 137, 1920. Bruns, L., Die Geschwiilste des Nervensystems. Berlin, S. Karger, 1908, p. 64. Bumke, O., and Krap, E., Infektionen und Intoxikationen II, in Handbuch der Neurologie, Bumke, O. and Foerster, O., Vol. Ill, Spezielle Neurologie, V, Riickenmark und Gehirn, III. J. Springer, Berlin, 1936. Coley, W. B.5 and Higinbotham, N. L., Ann. Surg. 98: 991, 1933. Cook, J. W., J.A.M.A. 111: i860, 1938. Cook, J. W., and Kennaway, E. L., Am. J. Cancer 33: 50, 1938. Courville, C. B., and Kimball, T. S., Arch. Path. 17: 10, 1934. Cox, L. B., Med. J. Australia 1: 256, 1939. Cushing, H., Intracranial Tumors, in Osier, W., Modern Medicine, Philadelphia, Lea & Febiger 6: 222, 1928. Cutler, M., and Quick, D., Ann. Surg. 86: 810, 1927. Daels, F., and Biltris, R., Bull. Assoc, franc, p. l'etude du cancer 20: 32, 1931. Dammer, M., Med. Klin. Wien. 26: 1286, 1930. Deery, E. M., Bull. Neurol. Inst. New York 2: 157, 1932. Dietrich, A., Ztschr. f. Krebsforsch. 42: 251, 1935. Durck, H., Verhandl. d. deutsch. path. Gesellsch. 17: 369, 1914. Klin. Wchnschr. 3: 657, 1924. Enokow, I., Dermat. Wchnschr. 97: 1061, 1933. Esser, A., Arch. f. orthop. u. Unfall-Chir. 33: 10, 1933. Monatschr. f. Unfallh. 40: 385, 1933. Ewing, J., Neoplastic Diseases. 3rd ed., Saunders & Co. Philadelphia, 1928. Arch. Path. 19: 690, 1935. Faworsky, B. A., Ztschr. f. d. ges. Neurol, u. Psychiat 139: 399, 1932. Fischer-Wasels, B., Monatschr. f. Unfallh. 39: 489,. 1932. Tumoren, in Liniger, H., Weichbrodt, R., and Fischer, A. W., Handbuch der arztlichen Begutachtung. Vol. I p. 347, J. A. Barth, Leipzig, 1931. Foerster, O., and Gagel, O., Ztschr. f. d. ges. Neurol, u. Psychiat. 138: 339, 1932.