In a recent survey of the reported cases of intracranial dermoid tumors, Broager1 stated that 62 verified cases are on record and that, of these, operation was performed in only 19. At the same time he reported that the larger series of dermoid and epidermoid tumors indicate that the latter are approximately four times as common as the former. In view of these facts, it seems important to put on record 4 cases of intracranial dermoid tumors and 1 case of epidermoid tumor (an exact reversal of Broager's ratio), in all of which operation was successfully performed, selected from a total of well over 700 verified cases of intracranial tumors.
It is not the purpose of this paper to review the statistics on all reported cases of intracranial dermoid and epidermoid tumors or to deal widely with the histology, clinical symptoms and surgical problems of such tumors. These matters
JOHN M, DAVIS L. INTRACRANIAL DERMOID AND EPIDERMOID TUMORS. Arch NeurPsych. 1943;49(1):56-70. doi:10.1001/archneurpsyc.1943.02290130064007