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—Allow me to call attention to two points in the paper by Dr. R. Harvey Reed, on "Hydatid Tumor of the Brain," published in the Journal of July 4th. (1) The term hydatid tumor should be, and usually is, limited to the echinococcus cyst, the larvæ of the Tænia echinococcus or Hydatid tapeworm. The terms "cysticercus" or "measle" should be used in describing the larva of the Tænia solium. (2) The cases reported by Dr. Reed cannot as they stand be accepted as instances of hydatids or of cysticerci. The description of the cysts is too meagre, and a microscopical examination does not appear to have been made, without which it is in many cases impossible to determine the parasitic nature. From the position of the cysts in the lateral ventricles in each case, it seems probable that Dr. Reed has been dealing with the not uncommon hydatidiform cysts
Osler W. HYDATID TUMORS OF THE BRAIN. JAMA. 1885;V(3):83. doi:10.1001/jama.1885.02391030027010
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