A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . tumor consists of an internal hydrocephalusexpanding and forcing outward the ventricular walls;and, finally, an encephalocele, composed wholly ofbrain substance with more or less fluid usuallysurrounding it. These tumors are mostly of congenital origin, butthere are certain rare cases in which they are acquiredafter birth, through disease of the cranial bones ortraumatism. It is usual, therefore, to distinguish twoforms of cephalocele, the congenital and the acquir
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . tumor consists of an internal hydrocephalusexpanding and forcing outward the ventricular walls;and, finally, an encephalocele, composed wholly ofbrain substance with more or less fluid usuallysurrounding it. These tumors are mostly of congenital origin, butthere are certain rare cases in which they are acquiredafter birth, through disease of the cranial bones ortraumatism. It is usual, therefore, to distinguish twoforms of cephalocele, the congenital and the describing the latter it wiU be best to use the prefixpseudo. Under this heading may also be included the de-cotnprcssinn cephalocele following palliative operationsfor the relief of increased intracranial pressure; as intumor and acquired internal hydrocephalus. Congenital Cephalocele.—These tumors almostalways have their peduncles at or in the immediateneighborhood of some cranial suture. The great ma-jority are in the anteroposterior median line, as a ruleeither in the frontal or in the occipital region. .Accord-. Fig. 1275.—Nasofrontal Cephalocele. (Pfandler u. Schlosamana,Handbuch der Kinderheilkunde, 1906.) ing to Giovanni Reale, who collected 68 cases of ceph-alocele, 10 were at the nasal root, 9 in the frontal suture,5 at the posterior fontanelle, and 22 in the occipitalbone, the rest arising from some of the lateral tabulated 85 cases, 44 of which were occipital,and 41 frontal or sincipital. The favorite location ofthe sincipital tumors is at the root of the , either atthe inferior part of the frontal suture or at the junc-tion of the ethmoid and frontal bones. (Fig 1.) Thehernial canal or opening is generally boimded by theseparated or more or less malformed ethmoid, frontal,nasal, or lacrymal bones, and sometimes even bythe nasal process of the superior maxilla. Fenger,in an article entitled Basal Hernias of the Brain, de-scribes such si
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