The pathology and surgical treatment of tumors . yer of cartilage often remainson the surface of the tumor, Osteomata have been found upon theinner surface of nearly all the cranial bones, but more especially uponthe frontal. Endocranial osseous tumors, when they reach consider- OSTEOMA. 433 able size, disturb the function of the brain by causing irritation andpressure-atrophy, which are frequently manifested by well-defined focalsymptoms. Frontal Sinus.—Osteomata of the frontal sinus belong to thetuberous variety. Their origin from islands of persistent cartilage hasbeen described fully by J.
The pathology and surgical treatment of tumors . yer of cartilage often remainson the surface of the tumor, Osteomata have been found upon theinner surface of nearly all the cranial bones, but more especially uponthe frontal. Endocranial osseous tumors, when they reach consider- OSTEOMA. 433 able size, disturb the function of the brain by causing irritation andpressure-atrophy, which are frequently manifested by well-defined focalsymptoms. Frontal Sinus.—Osteomata of the frontal sinus belong to thetuberous variety. Their origin from islands of persistent cartilage hasbeen described fully by J. Arnold. An interesting specimen represent-ing an osteoma in this locality (Figs. 303, 304) is preserved in themuseum of the Royal College of Surgeons, London. Many of thesetumors extend into the orbit, and others sometimes enter the cranialcavity through the orbital roof. The tumor in this locality sometimesattains a very large size, growing externally and in the direction ofthe cranial cavity. One of the largest specimens of this kind is in. Fig. 305.—Osteoma of the frontal sinus (after Paget). the Museum of the University of Cambridge, England. Clark, whoexamined this tumor, found in the hardest parts neither Haversiancanals nor lacunae; in the less hard parts the canals were very largeand the lacunae were not arranged in circles around them ; and every-where the lacunae were of irregular or distorted forms. In a caseexamined by Turner the bony growth from the inner table and orbitalplate of the left frontal bone, which had a knotted, irregular, cerebralsurface, caused a considerable indentation in the anterior part of theleft frontal lobe of the cerebrum. In the absence of suppurative in-flammation of the frontal sinus the presence of the tumor is indicatedby an expansion of the anterior wall of the sinus and by displacementof the eye if the tumor has extended in the direction of the and focal symptoms would point to the extension of thetumor toward the c
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectneoplas, bookyear1895
