File:American quarterly of roentgenology (1909) (14570808208).jpg

Identifier: americanquarterl02amer (find matches)
Title: American quarterly of roentgenology
Year: 1909 (1900s)
Authors: American Roentgen Ray Society
Subjects: Nuclear Medicine Radiography Radiology Radiology
Publisher: Pittsburgh : American Roentgen Ray Society
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

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he primary or constant rinding in the active lesions inbone is that of localized dissolution. So intense and well-defined is this process that it results in the peculiar conditionin which cavities of completely dissolved bone lie immediatelyadjacent to spongy bone tissue apparently intact. The fringesof bone forming the walls of these cavities retain their fullcalcium content until with advancing necrosis they in turnare completely liquefied. Diffuse appearances in the neigh-borhood of a blastomycetic focus is the exception. These areas of total necrosis may be found singly or ingroups. If multiple they may coalesce as they increase insize with the formation of a single larger abscess. They mayappear anywhere in the structure of the short bones as thecarpus or tarsus, and here show the same tendency to affectneighboring bones and joints by direct extension as doestuberculosis. The affected bones, however, do not show thesame diffuse porosis and general decalcification as in tubercu- A
Text Appearing After Image:
x FIG. 2BLASTOMYCOSIS OF THE METACARPALS-hollister e. potter Potter: Radiographic Findings 245 losis but are more patchy in appearance, certain bony com-partments retaining their structural integrity to the last. Inthe long bones the foci appear as a rule in the spongy portionof the diaphysis immediately beneath the epiphyseal line, or,in the absence of an epiphysis, beneath the joint surface. Inone instance observed the focus probably developed withinthe epiphysis. The secondary finding of import is that of proliferation.Though frequently not seen, its presence and appearanceassist materially in identifying the nature of the process, andparticularly is this true in locations where the details of theedges of the focus are veiled by quantities of overlying boneor soft structures. In its typical form the proliferation is seenas a bony sheath partly or completely surrounding the end ofone of the long bones within which a focus is developing. Theproliferated bone is mature and homogeneous

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