Roentgen diagnosis of diseases of the head . egion of the sella. As Erdheim has shown,the hypophyseal fossa becomes evenly enlarged in all diametersby the true hypophyseal tumors developing within the sella, INTRACRANIAL DISEASES 163 while those tumors of the second group, developing above thesella, widen only the entrance to the fossa. As simple as this dif-ferentiation is, still manifold variations in detail result from thenature, the size, and the direction of the growth of the the explanation of these, the numerous roentgen examina-tions of the last few years have furnished valua
Roentgen diagnosis of diseases of the head . egion of the sella. As Erdheim has shown,the hypophyseal fossa becomes evenly enlarged in all diametersby the true hypophyseal tumors developing within the sella, INTRACRANIAL DISEASES 163 while those tumors of the second group, developing above thesella, widen only the entrance to the fossa. As simple as this dif-ferentiation is, still manifold variations in detail result from thenature, the size, and the direction of the growth of the the explanation of these, the numerous roentgen examina-tions of the last few years have furnished valuable we discuss this in detail we will speak of the normalsella as it appears in the The following somewhat schematic figures are drawn accord-ing to the roentgenograms taken with the head in a transverseposition, that is, the head is laid on the plate so that the medianplane is parallel to it and the tube is focused over the middlepoint between the external orbital margin and the externalauditory FCP. y^ir^J Fig. 33.—Sketch of a profile roentgenogram of a normal sella in an adult. O. Roofof orbit. PS. Planum sphenoidale. SC. Sulcus chiasmaticus. T. Tuberculum Anterior clinoid processes. MCF. Outline of middle cranial fossa. 55. Pos-terior wall of the sphenoidal • F. Floor of the sella. PCP. Posterior clinoidprocesses. D. Dorsum sellae. Fig. 33 is a drawing of the roentgenogram of the normalsella turcica of a twenty-four-year-old man. The floor of thesella (F) forms a semicircle 13 mm. in diameter and is 1 The dorsum sella? (D) is 7 mm. high and 2 mm. tuberculum sella? (T) stands out bluntly and passes overwith a slight bend representing the sulcus chiasmaticus ()into the straight line () representing the projectionof the planum sphenoidale. The contour of the anterior clinoidprocesses {) stands out as a pointed arch. The distance 4According to Fitzgerald the length of the skull base
Size: 2150px × 1163px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecthea, booksubjectskull
