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April 1948

EROSION OF THE ANTERIOR CLINOID PROCESSES SIMULATING THAT DUE TO INTRASELLAR TUMOR: A Diagnostic Pitfall

Arch NeurPsych. 1948;59(4):523-528. doi:10.1001/archneurpsyc.1948.02300390080011
Abstract

THERE HAS always been some mystery connected with the changes in the anterior clinoid processes caused by intracranial tumors. It is frequently difficult to distinguish roentgenographically the sellar changes due to an intrasellar tumor from those due to a suprasellar tumor or to generalized increase in intracranial pressure. The anterior clinoid processes are really lateral to the pituitary body and may not be eroded by early enlargement of this gland.1 However, Twining2 suggested that such growths press the internal carotid arteries against these bony structures, which are worn away by the water hammer of the pulse, and not by the direct pressure of the tumor itself.

Roentgenographic study of a recent case revealed enlargement of the sella turcica and hollowing of the under surface of each anterior clinoid process. These observations seemed to indicate that there was an enlarging mass within the sella. Otherwise, how could the inferior

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