sella (sel´a)

saddle (1) [L. saddle]
empty s.a sella turcica, often enlarged, that contains no discernible pituitary gland; may be primarily due to an incompetent sellar diaphragm with compression of the pituitary gland by herniating arachnoid or secondarily due to surgery or radiotherapy.
s. tur´cica [NA] a saddle-like bony prominence on the upper surface of the body of the sphenoid bone, constituting the middle part of the butterfly-shaped middle cranial fossa; it includes the tuberculum sellae anteriorly and the dorsum sellae posteriorly; with its covering of dura mater it constitutes the hypophysial fossa which accommodates the hypophysis or pituitary sellaris, Turkish saddle;


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