Pituitary Colloid Cyst

Abstract

Colloid cysts appear most commonly in the third ventricle, their occurrence in the sellar region is uncommon. The authors report a female patient with a pituitary colloid cyst. She was diagnosed incidentally with a sellar lesion by a routine paranasal computed tomography examination performed for planning of a dental implant surgery. Radiologic examinations revealed a pituitary lesion that was removed by transnasal transsphenoidal route. Her pathologic examination revealed that the lesion was a colloid cyst. Although rare, colloid cysts should be considered in the differential diagnosis of pituitary lesions

Sellar colloid cyst: Peculiar radiological characteristics of a common lesion at an uncommon location

“…Colloid cysts are usually found within the ventricular system, particularly the roof of third ventricle. [ 3 ] Extraventricular involvement is rare and includes optic chiasm, olfactory groove, pituitary gland, fourth ventricle, cerebellum, brainstem, cerebral hemisphere, and velum interpositum. [ 5 ] Histopathologic examination is the standard diagnostic method showing an outer fibrous capsule and an inner lining of squamous, cuboidal, or columnar epithelium, containing gelatinous material showing periodic acid-Schiff (PAS) staining.…”

“…Colloid cysts are common benign lesions of the third ventricle, with a reported incidence of 0.2–2%, usually arising from the roof. [ 3 ] Rarely reported extraventricular locations include optic chiasm, olfactory groove, pituitary gland, fourth ventricle, cerebellum, brainstem, cerebral hemisphere, and velum interpositum. [ 5 ] Although benign, they can lead to drastic and lethal complications, if left untreated.…”

Sellar Colloid Cyst—An Anatomically Aberrant and Diagnostically Challenging Entity: Report of a Rare Case with Literature Review

“…Descriptions of sellar CC are extremely rare in the medical literature, with only a few published works describing clinical presentation. [4][5][6][7] The exact pathogenesis of this entity lacks clarity. Possible theories include degenerative processes and/or vascular insults.…”