Scholarly record

ATYPICAL VISUAL FIELD DEFECTS IN NON-FUNCTIONING PITUITARY ADENOMAS

M. Popescu, C. Mocanu, A. Ganescu

Abstract

Pituitary tumors often manifest through their local extension, involving the optic chiasm or the optic nerve and producing subsequent visual field alterations. Bitemporal hemi-anopsia is the most common visual field (VF) lesion in pituitary adenomas. According to tumor size and the degree of involvement of the optic chiasm, a variety of field modifications can occur. In the non-secreting pituitary adenomas patients, these alterations may very well predate the clinical features. The aim of this study was to report the prevalence and pattern of VF loss in pituitary non-functioning adenomas and to study the relationship between the tumor size and the severity of VF defects. In our series, VF deficits occurred in 95% of patients with non-functioning pituitary macroadenomas. The severity of the field defect increased with tumor volume. Typical bitemporal hemianopsia, whereas field defects including three or more quadrants was the most common VF modification (61,3% of cases). Atypical VF deficits were represented by monocular VF defects respecting the vertical meridian, homonymous hemianopsia, central defect associated with contralateral hemianoptic deficit, altitudinal arcuate deficits, constricting of peripheral limits, bilateral non-systematic scotomas.

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DOI resolver: doi.org/10.5593/sgemsocial2017/33/S12.012

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