Persistent severe visual field impairment is associated with obesity and tumour invasiveness, but not with pituitary dysfunction, in patients with craniopharyngioma

Abstract

Purpose: Craniopharyngiomas (CP) are benign tumours of the sellar region. Hypopituitarism, visual deficits, hypothalamic damage with consequent obesity and related increased cardiovascular risk, are complications due to the tumour itself or secondary to treatment strategy. We retrospectively correlated visual field status with clinical, neuroradiological, histopathological features and management strategy, in a single-centre cohort of patients with CP.

Methods: Thirty-four patients (16 M; median age 27.2 ± 21.8 yrs) with CP were included. We evaluated visual field status, assessed by means of standard automated perimetry and expressed as mean deviation (MD), at last follow-up visit (median 14 ± 11.7 yrs). MD has been correlated with clinical, radiological, histological data and treatment modalities.

Results: In univariate analysis worst eye MD was significantly associated with panhypopituitarism (p 0.010). In multivariable linear regression, panhypopituitarism (p 0.008), CP recurrence (p 0.020) and DI (p 0.004) were found to be the main independent predictors of a worse visual field outcome. When stratifying patients according to the degree of visual field impairment (MD < -12 dB Vs MD > -12 dB), the main independent predictors of worse visual field outcome were older age at diagnosis (p 0.010), CP histological subtype (p 0.004), invasiveness (p 0.04), CP recurrence (p 0.035), DI (p 0.002) and weight at last follow-up (p 0.012).

Conclusion: In CP patients the long-term ophthalmological impairment is frequent, especially at older age, and strictly related to tumour invasiveness and recurrence, and associated to pituitary disfunction and obesity.

Keywords: Craniopharyngioma; Hypopituitarism; Obesity; Perimetry; Visual field.