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The posterior part of the pituitary gland is known to depict a bright spot, evident on T1 sequence. The absence of T1 hyperintense spot in the posterior pituitary has generally lead to the search of ectopic pituitary, pathology of the posterior pituitary gland. However many studies have shown that the absence of the posterior bright spot can be found incidentally in patients with no symptoms on routine imaging for other pathologies. Hence the need for this study to study the incidence of posterior pituitary bright spot in the sample population of coastal Karnataka. Material and methods: A retrospective study was conducted wherein 300 MRI brains where studied and the posterior pituitary bright spot was examined for its presence. The studies where done as part of disease course of patients presenting to our hospital, patients with sellar disease or post op cases in the sellar region where excluded. The studies where performed on PHILIPS achieve 1.5 T machine and the sagittal images, 1.5-2.5mm thickness were examined. Results: In our study 300 MRI brains were studied, 189 where males (63%) and 111 where females (37%). Of the female population, all showed presence of the pituitary bright spot (100%). In the male population, one patient showed no posterior pituitary bright spot, Rest of the male population ie 188 (99.5%) showed e/o of the pituitary bright spot. In total 99.6% ie 299 out of 300 patients showed e/o of the pituitary bright spot. Conclusion: We conclude in our study, 99.6% of the sample population in our study showed e/o of the pituitary bright spot, one patient did not show the posterior pituitary bright spot, which could be a normal variation.

Posterior Pituitary Bright Spot – A Study in Coastal Karnataka