Tiny cystic pituitary lesion on the previous brain MRI. For follow-up.. In the posterior aspect of the sella, there is a 6 mm T1 hyperintense, mildly lobulated, mildly heterogeneous soft tissue that is larger than the neurohypophysis is expected to be. This lesion shows no definite contrast enhancement and has not changed since the previous examination. Along the anterior aspect of this lesion, there is a thin nonenhancing focus which also remains unchanged. Remainder of the pituitary gland demonstrates normal homogeneous enhancement. No evidence of mass effect. Bilateral cavernous sinuses and optic chiasm are unremarkable.Limited assessment of the brain shows no intracranial hemorrhage, mass, or acute infarct. The ventricles and other CSF containing spaces are normal in size. Major intracranial arteries are patent. A 10 mm pineal cyst is unchanged.
1.Compared to 4/16/2014 there is unchanged appearance of the pituitary gland with subcentimeter T1 hyperintense lesion involving the posterior pituitary favored to represent a Rathke cleft cyst or pars intermedia cyst. No associated mass effect.2.Limited sequences obtained of the remainder of the brain are unremarkable without evidence of intracranial mass or mass effect.