Quadrigeminal cistern lipoma
Patient is a known case of left fronto-temporal low grade astrocytoma post de bulking surgery on chemotherapy
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An extra axial SOL is noted in the quadrigeminal cistern in the right para sagittal plane just posterior to the tectal plate of the mid brain, eliciting hyperintense signal on T1 and hypointense signal on T2, shows complete loss of signal on the T1 fat saturation sequence, suggestive of fat containing lesion. It shows blooming on the GRE sequence, and no significant contrast enhancement.
Intracranial lipomas are rare benign congenital neoplasms accounting for 0.1 to 0.5% of all primary brain tumours. Quadrigeminal cistern lipomas make up approximately 25% of intracranial lipomas and are located within the quadrigeminal cistern. They may be associated with hypoplasia of the inferior colliculus or agenesis of the corpus callosum. These are slow growing benign lesions, usually asymptomatic and rarely require surgery. Diagnosis of quadrigeminal cistern lipoma is always definitive on MRI study and therefore histopathological confirmation is practically never required.
- 1. Panchal M, Jethva M, Trivedi A et al.Case series of: Quadrigeminal plate cistern lipoma on MRI imaging. IOSR Journal of Dental and Medical Sciences (IOSR-JDMS). 2014;13(9):41-44. 2.Selcuk Y, Hasan K, Kaya A et al. Quadrigeminal cistern lipoma. J Clin Neurosci 2005; : 596–9. 3.Truwit CL, Barkovich AJ. Pathogenesis of intracranial lipoma: an MR study in 42 patients. AJR Am J Roentgenol. 1990;155 (4): 855-64.