Back to the list
Congress: ECR25
Poster Number: C-10104
Type: Poster: EPOS Radiologist (educational)
DOI: 10.26044/ecr2025/C-10104
Authorblock: S. Suresh, S. Reddy K, D. Jayanna, A. Josephine, U. Nayak; Bangalore/IN
Disclosures:
Siddhanth Suresh: Nothing to disclose
Shravan Reddy K: Nothing to disclose
Dhanush Jayanna: Nothing to disclose
Arpitha Josephine: Nothing to disclose
Unnathi Nayak: Nothing to disclose
Keywords: Anatomy, CNS, Neuroradiology brain, CT, MR, MR-Angiography, Diagnostic procedure, Education, Cerebrospinal fluid, Infection, Inflammation
Learning objectives 1) To review the applied anatomy of perimesencephalic cisterns and their surrounding neurological structures.2) To enumerate the various associated pathologies so as to aid in their identification and thereby improve the quality of neuroradiological reporting.
Read more Background Perimesencephalic cisterns are subarachnoid compartments surrounding the midbrain, filled with cerebrospinal fluid (CSF). These cisterns are crucial for maintaining the structural and functional integrity of the brainstem and nearby neural structures (1). They can harbour a range of pathological conditions, from simple subarachnoid haemorrhages to complex infections and tumours. Moreover, effacement or displacement of these spaces may signal specific clinical disorders. Despite their significance, there is a paucity of literature on the pathologies affecting perimesencephalic cisterns, and they are often...
Read more Findings and procedure details Magnetic resonance imaging (MRI) is the preferred modality for evaluating the perimesencephalic cisterns due to its superior spatial resolution, ability to distinguish cerebrospinal fluid (CSF) from adjacent brain structures, and excellent soft tissue contrast. While computed tomography (CT) has a role in specific contexts, MRI’s ability to detect both normal and pathological conditions is unparalleled. It is particularly crucial in the evaluation of acute subarachnoid haemorrhage (SAH), where MRI can detect blood within the cisterns and associated mass effects, such...
Read more Conclusion Perimesencephalic cisterns are associated with a wide range of disease states, many of which can prove to be elusive to the radiologist's eye if not effectively scrutinised. Therefore, knowledge and insight into the anatomy and associated pathologies of the same can significantly improve the diagnostic accuracy of neuroradiology reporting. 
Read more References Altafulla J, Bordes S, Jenkins S, Litvack Z, Iwanaga J, Loukas M, et al. The Basal Subarachnoid Cisterns: Surgical and Anatomical Considerations. World Neurosurgery. 2019 Sep 1;129:190–9. Lakhani DA, Morris MO, Deng F. Intracranial Dermoid Cyst. Radiology. 2024 Apr;311(1):e232952. Lyndon D, Lansley JA, Evanson J, Krishnan AS. Dural masses: meningiomas and their mimics. Insights into Imaging. 2019 Feb 6;10(1):11. Chen CY, Wong JS, Hsieh SC, Chu JS, Chan WP. Intracranial Epidermoid Cyst with Hemorrhage: MR Imaging Findings. AJNR Am J Neuroradiol. 2006 Feb;27(2):427–9. Riveros...
Read more
GALLERY