Imaging Aspects of the Hippocampus

Alves, Isabela dos Santos; Coutinho, Artur Martins; Vieira, Ana Patrícia Freitas; Rocha, Bruno P; Passos, Ula Lindoso; Gonçalves, Vinícius Trindade; Silva, Paulo D. S.; Zhan, Malia X; Pinho, Paula C; Delgado, Daniel S; Docema, Marcos F L; Lee, Hae W.; Policeni, Bruno; Leite, Cláudia C.; Martin, Maria G. M.; Amancio, Camila T

doi:10.1148/rg.210153

Cited by 12 publications

(14 citation statements)

References 64 publications

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“…The posterior hippocampal artery supplies the hippocampal tail and can arise from the PCA or posterior choroidal artery. 16 Venous drainage of the hippocampus is primary through deep intrahippocampal veins, which include sulcal intrahippocampal veins and subependymal intrahippocampal veins, that drain into the superficial hippocampal veins. 17 The superficial hippocampal veins form two longitudinal arcades that drain into the inferior ventricular vein, the medial atrial vein, and the basal vein.…”

Section: Arterial Supply and Venous Drainagementioning

confidence: 99%

“…21 T2-weighted MRI is an important imaging sequence for assessing hippocampal abnormalities. 16 In numerous pathologies, such as mesial temporal sclerosis, limbic encephalitis, and hypoxic and ischemic injuries, the hippocampus will have abnormal T2/FLAIR hyperintensity. [22][23][24] Diffusion-weighted imaging (DWI) is useful for assessing vascular conditions, such as acute infarction and transient global amnesia.…”

Section: Magnetic Resonance Imagingmentioning

confidence: 99%

“…41,42 FDG-PET has higher accuracy and provides superior image resolution than SPECT for diagnosis of hippocampal-related conditions. 16,43,44 F I G U R E 8 Glioblastoma involving the left hippocampus. Axial diffusion-weighted imaging (A), susceptibility weighted imaging (B), fluid-attenuated inversion recovery (FLAIR) (C), and postcontrast T1-weighted (D) images show an enhancing, T2/FLAIR hyperintense expansile lesion involving the left hippocampus and left temporal lobe (arrows).…”

Section: Nuclear Medicinementioning

confidence: 99%

“…The middle hippocampal artery supplies the hippocampal body and can arise from the AChA or PCA. The posterior hippocampal artery supplies the hippocampal tail and can arise from the PCA or posterior choroidal artery 16 …”

Section: The Hippocampusmentioning

confidence: 99%

“…It can also be useful for detecting cortical dysplasia 21 . T2‐weighted MRI is an important imaging sequence for assessing hippocampal abnormalities 16 . In numerous pathologies, such as mesial temporal sclerosis, limbic encephalitis, and hypoxic and ischemic injuries, the hippocampus will have abnormal T2/FLAIR hyperintensity 22–24 .…”

Section: Hippocampal Imagingmentioning

confidence: 99%

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An imaging review of the hippocampus and its common pathologies

Lang,

Colby,

Ashby‐Padial

et al. 2023

Journal of Neuroimaging

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The hippocampus is a complex structure located in the mesial temporal lobe that plays a critical role in cognitive and memory‐related processes. The hippocampal formation consists of the dentate gyrus, hippocampus proper, and subiculum, and its importance in the neural circuitry makes it a key anatomic structure to evaluate in neuroimaging studies. Advancements in imaging techniques now allow detailed assessment of hippocampus internal architecture and signal features that has improved identification and characterization of hippocampal abnormalities. This review aims to summarize the neuroimaging features of the hippocampus and its common pathologies. It provides an overview of the hippocampal anatomy on magnetic resonance imaging and discusses how various imaging techniques can be used to assess the hippocampus. The review explores neuroimaging findings related to hippocampal variants (incomplete hippocampal inversion, sulcal remnant and choroidal fissure cysts), and pathologies of neoplastic (astrocytoma and glioma, ganglioglioma, dysembryoplastic neuroepithelial tumor, multinodular and vacuolating neuronal tumor, and metastasis), epileptic (mesial temporal sclerosis and focal cortical dysplasia), neurodegenerative (Alzheimer's disease, progressive primary aphasia, and frontotemporal dementia), infectious (Herpes simplex virus and limbic encephalitis), vascular (ischemic stroke, arteriovenous malformation, and cerebral cavernous malformations), and toxic‐metabolic (transient global amnesia and opioid‐associated amnestic syndrome) etiologies.

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Section: Arterial Supply and Venous Drainagementioning

confidence: 99%