MR perfusion characteristics of pseudoprogression in brain tumors treated with immunotherapy - a comparative study with chemo-radiation induced pseudoprogression and radiation necrosis.

Purpose: Pseudoprogression is an atypical imaging pattern of response to immunotherapy in patients with brain tumors. MR perfusion studies in this field are limited. The purpose of our study is to compare the perfusion features between pseudoprogression lesions in malignant gliomas and brain metastases treated with immunotherapy (iPsP) and the pseudoprogression after chemo-radiation therapy and radiation necrosis after radiation treatment (ChR-PsP & RN).

Primary Intraocular Lymphoma: Rad-Path and Ophthalmologic Correlation.

Primary intraocular lymphoma (PIOL) is a rare form of primary central nervous system lymphoma that poses diagnostic challenges due to its nonspecific clinical features and complex imaging characteristics. This paper presents a focus case and two companion cases, highlighting the complexities in identifying and treating PIOL. In the focus case, A 66-year-old male experienced gradual painless vision loss with choroidal thickening on funduscopic exam and subsequent follow-up MRI.

Mesenchymal Non-Meningothelial Tumors of the CNS: Evolving Molecular Landscape and Implications for Neuroradiologists.

The World Health Organization Classification of Tumors of the Central Nervous System (WHO CNS5) significantly revised the terminology and diagnostic criteria of "mesenchymal non-meningothelial" tumors of CNS to better align with the classification of these soft tissue tumors outside the CNS. The CNS chapter only covers the entities with distinct histological or molecular characteristics that occur exclusively or primarily in the CNS. These tumors usually arise from the meninges and are rarely intraparenchymal in origin, mainly in the supratentorial compartment.

Transradial versus transfemoral access for treatment of HCC: a systematic review and meta analysis.

Aim: Hepatic angiography procedures are essential in the treatment of hepatocellular carcinoma (HCC), with traditional transfemoral arterial (TFA) access being the traditional standard. Recently, transradial arterial (TRA) access has gained popularity, offering potential benefits. This study aims to conduct a systematic review and meta-analysis to compare TRA and TFA access in hepatic angiography oncologic procedures for HCC.