Citations 2
Cerebral microbleeds: Causes, clinical relevance, and imaging approach – A narrative review
Sharma, Preetika, Kanekar, Sangam , Ajmera, Pranav , Agarwal, Amit , Ajmera, Pranav
Journal of Neurosciences in Rural Practice | March 8, 2024 | Volume: 15 | Issue: No issue available | Pages: 169-181
With advances in magnetic resonance imaging (MRI) sequences, there has been increased identification of microbleed/microhemorrhage across different population ages, but more commonly in the older age group. These are defined as focal areas of signal loss on gradient echo MRI sequences (T2* and susceptibility-weighted images), which are usually <5 mm in size representing hemosiderin deposition with wide ranges of etiologies. Susceptibility-weighted imaging (SWI) has become a routine MRI sequence for practices across the globe resulting in better identification of these entities. Over the past decade, there has been a better understanding of the clinical significance of microbleeds including their prognostic value in ischemic and hemorrhagic stroke. Cerebral amyloid angiopathy and hypertension are the two most common causes of microbleeds following peripheral and central pattern, respectively. In the younger age group, microbleeds are more common due to familial conditions or a wide range of hypercoagulable states. This review outlines the pathophysiology, prevalence, and clinical implications of cerebral microhemorrhage along with a brief discussion about the technical considerations of SWI.
Cauda equina neuroendocrine tumors: A single institutional imaging review of cases over two decades
Ajmera, Pranav , Mehta, P. , Benson, John C. , Madhavan, Ajay A. , Bathla, Girish , Agarwal, Amit K, Mehta, Parv M, Benson, John , Madhavan, Ajay A , Diehn, Felix E. , Soni, Neetu , Bathla, Girish , Ajmera, Pranav , Mehta, Parv , Agarwal, Amit
The Neuroradiology Journal | November 7, 2023 | Volume: 37 | Issue: 1 | Pages: 84-91
Cauda Equina Neuroendocrine Tumors (CE-NET), previously referred to as paragangliomas are a rare subset of spinal tumors, with limited data on imaging. Herein, we present a retrospective review of clinical and imaging findings of CE-NETs in ten patients who were evaluated at our institution over the past two decades. All patients had well-defined intradural lesions in the lumbar spine which demonstrated slow growth. A review of imaging findings revealed the presence of an eccentric vascular pedicle along the dorsal aspect of the tumor in 8 of the 10 patients (eccentric vessel sign), a distinctive finding that has not previously been reported with this tumor and may help improve the accuracy of imaging-based diagnosis. In all cases, a gross-total resection was performed, with resolution of symptoms in most of the cases.