Publications by authors named "Mohit Maheshwari"

Orbital disorders in children consist of varied pathologies affecting the orbits, orbital contents, visual pathway, and innervation of the extraocular or intraocular muscles. The underlying etiology of these disorders may be traumatic or nontraumatic. Presumed location of the lesion along with the additional findings, such as eye pain, swelling, exophthalmos/enophthalmos, erythema, conjunctival vascular dilatation, intraocular pressure, etc, help in determining if imaging is needed, modality of choice, and extent of coverage (orbits and/or head).

View Article and Find Full Text PDF

Objective: To develop consensus on diagnostic criteria for LUMBAR syndrome, the association of segmental infantile hemangiomas that affect the Lower body with Urogenital anomalies, Ulceration, spinal cord Malformations, Bony defects, Anorectal malformations, Arterial anomalies and/or Renal anomalies.

Study Design: These diagnostic criteria were developed by an expert multidisciplinary and multi-institutional team based on analysis of peer-reviewed data, followed by electronic-Delphi consensus of a panel of 61 international pediatric specialists.

Results: After 2 Delphi rounds, a 92% or higher level of agreement was reached for each Delphi statement.

View Article and Find Full Text PDF

Purpose: Post-hemorrhagic ventricular dilation (PHVD) leads to developmental delays in premature infants, yet the optimal timing of neurosurgical interventions is unknown. Neuroimaging modalities have emerged to delineate injury and follow the progression of PHVD. Fronto-temporal horn ratio (FTHR) is used as a marker of ventricular dilation and can be a standardized tool to direct the timing of neurosurgical intervention.

View Article and Find Full Text PDF

Functional near infrared spectroscopy (fNIRS) and functional magnetic resonance imaging (fMRI) both measure the hemodynamic response, and so both imaging modalities are expected to have a strong correspondence in regions of cortex adjacent to the scalp. To assess whether fNIRS can be used clinically in a manner similar to fMRI, 22 healthy adult participants underwent same-day fMRI and whole-head fNIRS testing while they performed separate motor (finger tapping) and visual (flashing checkerboard) tasks. Analyses were conducted within and across subjects for each imaging approach, and regions of significant task-related activity were compared on the cortical surface.

View Article and Find Full Text PDF
Article Synopsis
  • * The SVRIII Brain Connectome study aims to analyze neuroimaging from patients and healthy controls but has faced recruitment and logistical challenges, especially during the COVID-19 pandemic.
  • * Solutions included adding more study sites, improving coordination among researchers, and implementing new strategies for recruiting healthy controls while also overcoming technical issues with neuroimage collection.
View Article and Find Full Text PDF

Unlabelled: Patients with hypoplastic left heart syndrome who have been palliated with the Fontan procedure are at risk for adverse neurodevelopmental outcomes, lower quality of life, and reduced employability. We describe the methods (including quality assurance and quality control protocols) and challenges of a multi-center observational ancillary study, SVRIII (Single Ventricle Reconstruction Trial) Brain Connectome. Our original goal was to obtain advanced neuroimaging (Diffusion Tensor Imaging and Resting-BOLD) in 140 SVR III participants and 100 healthy controls for brain connectome analyses.

View Article and Find Full Text PDF
ACR Appropriateness Criteria® Ataxia-Child.

J Am Coll Radiol

November 2022

Childhood ataxia may be due to multifactorial causes of impairment in the coordination of movement and balance. Acutely presenting ataxia in children may be due to infectious, inflammatory, toxic, ischemic, or traumatic etiology. Intermittent or episodic ataxia in children may be manifestations of migraine, benign positional vertigo, or intermittent metabolic disorders.

View Article and Find Full Text PDF

Septo-optic dysplasia (SOD) is a developmental phenotype characterized by midline neuroradiological anomalies, optic nerve hypoplasia, and pituitary anomalies, with a high degree of variability and additional systemic anomalies present in some cases. While disruption of several transcription factors has been identified in SOD cohorts, most cases lack a genetic diagnosis, with multifactorial risk factors being thought to play a role. Exome sequencing in a cohort of families with a clinical diagnosis of SOD identified a genetic diagnosis in 3/6 families, de novo variants in , , and , and explored variants of uncertain significance in the remaining three.

View Article and Find Full Text PDF
Article Synopsis
  • Axenfeld-Rieger syndrome (ARS) is a rare genetic disorder characterized by eye anomalies and potential systemic features, with varying subtypes linked to specific genes that influence the severity and type of symptoms.
  • A study examined 128 individuals with genetic variants related to ARS, revealing a range of ocular anomalies and distinct systemic features for different gene types, including high rates of dental and heart defects.
  • The findings emphasize the importance of gene-specific diagnoses for ARS, as clinical features can significantly differ based on the affected gene, and suggest that the De Hauwere syndrome may be related to the FOXC1 gene.
View Article and Find Full Text PDF

Objective: Periventricular nodular heterotopia is a neurodevelopmental disorder in which neurons fail to migrate to the cortical surface, forming discrete areas of grey matter adjacent to the lateral ventricles. Given that periventricular nodular heterotopia is seen as an incidental finding in patients without epilepsy, causality between periventricular nodular heterotopia and epilepsy cannot be assumed. Furthermore, the structural characteristics of periventricular nodular heterotopia in patients with epilepsy are poorly defined and can be misleading.

View Article and Find Full Text PDF

Introduction: Infants with esophageal atresia and/or tracheoesophageal fistula (EA/TEF) undergo screening for tethered cord syndrome (TCS) via ultrasound and magnetic resonance imaging. Existing literature lacks data to guide optimal timing of screening and magnetic resonance imaging (MRI) is often delayed until 3-6 mo of age, when it is frequently forgotten. Detethering surgery has a high rate of success in patients with TCS and is often performed prophylactically due to potential irreversible deficits.

View Article and Find Full Text PDF

Functional MR imaging (MRI) is a valuable tool for presurgical planning and is well established in adult patients. The use of task-based fMRI is increasing in pediatric populations because it provides similar benefits for pre-surgical planning in children. This article reviews special adaptations that are required for successful applications of task-based fMRI in children, especially in the motor and language systems.

View Article and Find Full Text PDF

Identification of the language dominant hemisphere is an essential part of the evaluation of potential pediatric epilepsy surgery patients. Historically, language dominance has been determined using the intracarotid amobarbitol procedure (IAP), but use of functional Magnetic Resonance Imaging (fMRI) scanning is becoming more common. Few studies examine the correspondence between fMRI and IAP in pediatric samples.

View Article and Find Full Text PDF

Objective: Temporal lobe epilepsy (TLE) is the most common focal epilepsy across adult and pediatric age groups. It is also the most amenable to surgery, with excellent long-term seizure outcome. Most TLE cases have an epileptogenic zone in the mesial temporal structures, namely the hippocampus.

View Article and Find Full Text PDF
Article Synopsis
  • Stroke in children is a rare but serious health issue that can lead to significant complications and may be caused by brain ischemia or bleeding.
  • Symptoms of pediatric strokes can include headache, vomiting, weakness, and more, but many cases actually involve conditions that mimic strokes, making diagnosis challenging.
  • Imaging is essential for identifying true strokes due to the variety of potential causes and the overlap in symptoms; guidelines from organizations like the American College of Radiology help determine appropriate imaging and treatment based on current research.
View Article and Find Full Text PDF

Head trauma is a frequent indication for cranial imaging in children. The majority of accidental pediatric head trauma is minor and sustained without intracranial injury. Well-validated pediatric-specific clinical decision guidelines should be used to identify very low-risk children who can safely forgo imaging.

View Article and Find Full Text PDF

Background: Aplasia cutis congenita of the head may be associated with underlying fusion defects in the skin, soft tissues, muscle, or bone. The risk of central nervous system dysraphism in patients with aplasia cutis congenita is not known; however, knowledge of underlying structural defects can inform management considerations.

Methods: This retrospective review investigated the risk of cranial central nervous system dysraphism in children presenting with aplasia cutis congenita of the head, who presented between 1/1/2000 and 6/15/2016.

View Article and Find Full Text PDF

Importance: Oral propranolol is widely considered to be first-line therapy for complicated infantile hemangioma, but its use in patients with PHACE (posterior fossa malformations, hemangioma, arterial anomalies, cardiac defects, eye anomalies) syndrome has been debated owing to concerns that the cardiovascular effects of the drug may increase the risk for arterial ischemic stroke.

Objective: To assess the incidence of adverse events among patients with PHACE syndrome receiving oral propranolol for infantile hemangioma.

Design, Setting, And Participants: This multicenter retrospective cohort study assessed the incidence of adverse events among 76 patients with PHACE syndrome receiving oral propranolol for infantile hemangioma at 11 tertiary care, academic pediatric dermatology practices.

View Article and Find Full Text PDF

Extraneural metastasis is extremely rare in pediatric patients with high-grade glioma and carries a grim prognosis. Detection of metastases at initial presentation is even rarer. A 15-year-old adolescent girl presented with paraplegia, urinary retention, and a constellation of systemic symptoms.

View Article and Find Full Text PDF
Pediatric Presurgical Functional MRI.

Top Magn Reson Imaging

August 2019

Functional MRI is a reliable, noninvasive technique which allows spatial mapping of the various functions like sensorimotor, language and vision in the brain. This is of immense help to the neurosurgeon in presurgical planning and intraoperative navigation in order to identify and preserve eloquent areas of the brain and minimize post-surgical neurological deficits. Using this technique in children pose unique challenges.

View Article and Find Full Text PDF

Background: Awareness of PHACE syndrome has increased; however, little information exists regarding its natural history, especially in patients over the age of 18. We aim to describe the natural history of PHACE to enhance clinical management and counseling of patients.

Methods: A cohort of patients ≥ 18 years was identified through the PHACE Syndrome Registry and a Vascular Anomalies Clinic Database.

View Article and Find Full Text PDF

PHACE syndrome is the association of segmental facial hemangiomas with congenital arterial, brain, cardiac, and ocular anomalies. Structural brain malformations affect 41-52% of PHACE patients and can be associated with focal neurologic deficits, developmental delays, and/or intellectual disability. To better characterize the spectrum of structural brain and other intracranial anomalies in PHACE syndrome, MRI scans of the head/neck were retrospectively reviewed in 55 patients from the PHACE Syndrome International Clinical Registry and Genetic Repository.

View Article and Find Full Text PDF

Segmental infantile hemangiomas (IH) can be associated with congenital anomalies in a regional distribution. PHACE refers to large cervicofacial segmental IH in association with congenital anomalies of the aortic arch and medium-sized arteries of the head and neck, as well as structural anomalies of the posterior fossa and eye. A subset of PHACE patients have arterial anomalies that progress to moyamoya vasculopathy (MMV).

View Article and Find Full Text PDF