To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
We sought to identify clinical and radiologic predictors of visual recovery and explore visual outcomes in patients who underwent transsphenoidal resection of pituitary neuroendocrine tumors (PitNETs).
Methods:
Retrospective study of patients with PitNETs approaching/contacting the chiasm at a tertiary neuro-ophthalmology practice. Clinical/demographic/MRI data were analyzed. Patients with a final visual acuity (VA) of at least 20/40 and a final visual field mean deviation (VF MD) of −5 dB or better were defined as positive outcomes.
Results:
68 patients were analyzed, including 44 patients who underwent surgery and 24 who were observed during the study period. Of those who underwent surgery, patients with positive VA outcomes had better preoperative VA (logMAR 0.3 vs 1.3), VF MD (−8.1 vs −17.9 dB), thicker retinal nerve fiber layer (RNFL) (81.9 vs 69.5 µm) and ganglion cell complexes (GCC) (69.0 vs 50.5 µm) than those without. VF outcomes were predicted by better preoperative VA (logMAR 0.3 vs 0.7), VF MD (−7.4 vs −14.5 dB), thicker RNFL (84.1 vs 70.5 µm) and GCC (71.2 vs 55.6 µm) measurements and smaller tumor volume (8.4 vs 18.2 cm3).
Conclusion:
Preoperative VA/VF MD/RNFL/GCC thickness may predict visual outcomes after PitNET resection. Neuroradiologic factors failed to predict visual outcomes.
Schizophrenia (SCZ) is a heterogeneous disorder characterized by widespread brain dysconnectivity, yet it remains unclear whether variable structural dysconnectivity patterns reflect biologically and clinically meaningful subtypes.
Methods
We recruited 105 SCZ patients and 97 healthy controls, collecting magnetic resonance imaging, clinical assessment, and laboratory test data. Double generalized linear models were first applied to estimate group differences in the mean and inter-individual variability of structural connectivity between SCZ and controls. Subsequently, nonnegative matrix factorization was used to identify SCZ subtypes according to dysconnectivity profiles.
Results
We observed a significantly altered subnetwork that exhibited increased inter-individual variability in SCZ, with its connections and regions predominantly enriched in the ventral-attention, frontal–parietal, and default-mode networks that support higher-order cognition. Connectivity-derived subtype analysis grouped patients into two subtypes, with subtype-II tending to show more severe positive symptoms (t = 2.272, nominal P = 0.025), a lower neutrophil/lymphocyte ratio (t = −2.383, nominal P = 0.025), a better treatment response (t = 2.366, nominal P = 0.021), and greater short-term symptom improvement (t = 3.509, nominal P = 0.006) within the olanzapine monotherapy subgroup. This subtype also demonstrated distinct neuroanatomical features, including a subtype-specific cortical thickness change pattern unrelated to SCZ or bipolar disorder, as well as subtype-specific brain epicenters, such as left posterior cingulate and rostral middle frontal regions.
Conclusions
Our study demonstrates increased inter-individual variability in the structural connectome of SCZ and highlights the potential of connectome-based subtyping approaches for characterizing disease heterogeneity related to pathophysiological processes.
Hypoxic–ischemic encephalopathy (HIE) is a common cause of neonatal encephalopathy and requires careful and prompt diagnosis in order to initiate therapeutic hypothermia, a time-sensitive neuroprotective treatment. The clinical presentation is key in distinguishing HIE from other causes of neonatal encephalopathy and includes assessment of Apgar scores, physiologic markers of acute hypoxia such as the initial blood gas, the presence of an acute hypoxic–ischemic event, and exam findings consistent with a moderate or severe degree of encephalopathy. Specific eligibility criteria exist for each of these factors and are standardized across centers. Neurodiagnostic tools important for the evaluation and management of HIE include the electroencephalogram (EEG) and magnetic resonance imaging (MRI). EEG can help assess the degree of encephalopathy, provide early prognostic information, and detect subclinical seizures. The MRI is the gold standard imaging test to evaluate the location and degree of HIE injury and provide the most accurate information about long-term outcome.
Neurological soft signs (NSS) are frequent in schizophrenia spectrum disorders (SSD) and have been linked to structural alterations in basal ganglia-thalamic (BGT) regions. We hypothesized that SSD patients would show BGT volume differences compared to healthy controls (HC) and that NSS severity would relate to BGT volume and surface morphology in a replicable pattern.
Methods
Structural 3T T1-weighted MRI scans were obtained from 327 SSD patients and 134 matched HC in Mannheim (Germany) and Bern (Switzerland). NSS were assessed using the Heidelberg Scale and the Neurological Evaluation Scale (NES). BGT volumes were segmented using FSL-FIRST and compared across groups using general linear models adjusted for age, sex, intracranial volume, and daily antipsychotic medication. Associations with NSS scores were tested using regression analyses.
Results
High-NSS compared to low-NSS SSD patients showed reduced left accumbens volume in both cohorts, with a significant main effect in the Mannheim cohort (β = −43.73, p = .002 uncorrected, p = .019 corrected) and a partial replication in the Bern cohort (β = −53.06, uncorrected p = .03, p > .05, corrected). In contrast, IF-related effects on left accumbens and bilateral thalamic volumes were cohort specific. Daily antipsychotic medication and illness duration did not mediate or moderate these associations.
Conclusions
This bicentric MRI study provides converging evidence that NSS severity in SSD is associated with BGT alterations, particularly reduced left nucleus accumbens volume. However, thalamic and surface-level findings were cohort specific, indicating partial rather than uniform reproducibility. Associations were not explained by daily dosage of antipsychotic medication or illness duration.
Injuries to the scalp and cranium are often encountered in children who suffer abusive head trauma. Various imaging modalities, such as radiography, CT and MRI, contribute to accurately diagnosing these injuries and reliably differentiating them from normal variants. A significant challenge in both radiographic and clinical evaluations of skull fractures and extracranial soft tissue injuries is the resemblance between accidental and nonaccidental injuries. Thus, a comprehensive approach that combines imaging findings with the patient’s history, physical examination and laboratory results is essential in each case. This chapter presents vital information on the developmental anatomy of the cranium and scalp and how these relate to traumatic injuries. It also reviews the imaging features of typical abusive injuries, their association with specific mechanisms of trauma and the appropriateness of various imaging modalities.
Facial and orbital trauma are frequently seen in cases of child abuse, with certain patterns, such as specific types of retinal haemorrhage, being highly indicative of abusive head trauma. These injuries can be subtle on imaging and often lack a clear history. While some abusive injuries may resemble accidental ones, particular injury patterns or combinations of injuries, alongside additional clinical findings, raise concerns for abuse. Radiologists play a critical role in diagnosing these injuries by obtaining a thorough history and utilizing advanced imaging techniques like MRI and CT with three-dimensional reconstructions, which provide detailed views of soft tissue and bone. Recognizing subtle signs of trauma and correlating them with the clinical context is essential for accurate diagnosis and the child’s protection. Early detection and precise diagnosis by the radiologist enable the multidisciplinary team to intervene appropriately, ensuring the safety and well-being of vulnerable children.
This chapter provides a summary of longstanding and updated research for the accurate diagnosis of fractures of the clavicle, sternum and scapula in the setting of suspected physical abuse of infants and young children. Findings key to diagnosing fractures by radiographic skeletal survey, computed tomography, ultrasound and magnetic resonance imaging are demonstrated with numerous representative examples. A section for each of these anatomical regions includes a detailed review of anatomy and injury mechanisms in addition to characteristic imaging features. Considerations for differential diagnosis and pitfalls in interpretation are presented specific to each anatomic area. Attention to imaging technique and careful evaluation of findings are emphasized to promote proper diagnosis.
Abusive spinal injury is important to understand and recognize as it may be the only manifestation of child physical abuse and may result in significant morbidity and mortality if undetected. In this chapter, we review historical literature about spinal trauma in the era of radiography and skeletal surveys as well as the expanding literature, epidemiology and understanding of this manifestation of inflicted injury in the era of increased CT and MRI utilization. We highlight key anatomic considerations of developing infants and young children, which make them susceptible to specific types of inflicted spine trauma with emphasis placed on the craniocervical junction, which is particularly susceptible to injury. We provide many imaging case examples to help the reader understand and recognize the myriad and specific types of injuries that occur. Considering our increased understanding of abusive spinal trauma, we discuss implications to imaging evaluation, technique and screening if inflicted spinal injury is detected or suspected.
Visceral injuries are important manifestations of child abuse. This chapter reviews mechanisms, clinical presentation and imaging of inflicted injuries involving the neck, thorax, abdomen and pelvis. Because most visceral injuries can be plausibly explained as accidental, the significance of the injuries noted radiologically must be assessed in conjunction with the clinical context, including age and ambulatory status of the child, and other imaging findings, particularly skeletal findings that may be more specific for abuse.
This chapter, written by a team of radiologists, a pathologist and a child abuse pediatrician, focuses on extra-axial hemorrhage, i.e., epidural, subdural, subarachnoid and intraventricular hemorrhage, in relation to abusive head trauma. For each, an in-depth discussion of the hemorrhage and it’s clinical presentation in combination with imaging and neuropathological considerations is presented. In the section on subdural hematomas (SDHs), attention is also focused on birth-related SDHs and SDHs in children with benign enlargement of the subarachnoid space. Other types of subdural collections are presented, although with a more limited scope.
Given the relevance in child abuse investigations the authors also present data helpful in differentiating between accidental and nonaccidental causes of extra-axial hemorrhage and on the potential of imaging and neuropathologic examinations in dating the traumatic event leading to the extra-axial hemorrhage.
Post-mortem imaging is an indispensable tool in the investigation of suspicious childhood deaths, particularly for identifying fractures and intracranial hemorrhages. It offers significant logistical advantages over traditional autopsies, including cost-effectiveness and rapid image acquisition. However, its application requires close collaboration between radiologists, pathologists and forensic experts, and is rarely used as a standalone approach. This chapter delves into the role of post-mortem imaging, with a primary focus on post-mortem CT and some coverage of post-mortem MRI and novel techniques of micro-CT and linear slot scanning.
The chapter discusses key medicolegal considerations, imaging protocols, common findings and interpretation challenges and the importance of maintaining strict chain-of-custody protocols. As post-mortem imaging continues to gain traction, we underscore the need for standardized imaging protocols and enhanced support for multidisciplinary teams to safeguard the well-being of professionals conducting these sensitive examinations.
This chapter reviews the most common clinical presentations of abusive head trauma (AHT) and associated indications for imaging. The presentation of AHT is highly variable, and may include a history of accidental trauma, acute neurologic or constitutional symptoms, sentinel non-central nervous system (CNS) injuries, macrocephaly or chronic neurologic dysfunction or asymptomatic high-risk contacts of a child abuse victim. The indications for screening neuroimaging depend on clinical presentation and level of concern. Some patients warrant evaluation based on acute neurological presentation. In others the clinical history, physical examination, laboratory and non-CNS radiologic findings indicate the need for screening. This chapter reviews the available evidence and outlines an approach to screening neuroimaging followed by diagnostic evaluation. Cranial ultrasound, CT or MRI are used depending on presentation and clinical setting. If screening neuroimaging is suspicious for AHT then full diagnostic neuroimaging evaluation with brain and often spine MRI is essential. Strengths and limitations of the modalities used are discussed.
Abusive head trauma (AHT) is a leading cause of traumatic death in infants, often resulting in severe brain injuries with lifelong consequences. It can cause cognitive, sensory and behavioral impairments, which may not fully emerge until later in childhood. AHT injuries are typically classified as primary (direct mechanical damage, such as contusions and lacerations) or secondary (indirect effects like hypoxic-ischemic injury and cerebral edema).
Infants are particularly vulnerable due to factors like poor neck control, larger head size and incomplete brain development. Neuroimaging, especially MRI and diffusion-weighted imaging, is essential for diagnosing these injuries and tracking their evolution, as some manifestations develop over days or weeks. Mechanisms of cell death, including necrosis, apoptosis and autophagy, play a key role in the progression of brain damage.
Differentiating AHT from accidental trauma is challenging. Certain patterns, such as subdural hemorrhages with ischemic injury, strongly suggest abuse. Comprehensive imaging, clinical evaluation and follow-up are crucial for documenting injury progression and understanding its impact on the developing brain.
The habenula, a small brain structure involved in processing aversive stimuli, has been strongly implicated in the pathophysiology of mood disorders. While diminutions in hippocampal and medial prefrontal cortex volume have been demonstrated in individuals with a mood disorder, evidence for structural alterations in the habenula remains inconsistent. This set of meta-analyses examines whether individuals with a mood disorder show alterations in habenula volume compared to healthy controls. We conducted six meta-analyses. Two global analyses compared left and right habenula volumes between individuals with a mood disorder (MDD or BD) and healthy controls (HCs), each including 15 samples (left: 1,230 participants; right: 1,236). Four additional analyses compared MDD versus HCs and BD versus HCs for left and right volumes separately. Subgroup and meta-regression analyses tested the habenula segmentation method, medication status, and MRI resolution as moderators. The global meta-analyses pooling MDD and BD data showed small but significant volume reductions in the left (g = −0.1367, p = .0344) and right (g = −0.1562, p = .0409) habenula in mood disorder patients compared to controls. However, these effects did not survive correction for multiple comparisons. After correction, no significant group differences were found in the diagnosis-specific meta-analyses (MDD versus controls; BD versus controls), and no moderator analyses were significant. Current evidence points toward small habenula volume reductions in mood disorders, though findings did not withstand correction for multiple comparisons. Further high-resolution neuroimaging studies are needed to clarify habenula volume alterations in mood disorders.
Congenital uterine anomalies arise from an abnormality in the embryological development process. There can be defects in unification, canalisation or complete agenesis. Uterine anomalies are mnore common in those who experience miscaarriage compared with the general population. Patients with uterine anomalies are at higher risk of infertility, early and second trimester miscarriage, pre-term birth and malpresenatation at delivery.
Maternal hyperglycemia is associated with higher risk of metabolic diseases in offspring. Despite various hypotheses, the exact mechanisms remain unclear and the neural implication is yet to be fully investigated. The hypothalamus plays a critical role in energy regulation. In utero exposure to maternal hyperglycemia might selectively affect the developing hypothalamus. To test this hypothesis, we investigated associations between in utero exposure to maternal hyperglycemia and hypothalamic volume at 10–12 years of age. We included 82 mother–child pairs from the Gen3G prospective birth cohort, followed up 10–12 years after birth. Women underwent a 75g Oral Glucose Tolerance Test (OGTT) at 24–30 weeks of gestation, and we calculated the area-under-the-curve of glucose (AUCgluc) from maternal glucose measurements at fasting, 1h and 2h during OGTT to reflect prenatal hyperglycemia exposure. During the follow-up visit at 10–12 years of age, a subsample of children (n = 82) completed 3 T brain magnetic resonance imaging (MRI) to quantify brain volumes with FreeSurfer 7. We used Pearson correlations and partial correlations with adjustments to test associations between the AUCgluc and offspring hypothalamic brain volumes. We found that higher maternal AUCgluc was associated with greater total offspring hypothalamic volume (r = 0.30; p = 0.006). In comparison, no other brain region was significantly correlated with the maternal AUCgluc. Correlations remain significant when adjusted for maternal or offspring’s variables. Overall, we found that higher maternal glycemic response following OGTT in pregnancy appears associated with larger offspring hypothalamic volume. Our results suggest that prenatal exposure to hyperglycemia may lead to hypothalamic programming.
Anorexia nervosa (AN) is an eating disorder that is mediated by psychological and metabolic factors, yet it is unclear how these factors interact. The NAMA trial objective is to clarify the metabo–psychiatric interaction and identify how it affects AN patients’ behaviour. This randomised trial will recruit thirty-six treatment-naïve female AN patients, 13–18 years of age, and thirty-six matched healthy controls. Participants will undergo psychiatric assessments followed by 12-h overnight fasting. The next morning, baseline assessments of outcomes will be performed. Patients will be randomly allocated 1:1 to receive a mixture with calories or receive a mixture without calories. Healthy controls will also be allocated to receive mixtures with/without calories. Mixtures will be standardised for taste and appearance, and allocation will be masked. The primary outcome measure is resting-state functional MRI 60 min post-consumption of the mixture. Secondary outcomes include (1) blood samples to study markers reflecting metabolic states, hunger/satiety and stress responses, (2) psychometric evaluations of subjective experiences and (3) assessment, in a second meal 3 h later, of the effects of previous calorie intake on subsequent food consumption. This article describes the study protocol, including the analysis plan, for a randomised controlled trial to comprehensively evaluate the effects of calorie intake in AN. The trial will distinguish psychological and metabolic neuronal networks associated with food intake and uncover how their integration affects food intake and other hallmark symptoms in AN. The aim is to accelerate treatment development by identifying brain mechanisms that drive AN.