Sentinel report of uniquely paired collision tumors: glioblastoma multiforme and coexistent intraventricular subependymoma. Illustrative case

BACKGROUND

The presence of intracranial collision tumors, histologically distinct tumors occurring in anatomical proximity, is quite rare. Herein, the authors describe the sentinel case of a contiguous collision tumor combination consisting of glioblastoma multiforme and intraventricular subependymoma.

OBSERVATIONS

A 67-year-old male presented with several months of progressive fatigue superimposed on more recently noted word-finding difficulty, slight left-sided weakness, and episodic confusion. He was found to have a large right frontal mass abutting the right lateral ventricle with an additional nodular focus of enhancement within the right frontal horn. The patient underwent an awake right frontal craniotomy for gross-total resection of the tumor, noted to be of two distinct histological identities.

LESSONS

Although exceptionally rare, primary glial neoplasms of various histologies can be encountered simultaneously during resection, as in this case of co-occurring glioblastoma of the right frontal lobe and right frontal horn intraventricular subependymoma. Close attention to tumoral locations and the gross appearance of specimens during resection can prime the operative neurosurgeon for success in contributing to accurate diagnoses through sending separate pathological specimens for histological analysis when qualitatively different tissue is suspected.

The role of the right to life in respect of deaths caused by negligence in the healthcare context

This article investigates the question of whether a death caused by negligence in the healthcare context is capable of violating the right to life under Article 2 of the European Convention on Human Rights. This provision imposes extensive positive obligations upon Contracting States, including an operational duty to take reasonable steps to save a life that they know, or ought to know, is at risk. This article addresses the question of exactly when such an operational duty arises, with particular focus on the healthcare context in which deaths caused by medical negligence have not traditionally been regarded as amounting to violations of the right to life. This article argues that two key factors in determining the existence of an operational duty to save life are the assumption of responsibility and nature of risk. It also argues for the need to take surrounding circumstances into account and for an increased use of the right to life in holding public bodies to account for deaths caused by negligence in the healthcare context.

Novel insights into diminished cardiac reserve in non-obstructive hypertrophic cardiomyopathy from four-dimensional flow cardiac magnetic resonance component analysis

AIMS

Hypertrophic cardiomyopathy (HCM) is characterized by hypercontractility and diastolic dysfunction, which alter blood flow haemodynamics and are linked with increased risk of adverse clinical events. Four-dimensional flow cardiac magnetic resonance (4D-flow CMR) enables comprehensive characterization of ventricular blood flow patterns. We characterized flow component changes in non-obstructive HCM and assessed their relationship with phenotypic severity and sudden cardiac death (SCD) risk.

METHODS AND RESULTS

Fifty-one participants (37 non-obstructive HCM and 14 matched controls) underwent 4D-flow CMR. Left-ventricular (LV) end-diastolic volume was separated into four components: direct flow (blood transiting the ventricle within one cycle), retained inflow (blood entering the ventricle and retained for one cycle), delayed ejection flow (retained ventricular blood ejected during systole), and residual volume (ventricular blood retained for >two cycles). Flow component distribution and component end-diastolic kinetic energy/mL were estimated. HCM patients demonstrated greater direct flow proportions compared with controls (47.9 ± 9% vs. 39.4 ± 6%, P = 0.002), with reduction in other components. Direct flow proportions correlated with LV mass index (r = 0.40, P = 0.004), end-diastolic volume index (r = -0.40, P = 0.017), and SCD risk (r = 0.34, P = 0.039). In contrast to controls, in HCM, stroke volume decreased with increasing direct flow proportions, indicating diminished volumetric reserve. There was no difference in component end-diastolic kinetic energy/mL.

CONCLUSION

Non-obstructive HCM possesses a distinctive flow component distribution pattern characterised by greater direct flow proportions, and direct flow-stroke volume uncoupling indicative of diminished cardiac reserve. The correlation of direct flow proportion with phenotypic severity and SCD risk highlight its potential as a novel and sensitive haemodynamic measure of cardiovascular risk in HCM.

Association between common cardiovascular risk factors and clinical phenotype in patients with hypertrophic cardiomyopathy from the European Society of Cardiology (ESC) EurObservational Research Programme (EORP) Cardiomyopathy/Myocarditis registry

AIMS

The interaction between common cardiovascular risk factors (CVRF) and hypertrophic cardiomyopathy (HCM) is poorly studied. We sought to explore the relation between CVRF and the clinical characteristics of patients with HCM enrolled in the EURObservational Research Programme (EORP) Cardiomyopathy registry.

METHODS AND RESULTS

1739 patients with HCM were studied. The relation between hypertension (HT), diabetes (DM), body mass index (BMI), and clinical traits was analysed. Analyses were stratified according to the presence or absence of a pathogenic variant in a sarcomere gene. The prevalence of HT, DM, and obesity (Ob) was 37, 10, and 21%, respectively. HT, DM, and Ob were associated with older age (P<0.001), less family history of HCM (HT and DM P<0.001), higher New York Heart Association (NYHA) class (P<0.001), atrial fibrillation (HT and DM P<0.001; Ob p = 0.03) and LV (left ventricular) diastolic dysfunction (HT and Ob P<0.001; DM P = 0.003). Stroke was more frequent in HT (P<0.001) and mutation-positive patients with DM (P = 0.02). HT and Ob were associated with higher provocable LV outflow tract gradients (HT P<0.001, Ob P = 0.036). LV hypertrophy was more severe in Ob (P = 0.018). HT and Ob were independently associated with NYHA class (OR 1.419, P = 0.017 and OR 1.584, P = 0.004, respectively). Other associations, including a higher proportion of females in HT and of systolic dysfunction in HT and Ob, were observed only in mutation-positive patients.

CONCLUSION

Common CVRF are associated with a more severe HCM phenotype, suggesting a proactive management of CVRF should be promoted. An interaction between genotype and CVRF was observed for some traits.

Pharmacological strategies for improving the prognosis of glioblastoma

Introduction: Treatments for brain cancer have radically evolved in the past decade due to a better understanding of the interplay between the immune system and tumors of the central nervous system (CNS). However, glioblastoma multiforme (GBM) remains the most common and lethal CNS malignancy affecting adults.Areas covered: The authors review the literature on glioblastoma pharmacologic therapies with a focus on trials of combination chemo-/immunotherapies and drug delivery platforms from 2015 to 2021.Expert opinion: Few therapeutic advances in GBM treatment have been made since the Food and Drug Administration (FDA) approval of the BCNU-eluting wafer, Gliadel, in 1996 and oral temozolomide (TMZ) in 2005. Recent advances in our understanding of GBM have promoted a wide assortment of new therapeutic approaches including combination therapy, immunotherapy, vaccines, and Car T-cell therapy along with developments in drug delivery. Given promising preclinical data, these novel pharmacotherapies for the treatment of GBM are currently being evaluated in various stages of clinical trials.

An NHS Trust and others v Y and another [2018] UKSC 46: Reducing the Role of the Courts in Treatment Withdrawal

In An NHS Trust and others v Y and another, the Supreme Court was asked to address the question of whether a court order must always be obtained before clinically assisted nutrition and hydration (CANH), which is keeping alive a person with a prolonged disorder of consciousness (PDOC). This case note explores the Court's decision to dispense with the need for such a court order and analyses that important change in approach from the perspective of the right to life protected in Article 2 European Convention on Human Rights (ECHR) as well as in the broader context of end of life decision-making.

Right to receive treatment in accordance with the Human Rights Act 1998

The question of whether a patient can rely upon a right to treatment in the courts is a topical and controversial one. This article provides a short summary of the current law on this issue and concludes that, while there is no substantive right to treatment as such, the courts are increasingly willing to enforce procedural requirements onto those bodies that make funding decisions. These procedural requirements seek to ensure that each patient is assessed on the basis of his or her individual clinical needs. Blanket policies against funding particular treatments are not permitted, but neither are funding decisions based on exceptional personal (non-clinical) circumstances. Individual clinical needs are always relevant and must be taken into account. Provided that the body making funding decisions satisfies this requirement, the courts will be reluctant to intervene with decisions about the provision of medical treatment.

The greater good?: issues of proportionality and democracy in the doctrine of necessity as applied in Re A

This article examines the criminal law doctrine of necessity as applied in the conjoined twins case (Re A (Children) (Conjoined Twins: Surgical Separation) [2000] 4 All ER 961). It determines that the public law principle of proportionality underlies the doctrine, but identifies the preservation of life as the guiding principle behind the Court of Appeal's use of necessity in Re A. The article is critical of this elevation of the preservation of life under the doctrine of necessity and argues for an alternative conception of necessity based upon fundamental constitutional principles such as human rights and democracy. The principle of democracy has particular pertinence to the issue of necessity because it may be endangered by this common law justificatory defence. This conflict between democracy and necessity, it is argued, further supports the need for the constitutional value of democracy to play a key role in any application of necessity in future cases.