Systematic Review of Signs and Symptoms Associated with Hematopoietic Stem Cell Transplantation-Associated Thrombotic Microangiopathy

Multicenter Study on Caregiver Experiences in Pediatric Hematopoietic Stem Cell Transplantation: Part II. Treatment Challenges, Communication Barriers, and Caregiver-Driven Approaches to Mitigation

Hematopoietic stem cell transplantation (HSCT) is a life-saving yet complex treatment for pediatric patients that introduces significant physical, emotional, and logistical challenges for caregivers. This multicenter, prospective qualitative longitudinal study explored caregiver experiences across four time points: pre-transplant (n=47), 30 days post-transplant (n=43), 100 days post-transplant (n=34), and six months post-transplant (n=26). Forty-nine caregivers participated in semi-structured interviews, which were transcribed and thematically analyzed. This manuscript encompasses the following themes that emerged from the interviews: treatment-related side effects and complications, communication gaps, and the impact of the COVID-19 pandemic. Caregiver priorities evolved over time, shifting from managing acute complications such as pain, infections, mucositis, and medication administration to addressing longer-term concerns like developmental delays, nutritional rehabilitation, and psychosocial adaptation. Caregivers reported challenges such as information overload, inconsistent messaging, and limited preparation for transitions in care. They employed various strategies to cope, including advocacy, peer support, and the use of healthcare team resources. These findings highlight the importance of stage-specific, tailored interventions to support caregivers throughout the HSCT journey. Clear communication, accessible education, and coordinated multidisciplinary care are essential to fostering caregiver resilience and improving patient and family-centered outcomes.

Neurological involvement in hematopoietic stem cell transplantation-associated thrombotic microangiopathy

Transplantation-associated thrombotic microangiopathy (TA-TMA) is a well-recognized serious complication of hematopoietic stem cell transplantation (HSCT). The understanding of TA-TMA pathophysiology has expanded in recent years. Dysregulation of the complement system is thought to cause endothelial injury and, consequently, microvascular thrombosis and tissue damage. TA-TMA can affect multiple organs, and each organ exhibits specific features of injury. Central nervous system (CNS) manifestations of TA-TMA include posterior reversible encephalopathy syndrome, seizures, and encephalopathy. The development of neurological dysfunction is associated with a significantly lower overall survival in patients with TA-TMA. However, there are currently no established histopathological or radiological criteria for the diagnosis of CNS TMA. Patients who receive total body irradiation (TBI), calcineurin inhibitors (CNI), and severe acute and chronic graft-versus-host disease (GVHD) are at a high risk of experiencing neurological complications related to TA-TMA and should be considered for directed TA-TMA therapy. However, the incidence and clinical manifestations of TA-TMA neurotoxicity remain unclear. Studies specifically examining the involvement of CNS in TMA syndromes are limited. In this review, we discuss clinical manifestations and imaging abnormalities in patients with nervous system involvement in TA-TMA. We summarize the mechanisms underlying TA-TMA and its neurological complications, including endothelial injury, evidence of complement activation, and treatment options for TA-TMA.

Neuro-oncologic Emergencies

OBJECTIVE

Neuro-oncologic emergencies have become more frequent as cancer remains one of the leading causes of death in the United States, second only to heart disease. This article highlights key aspects of epidemiology, diagnosis, and management of acute neurologic complications in primary central nervous system malignancies and systemic cancer, following three thematic classifications: (1) complications that are anatomically or intrinsically tumor-related, (2) complications that are tumor-mediated, and (3) complications that are treatment-related.

LATEST DEVELOPMENTS

The main driver of mortality in patients with brain metastasis is systemic disease progression; however, intracranial hypertension, treatment-resistant seizures, and overall decline due to increased intracranial burden of disease are the main factors underlying neurologic-related deaths. Advances in the understanding of tumor-specific characteristics can better inform risk stratification of neurologic complications. Following standardized grading and management algorithms for neurotoxic syndromes related to newer immunologic therapies is paramount to achieving favorable outcomes.

ESSENTIAL POINTS

Neuro-oncologic emergencies span the boundaries of subspecialties in neurology and require a broad understanding of neuroimmunology, neuronal hyperexcitability, CSF flow dynamics, intracranial compliance, and neuroanatomy.