Long-Term Follow-Up of Pediatric CNS Tumor Survivors—A Selection of Relevant Long-Term Issues

Pediatric CNS Radiation Oncology: Recent Developments and Novel Techniques

Radiation therapy (RT) is a cornerstone in the management of pediatric central nervous system (CNS) tumors. Recent advancements in RT delivery and techniques aim to enhance therapeutic effectiveness while minimizing both acute and long-term complications associated with pediatric brain RT. This paper highlights innovative developments in the field, including the clinical indications, benefits, and challenges of proton therapy and stereotactic radiotherapy. The ongoing refinement of risk-adapted RT volumes is highlighted, with examples of newly proposed germinoma RT volumes and hippocampal-sparing RT. Additionally, emerging experimental approaches, including FLASH therapy and theranostics, are also discussed as promising future directions. Further prospective, multi-institutional collaborative studies are essential to validate and expand upon the benefits outlined in this review.

Pediatric central nervous system (CNS) tumors cognitive and psychosocial assessment: key highlights from the Italian (AIEOP) consensus conference

Pediatric central nervous system (CNS) tumors represent one of the most intricate challenges faced by children and their families in the context of cancer illness. In Italy, the psychosocial working group (GDL) of the AIEOP, composed by professionals (psycho-oncologists/neuropsychologists) involved in the care pathways of patients with CNS tumors, has initiated a consensus process regarding the psychological/neuropsychological assessment of CNS patients to improve accessibility to standardized and shared protocols. Standardized psychological and neuropsychological instruments are proposed in the document, which provides for a selection in a tailor-made approach that is simultaneously shared by various centers.

Relationships between cognitive flexibility performance and adaptive behavior outcomes in survivors of pediatric brain tumor

Objective: Survivors of pediatric brain tumors are at increased risk of executive function (EF) and adaptive behavior difficulties. While previous research suggests that executive dysfunction impacts suboptimal adaptive outcomes, the specific elements of EF influencing this relationship remain unexplored. This study examines the relationship between cognitive flexibility and adaptive behavior in survivors compared to healthy controls. Methods: 86 survivors (Mage(SD)=23.41(4.24), 44 females) and 86 controls (Mage(SD)=23.09(4.50), 44 females) completed the Delis-Kaplan Executive Function System Trail Making Test (TMT) and Verbal Fluency Test (VFT). The Letter-Number Sequencing (LNS) and Category Switching (CS) conditions were isolated as measures of cognitive flexibility. Informants provided responses to obtain adaptive behavior ratings using the Scales of Independent Behavior-Revised (SIB-R). Linear regressions explored relationships between cognitive flexibility and SIB-R scores in survivors compared to controls. Results: For both TMT and VFT, the relationship between cognitive flexibility and adaptive behavior was significantly different between survivors and controls for SIB-R scores in Social Communication, Community Living, and Personal Living Skills (p<.0125). Survivors' better LNS performance predicted greater SIB-R scores across the same 3 domains (all p= <.001, r2semipartial=.08). Similarly, survivors' better CS performance predicted greater SIB-R scores across the same 3 domains (p = 0.002 to .02, r2semipartial =.03 to .04). No significant relationships were found in controls (all p >.05). After adjusting for working memory and inhibitory control, most relationships remained significant in survivors (p= <.001 to .046, r2semipartial=.02 to .08). Conclusion: These findings reveal a robust, positive relationship between cognitive flexibility performance and adaptive behaviors specific to survivors.

Rare Coexistence: Pilocytic Astrocytoma With Atypical Teratoid/Rhabdoid Tumor Features in an Infant

This case report describes the presentation, diagnostic evaluation, and management challenges encountered in an eight-month-old female infant with fever, seizure, and a large cystic brain lesion initially diagnosed as pilocytic astrocytoma but later demonstrating atypical teratoid/rhabdoid tumor (AT/RT) features on histopathological examination-the infant presented with a fever and cold persisting for 10 days, followed by a seizure episode. Laboratory investigations revealed abnormalities, including anemia and leukocytosis. Imaging studies identified a large cystic lesion causing hydrocephalus. Despite initial treatment, the patient continued to experience seizures, prompting surgical intervention. Debulking surgery was performed, resulting in postoperative motor deficits. Subsequent imaging revealed persistent lesions, leading to further surgical intervention with shunt placement. Histopathological examination confirmed pilocytic astrocytoma with features suggestive of AT/RT. Despite counseling regarding poor prognosis and recommendations for chemotherapy, the parents declined further treatment, and the patient was discharged. This case underscores the diagnostic complexity and therapeutic dilemmas associated with rare histological overlaps in pediatric brain tumors, emphasizing the importance of multidisciplinary collaboration and tailored treatment strategies for optimal patient care.

Life after paediatric brain tumour; the perspectives of the survivors and their parents

AIMS

To explore how long-term and late effects of paediatric brain tumours influence the everyday lives of survivors at various ages and their parents.

DESIGN

A qualitative interview study using reflexive thematic analysis.

METHODS

We conducted individual interviews and focus groups with 14 paediatric brain tumour survivors aged 9-52 years and 16 parents, which were audiorecorded and transcribed. We inductively analyzed the data using Braun and Clarke's reflexive thematic analysis. Inductively derived themes were then mapped onto the components of the International Classification of Functioning, Disability and Health framework to examine the survivors' everyday functioning.

RESULTS

All survivors experienced ongoing long-term and late effects but with considerable variations in how these restricted the survivors' functioning and thus their ability to participate in everyday life activities (e.g. social, educational and work activities). All survivors expressed an explicit focus on and use of different strategies to manage their perceived functional limitations and participation restrictions. Many survivors expressed discrepancies between their own goals, expectations and actual abilities post-cancer; making them very aware of their limitations. In addition, many survivors and parents experienced ongoing concerns about the survivors' future, including the risk of late effects, relapse or other complications.

CONCLUSION

A wide range of long-term and late effects continue to affect the survivors and their parents' functioning and everyday lives. Their ongoing needs emphasize the importance of comprehensive, life-long follow-up care, as recommended.

IMPLICATIONS FOR THE PROFESSION AND/OR PATIENT CARE

The complex challenges across the biopsychosocial realms faced by the survivors supports the call for multidisciplinary survivorship care. Nurses are well positioned to lead such care, as they are trained to provide holistic care and thereby support survivors' functioning and activity participation in everyday life.

REPORTING METHOD

We used the COREQ guidelines when reporting the study.

PATIENT OR PUBLIC CONTRIBUTION

Two user representatives (one young adult PBT survivor and one mother of a PBT survivor) ensured the relevance and quality of the semi-structured interview guides prior to the interviews with the survivors and parents. The guides were sent to the user representatives by mail, and they provided their written feedback by mail to the first author.

Nanoparticles for Drug and Gene Delivery in Pediatric Brain Tumors' Cancer Stem Cells: Current Knowledge and Future Perspectives

Primary malignant brain tumors are the most common solid neoplasm in childhood. Despite recent advances, many children affected by aggressive or metastatic brain tumors still present poor prognosis, therefore the development of more effective therapies is urgent. Cancer stem cells (CSCs) have been discovered and isolated in both pediatric and adult patients with brain tumors (e.g., medulloblastoma, gliomas and ependymoma). CSCs are a small clonal population of cancer cells responsible for brain tumor initiation, maintenance and progression, displaying resistance to conventional anticancer therapies. CSCs are characterized by a specific repertoire of surface markers and intracellular specific pathways. These unique features of CSCs biology offer the opportunity to build therapeutic approaches to specifically target these cells in the complex tumor bulk. Treatment of pediatric brain tumors with classical chemotherapeutic regimen poses challenges both for tumor location and for the presence of the blood-brain barrier (BBB). Lastly, the application of chemotherapy to a developing brain is followed by long-term sequelae, especially on cognitive abilities. Novel avenues are emerging in the therapeutic panorama taking advantage of nanomedicine. In this review we will summarize nanoparticle-based approaches and the efficacy that NPs have intrinsically demonstrated and how they are also decorated by biomolecules. Furthermore, we propose novel cargoes together with recent advances in nanoparticle design/synthesis with the final aim to specifically target the insidious CSCs population in the tumor bulk.