Adult‐onset neuroblastoma: Report of seven cases with molecular genetic characterization

Adolescent- and adult-onset neuroblastic tumor: A retrospective multicenter observational study of patients diagnosed in France between 2000 and 2020

BACKGROUND

Adult- and adolescent-onset neuroblastomas are rare, with no established therapy. In addition, rare pheochromocytomas may harbor neuroblastic components. This study was designed to collect epidemiological, diagnostic and therapeutic data in order to better define the characteristics of malignant peripheral neuroblastic tumors (MPNT) and composite pheochromocytomas (CP) with MPNT.

PROCEDURE

Fifty-nine adults and adolescents (aged over 15 years) diagnosed with a peripheral or composite neuroblastic tumor, who were treated in one of 17 institutions between 2000 and 2020, were retrospectively studied.

RESULTS

Eighteen patients with neuroblastoma (NB) or ganglioneuroblastoma (GNB) had locoregional disease, and 28 patients had metastatic stage 4 NB. Among the 13 patients with CP, 12 had locoregional disease. Fifty-eight percent of the population were adolescents and young adults under 24 years of age. The probability of 5-year event-free survival (EFS) was 40% (confidence interval: 27%-53%).

CONCLUSIONS

Outcomes were better for patients with localized tumor than for patients with metastases. For patients with localized tumor, in terms of survival, surgical treatment was the best therapeutic option. Multimodal treatment with chemotherapy, surgery, radiotherapy, and immunotherapy-based maintenance allowed long-term survival for some patients. Adolescent- and adult-onset neuroblastoma appeared to have specific characteristics associated with poorer outcomes compared to pediatric neuroblastoma. Nevertheless, complete disease control improved survival. The presence of a neuroblastic component in pheochromocytoma should be considered when making therapeutic management decisions. The development of specific tools/resources (Tumor Referral Board, Registry, biology, and trials with new agents or strategies) may help to improve outcomes for patients.

PHOX2B: a diagnostic cornerstone in neurocristopathies and neuroblastomas

Paired-like homeobox 2B (PHOX2B) is a gene essential in the development of the autonomic nervous system. PHOX2B mutations are associated with neurocristopathies-Hirschsprung disease (HSCR) and congenital central hypoventilation syndrome (CCHS)-and peripheral neuroblastic tumours. PHOXB2 plays an important role in the diagnostics of these conditions.Genotyping of a PHOX2B pathogenic variant is required to establish a diagnosis of CCHS. In HSCR patients, PHOX2B immunohistochemical staining has proven to be a valuable tool in identifying this disease. Furthermore, PHOXB2 is a predisposition gene for neuroblastoma, in which PHOX2B immunohistochemical staining can be used as a highly sensitive and specific diagnostic marker. The utility of PHOX2B immunohistochemistry in pheochromocytoma and paraganglioma has also been studied but yields conflicting results.In this review, an overview is given of PHOX2B, its associated diseases and the usefulness of PHOX2B immunohistochemistry as a diagnostic tool.

17q Gain in Neuroblastoma: A Review of Clinical and Biological Implications

Neuroblastoma (NB) is the most frequent extracranial solid childhood tumor. Despite advances in the understanding and treatment of this disease, the prognosis in cases of high-risk NB is still poor. 17q gain has been shown to be the most frequent genomic alteration in NB. However, the significance of this remains unclear because of its high frequency and association with other genetic modifications, particularly segmental chromosomal aberrations, 1p and 11q deletions, and MYCN amplification, all of which are also associated with a poor clinical prognosis. This work reviewed the evidence on the clinical and biological significance of 17q gain. It strongly supports the significance of 17q gain in the development of NB and its importance as a clinically relevant marker. However, it is crucial to distinguish between whole and partial chromosome 17q gains. The most important breakpoints appear to be at 17q12 and 17q21. The former distinguishes between whole and partial chromosome 17q gain; the latter is a site of IGF2BP1 and NME1 genes that appear to be the main oncogenes responsible for the functional effects of 17q gain.

Neuroblastoma in uncommon age group - A case series diagnosed on cytology

BACKGROUND

Neuroblastoma is the most common extracranial malignant neoplasm in early childhood. It is rare in the adult population.

AIMS AND OBJECTIVES

We aimed to study the incidence of neuroblastoma in the uncommon age group diagnosed on cytology.

MATERIALS AND METHODS

A prospective descriptive study spanning 2 years from December 2020 to January 2022 was done, in which neuroblastoma cases diagnosed by Fine needle aspiration cytology aged >12 years were collected. The clinical, cytomorphological and immunohistochemical findings were studied. Histopathological correlation was done wherever available.

RESULTS

We identified three cases of neuroblastoma during this period. Two cases were middle-aged adults, and one was an adolescent. All cases presented with abdominal masses and revealed small round cell tumor on cytology. Two cases fell into undifferentiated category and one case fell into the poorly differentiated subtype. All cases were positive for neuroendocrine markers. Histopathological correlation was available in two cases. MYC N amplification was absent in all cases.

CONCLUSION

It differs from pediatric neuroblastoma due to the lack of classical histomorphological features and molecular alterations. Adult-onset neuroblastomas carry a worse prognosis than childhood tumors.

Anaplastic Lymphoma Kinase Inhibitors for Therapy of Neuroblastoma in Adults

PURPOSE

Adult-onset neuroblastoma (AON) differs significantly in biology and clinical behavior from childhood-onset disease. AON poses therapeutic challenges since tolerance of intensive multimodality therapies that are standard of care for pediatric neuroblastoma (NB) is poor. AON is enriched for somatic mutations including anaplastic lymphoma kinase (ALK), deemed to be an oncogenic driver in NB. ALK inhibitors (ALKis), therefore, have the potential to be of therapeutic benefit. The purpose of this study is to report on their use in AON.

METHODS

A single-center retrospective review of adults with NB receiving ALKi (2012-2022) was performed. Response was evaluated using International Neuroblastoma Response Criteria.

RESULTS

Fifteen patients with ALK-mutated AON were treated with US Food and Drug Administration-approved ALKi starting at a median age of 34 (16-71) years. Initial ALKi was lorlatinib, crizotinib, and alectinib in seven, five, and three patients respectively; seven received multiple ALKis due to progressive disease/intolerability of one agent. All patients experienced ≥grade 2 adverse events (AEs): crizotinib and alectinib were associated primarily with gastrointestinal AEs, lorlatinib with neurologic AEs, weight gain, and hyperlipidemia resulting in dose reduction or discontinuation of ALKi in several patients. No responses were observed with crizotinib (n = 5 patients), ceritinib, alectinib, or brigatinib (n = 1 each). Of the 13 patients receiving lorlatinib, four, five, and four patients had a complete or partial response (major response rate 69%), and stable disease, respectively. Responses were noted in all disease compartments; complete metabolic response was seen in two L2 patients. Ten of 13 patients remain progression-free at a median of 19 (6-50) months on lorlatinib. Three (two receiving dose-reduced therapy) had progressive disease. Median survival from start of first ALKi was 43 ± 26 months.

CONCLUSION

ALKis, particularly lorlatinib, are effective treatment options for AON. However, AEs necessitating dose reduction are common.

Management of a Composite Pheochromocytoma (Pheochromocytoma/Neuroblastoma) in Adult Patient Recurring After Several Years: A Complex Case Report

Pheochromocytoma/neuroblastoma composite tumors are rare entities for which little is known. We report an atypical case of a 39-year-old man with secondary bone locations of a composite tumor, 7 years after resection of adrenal neuroblastoma, with constitutional alteration of SWI/SNF-related, matrix-associated, actin-dependent regulator of chromatin, subfamily A, member 4 whose role is unknown. The diagnosis of a peripheral neuroblastic tumor in adulthood is difficult and even more so when it is a composite tumor. In the absence of a standard of care, management is varied and discussions about treatment modalities for these patients are complex.

Targeting Oncogenic Transcriptional Networks in Neuroblastoma: From N-Myc to Epigenetic Drugs

Neuroblastoma (NB) is one of the most frequently occurring neurogenic extracranial solid cancers in childhood and infancy. Over the years, many pieces of evidence suggested that NB development is controlled by gene expression dysregulation. These unleashed programs that outline NB cancer cells make them highly dependent on specific tuning of gene expression, which can act co-operatively to define the differentiation state, cell identity, and specialized functions. The peculiar regulation is mainly caused by genetic and epigenetic alterations, resulting in the dependency on a small set of key master transcriptional regulators as the convergence point of multiple signalling pathways. In this review, we provide a comprehensive blueprint of transcriptional regulation bearing NB initiation and progression, unveiling the complexity of novel oncogenic and tumour suppressive regulatory networks of this pathology. Furthermore, we underline the significance of multi-target therapies against these hallmarks, showing how novel approaches, together with chemotherapy, surgery, or radiotherapy, can have substantial antineoplastic effects, disrupting a wide variety of tumorigenic pathways through combinations of different treatments.

Role of Notch pathway in effect of mono-2-ethylhexyl phthalate on the proliferation and cell cycle of SH-SY5Y cell

Neuroblastoma (NB) is an estrogen-dependent tumor. Mono-2-ethylhexyl phthalate (MEHP) has an estrogen-like effect. However, the effects of MEHP on the progression of NB are not well illustrated. This study was to clarify the effect of Notch pathway on proliferation and cell cycle of SH-SY5Y cell induced by MEHP. The viability of SH-SY5Y and BE2C cells were detected by CCK8; cell cycle and apoptosis were detected by flow cytometry; the protein expression levels of Notch pathway and cell cycle related proteins were detected by Western-blot. Results show that MEHP exposure can promote cell proliferation and altered the cell cycle. MEHP exposure can up-regulate the expression of C-MYC, Cyclin D1, Bcl-2 and affected the Notch pathway. In conclusion, MEHP exposure can promote NB cell proliferation and affect the cell cycle and apoptosis. Notch pathway plays a critical role in accelerating the cell cycle and inhibiting the apoptosis of SH-SY5Y cells caused by MEHP.

An elderly-onset neuroblastoma concomitant with minimal change nephrotic syndrome: the first autopsy case report

BACKGROUND

Neuroblastoma is a well-known embryonal cancer; however, adult-onset neuroblastomas are rare. The systemic symptoms are related to catecholamine excretion or intraabdominal mass effects. Only two cases of neuroblastoma with nephrotic syndrome have previously been reported. We herein present the first autopsy case of neuroblastoma in an older individual associated with minimal change nephrotic syndrome.

CASE PRESENTATION

A 63-year-old man was admitted to our hospital for investigation of general fatigue. His renal function was normal and his urine was negative for protein. A computed tomography scan showed a renal tumor and intraabdominal lymph node swelling. Approximately 4 months after admission, he suddenly developed acute renal failure and severe proteinuria, and hemodialysis was instituted. A computed tomography scan revealed an increase in the size of the renal tumor and lymph nodes. He died 1 month later and an autopsy was performed. The tumor exhibited diffuse proliferation of tumor cells with scant cytoplasm, namely small blue cell tumor with rosette formation. As a result of immunohistochemical study, a neuroblastoma was diagnosed. Despite the patient's severe renal failure, most glomeruli showed no remarkable changes. The tubular epithelium exhibited detachment and vacuolation. Electron microscopic study of the glomeruli showed diffuse effacement of the foot processes. These features indicate a diagnosis of minimal change nephrotic syndrome with acute tubular injury.

CONCLUSIONS

Minimal change nephrotic syndrome is the most common renal manifestation associated with lymphoproliferative malignancies. We here present an extremely rare case of adult-onset neuroblastoma with minimal change nephrotic syndrome.

Comparison of Incidence and Outcomes of Neuroblastoma in Children, Adolescents, and Adults in the United States: A Surveillance, Epidemiology, and End Results (SEER) Program Population Study

Background

This United States (U.S.) population study aimed to compare the incidence of neuroblastoma and outcomes in children, adolescents, and adults using the Surveillance, Epidemiology, and End Results (SEER) program database.

Material/Methods

Patients with neuroblastoma were identified in the SEER database from 1975 to 2013. According to the age at diagnosis, patients were divided into “Children” (≤14 years old) and “Adolescents/Adults” group (>14 years old). Then, comparisons in basic characteristics, incidence rates (IRs) and long-term survival outcomes between patients in 2 groups were made.

Results

A total of 4280 patients were identified, including 3998 children and 282 adolescent/adult patients. Adolescent/adult patients were more likely to have localized diseases than children and to be diagnosed with ganglioneuroblastoma (all P<0.05). The IR of neuroblastoma presented with upward and downward trends in children and adolescent/adult populations, respectively. Adolescents/adults had worse overall survival (OS) than children despite the earlier tumor stage. Lastly, multivariate Cox proportional hazards analyses showed that tumor stage, histology, sequence of primary malignancy, primary site, the administration of surgery, and treatment era were prognostic factors for children, and sequence of primary malignancy, primary site, undergoing surgery, and treatment era were tightly related to OS in adolescent/adult patients.

Conclusions

Analysis of the SEER program database between 1975 to 2013 showed that in the U.S., the incidence of neuroblastoma in children increased, but the incidence decreased in adolescents and adults. There was a trend for improved overall survival in all age groups despite the increased stage at presentation in children.