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Şıklar Z, Kontbay T, Dincaslan H, Ünal E, Berberoglu M. Clinic Heterogeneity and Management of Pediatric Patients With Germline RET Proto-oncogene Mutation: Single-center Experience. J Pediatr Hematol Oncol 2023; 45:e789-e797. [PMID: 37526376 DOI: 10.1097/mph.0000000000002728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 06/02/2023] [Indexed: 08/02/2023]
Abstract
Inherited forms of medullary thyroid carcinoma (MTC) can cause serious problems in diagnosis and follow-up. Family screening is performed, and prophylactic thyroidectomy at an appropriate age can be life-saving. This study aimed to investigate the diagnostic, clinical, laboratory characteristics, and treatment methods of cases with rearranged during transfection ( RET) mutation in the childhood age group. Patients diagnosed with hereditary MTC and patients who were evaluated by detecting MTC and/or RET mutations in their families were included in this study. Nine cases from 6 families were included in the study. Seven patients were evaluated as a result of screening, whereas 2 patients, one of whom was MEN2B, were symptomatic. Prophylactic thyroidectomy was performed in 7 cases. Medullary microcarcinoma was found in all, and additional papillary thyroid carcinoma in one. An inoperable tumor was detected in one patient, and sorafenib treatment was applied. A very heterogeneous clinical presentation can be seen in a group of pediatric patients with RET mutation. In rare RET mutations, the genotype-phenotype relationship is still unclear, and different clinical pictures can be seen. Although prophylactic thyroidectomy is life-saving, it can cause iatrogenic hypothyroidism and hypoparathyroidism. Concomitant papillary microcarcinomas may occur in very young children with germline RET mutation.
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Affiliation(s)
| | | | - Handan Dincaslan
- Pediatric Oncology, Ankara University School of Medicine, Cebeci, Ankara, Turkey
| | - Emel Ünal
- Pediatric Oncology, Ankara University School of Medicine, Cebeci, Ankara, Turkey
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Moore EC, Ioannou L, Ruseckaite R, Serpell J, Ahern S. Hereditary Endocrine Tumor Registries. J Endocr Soc 2022; 7:bvac194. [PMID: 36632485 PMCID: PMC9825730 DOI: 10.1210/jendso/bvac194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Indexed: 12/24/2022] Open
Abstract
Context Endocrine neoplasia syndromes are phenotypically complex, and there is a misconception that they are universally rare. Genetic alterations are increasingly recognized; however, true prevalence is unknown. The purpose of a clinical registry is to monitor the quality of health care delivered to a specified group of patients through the collection, analysis, and reporting of relevant health-related information. This leads to improved clinical practice, decision-making, patient satisfaction, and outcome. Objective This review aims to identify, compare, and contrast active registries worldwide that capture data relevant to hereditary endocrine tumors (HETs). Methods Clinical registries were identified using a systematic approach from publications (Ovid MEDLINE, EMBASE) peer consultation, clinical trials, and web searches. Inclusion criteria were hereditary endocrine tumors, clinical registries, and English language. Exclusion criteria were institutional audits, absence of clinical data, or inactivity. Details surrounding general characteristics, funding, data fields, collection periods, and entry methods were collated. Results Fifteen registries specific for HET were shortlisted with 136 affiliated peer-reviewed manuscripts. Conclusion There are few clinical registries specific to HET. Most of these are European, and the data collected are highly variable. Further research into their effectiveness is warranted. We note the absence of an Australian registry for all HET, which would provide potential health and economic gains. This review presents a unique opportunity to harmonize registry data for HET locally and further afield.
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Affiliation(s)
- Edwina C Moore
- Correspondence: Edwina C. Moore, MBBS (HONS), BMedSci, Peninsula Private Hospital, 525 McClelland Dr, Ste 16, Langwarrin, VIC, 3199, Australia.
| | - Liane Ioannou
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria 3800, Australia
| | - Rasa Ruseckaite
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria 3800, Australia
| | - Jonathan Serpell
- Department of Breast, Endocrine and General Surgery, Alfred Health, Monash University, Melbourne, Victoria 3800, Australia
| | - Susannah Ahern
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria 3800, Australia
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Kiriakopoulos A, Dimopoulou A, Nastos C, Dimopoulou D, Dimopoulou K, Menenakos E, Zavras N. Medullary thyroid carcinoma in children: current state of the art and future perspectives. J Pediatr Endocrinol Metab 2022; 35:1-10. [PMID: 34592078 DOI: 10.1515/jpem-2021-0502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 09/20/2021] [Indexed: 11/15/2022]
Abstract
Medullary thyroid carcinoma (MTC) is a distinct type of malignant thyroid tumor in cell origin, biological behavior, and natural history. It accounts for 1.6% of all thyroid cancers and presents either sporadically or as a hereditary disease, the latter occurring as a part of multiple endocrine neoplasia (MEN) 2A and MEN2B syndromes or as a familial MTC disease with no other manifestations. The gene responsible for the hereditary form is the rearranged during transfection (RET) gene, a proto-oncogene located to human chromosome 10. Most pediatric MTC cases have been discovered after genetic testing investigations, leading to the concept of prophylactic surgery in presymptomatic patients. Therefore, the genetic status of the child, along with serum calcitonin levels and ultrasonographic findings, determine the appropriate age for prophylactic surgical intervention. Nevertheless, a diagnosis at an early stage of MTC warrants total thyroidectomy and central lymph node dissection with the addition of lateral/contralateral lymph node dissection depending on the tumor size, ultrasonographic evidence of neck disease, or calcitonin levels. Conversely, locally advanced/unresectable or metastatic MTC is primarily treated with multikinase inhibitors, while more specific RET inhibitors are being tested in clinical trials with promising results.
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Affiliation(s)
- Andreas Kiriakopoulos
- Fifth Department of Surgery, "Evgenidion Hospital", National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - Anastasia Dimopoulou
- Department of Pediatric Surgery, University General Hospital "ATTIKON", National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - Constantinos Nastos
- Third Department of Surgery, University General Hospital "ATTIKON", National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - Dimitra Dimopoulou
- Second Department of Pediatrics, "P & A Kyriakou" Children's Hospital, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | | | - Evangelos Menenakos
- Fifth Department of Surgery, "Evgenidion Hospital", National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - Nikolaos Zavras
- Department of Pediatric Surgery, University General Hospital "ATTIKON", National and Kapodistrian University of Athens School of Medicine, Athens, Greece
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Prete A, Matrone A, Gambale C, Bottici V, Cappagli V, Romei C, Torregrossa L, Valerio L, Minaldi E, Campopiano MC, Lorusso L, Agate L, Molinaro E, Viola D, Ramone T, Mulè C, Ciampi R, Basolo F, Elisei R. Active Surveillance in RET Gene Carriers Belonging to Families with Multiple Endocrine Neoplasia. Cancers (Basel) 2021; 13:cancers13215554. [PMID: 34771717 PMCID: PMC8583610 DOI: 10.3390/cancers13215554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/02/2021] [Accepted: 11/04/2021] [Indexed: 12/18/2022] Open
Abstract
Simple Summary MEN2 has a very high penetrance for the development of medullary thyroid cancer. However, intra- and inter-familial variabilities have been described. Accordingly, in this precision medicine era, a personalized approach should be adopted in subjects harboring RET mutations. In these subjects, we showed that thyroid surgery could be safely timed according to basal and stimulated calcitonin, especially in children who can reach adulthood, avoiding the risks of thyroid surgery and decreasing the period of a long-life hypothyroidism treatment. Abstract Multiple Endocrine Neoplasia 2 (MEN2) is a hereditary cancer syndrome for developing medullary thyroid cancer (MTC) due to germline mutations of RET gene. Subjects harboring a germline RET mutation without any clinical signs of MTC are defined as gene carriers (GCs), for whom guidelines propose a prophylactic thyroid surgery. We evaluate if active surveillance of GCs, pursuing early thyroid surgery, can be safely proposed and if it allows safely delaying thyroid surgery in children until adolescence/adulthood. We prospectively followed 189 GCs with moderate or high risk germline RET mutation. Surgery was planned in case of: elevated basal calcitonin (bCT) and/or stimulated CT (sCT); surgery preference of subjects (or parents, if subject less than 18 years old); other reasons for thyroid surgery. Accordingly, at RET screening, we sub-grouped GCs in subjects who promptly were submitted to thyroid surgery (Group A, n = 67) and who were not (Group B, n = 122). Group B was further sub-grouped in subjects who were submitted to surgery during their active surveillance (Group B1, n = 22) and who are still in follow-up (Group B2, n = 100). Group A subjects presented significantly more advanced age, bCT and sCT compared to Group B. Mutation RETV804M was the most common variant in both groups but it was significantly less frequent in Group A than B. Analyzing age, bCT, sCT and genetic landscape, Group B1 subjects differed from Group B2 only for sCT at last evaluation. Group A subjects presented more frequently MTC foci than Group B1. Moreover, Group A MTCs presented more aggressive features (size, T and N) than Group B1. Accordingly, at the end of follow-up, all Group B1 subjects presented clinical remission, while 6 and 12 Group A MTC patients had structural and biochemical persistent disease, respectively. Thank to active surveillance, only 13/63 subjects younger than 18 years at RET screening have been operated on during childhood and/or adolescence. In Group B1, three patients, while actively surveilled, had the possibility to reach the age of 18 (or older) and two patients the age of 15, before being submitted to thyroid surgery. In Group B2, 12 patients become older than 18 years and 17 older than 15 years. In conclusion, we demonstrated that an active surveillance pursuing an early thyroid surgery could be safely recommended in GCs. This patient-centered approach permits postponing thyroid surgery in children until their adolescence/adulthood. At the same time, we confirmed that genetic screening allows finding hidden MTC cases that otherwise would be diagnosed much later.
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Affiliation(s)
- Alessandro Prete
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Antonio Matrone
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Carla Gambale
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Valeria Bottici
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Virginia Cappagli
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Cristina Romei
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Liborio Torregrossa
- Pathology Unit, Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, 56124 Pisa, Italy; (L.T.); (F.B.)
| | - Laura Valerio
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Elisa Minaldi
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Maria Cristina Campopiano
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Loredana Lorusso
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Laura Agate
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Eleonora Molinaro
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - David Viola
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Teresa Ramone
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Chiara Mulè
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Raffaele Ciampi
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
| | - Fulvio Basolo
- Pathology Unit, Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, 56124 Pisa, Italy; (L.T.); (F.B.)
| | - Rossella Elisei
- Endocrine Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy; (A.P.); (A.M.); (C.G.); (V.B.); (V.C.); (C.R.); (L.V.); (E.M.); (M.C.C.); (L.L.); (L.A.); (E.M.); (D.V.); (T.R.); (C.M.); (R.C.)
- Correspondence: ; Tel.: +39-050-544-723; Fax: +39-050-578-772
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Shankar A, Kurzawinski T, Ross E, Stoneham S, Beale T, Proctor I, Hulse T, Simpson K, Gaze MN, Cattaneo E, Gevers E, Marshall L, Hubbard JG, Brain C. Treatment outcome with a selective RET tyrosine kinase inhibitor selpercatinib in children with multiple endocrine neoplasia type 2 and advanced medullary thyroid carcinoma. Eur J Cancer 2021; 158:38-46. [PMID: 34649088 DOI: 10.1016/j.ejca.2021.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 09/03/2021] [Accepted: 09/11/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Medullary thyroid carcinoma (MTC) in the context of multiple endocrine neoplasia type 2 (MEN2) is caused by mutations in the RET proto-oncogene. Therefore, in children with MEN2 and advanced MTC, the RET tyrosine kinase (TK) pathway is a target for treatment with selpercatinib, a selective RET TK inhibitor. PATIENTS AND METHODS A retrospective review of the clinical, genetic, biochemical (calcitonin and carcinoembryonic antigen [CEA]) and imaging data of six medically untreated children with MEN2 and recurrent and or progressive MTC. The main parameters were safety and objective treatment response to selpercatinib. RESULTS Six children (three males and three females, aged 3-12 years), four with MEN2B and two MEN2A, are reported. All had initial total thyroidectomy and extensive neck dissections but subsequently developed recurrent and progressive disease. All experienced an improvement in clinical symptoms with a concomitant biochemical response evidenced by significant fall in serum calcitonin and CEA concentrations. The fall in serum calcitonin was evident within 2 weeks of the start of selpercatinib, and responses were ongoing at a median follow-up of 13 months (range, 11-22 months). Four children with measurable radiological disease had good volume reduction. The most common adverse effects were transient but reversible grade 1 or 2 increase in alanine aminotransferase, serum bilirubin and constipation. No child required a dose modification or had to discontinue selpercatinib because of a drug-related adverse event. CONCLUSION Selpercatinib has shown excellent therapeutic efficacy with minimal toxicity in children with MEN2 and progressive metastatic RET-mutated MTC.
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Affiliation(s)
- Ananth Shankar
- Children and Young People's Cancer Services, University College London Hospitals NHS Foundation Trust, London, UK.
| | - Tom Kurzawinski
- Department of Endocrine Surgery, University College London Hospitals NHS Foundation Trust, London, UK
| | - Emma Ross
- Department of Paediatric Oncology, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Sara Stoneham
- Children and Young People's Cancer Services, University College London Hospitals NHS Foundation Trust, London, UK
| | - Tim Beale
- Department of Head and Neck Radiology, University College London Hospitals NHS Foundation Trust, London, UK
| | - Ian Proctor
- Department of Cellular Pathology, University College London Hospitals NHS Foundation Trust, London, UK
| | - Tony Hulse
- Department of Paediatric Endocrinology, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Kate Simpson
- Department of Pharmacy, University College London Hospitals NHS Foundation Trust, London, UK
| | - Mark N Gaze
- Department of Oncology, University College London Hospitals NHS Foundation Trust, National Institute for Health Research University College London Hospitals Biomedical Research Centre, London, UK
| | - Elene Cattaneo
- Children's and Adolescent Services, East Suffolk and North Essex NHS Foundation Trust, Colchester, UK
| | - Evelien Gevers
- Centre for Endocrinology, William Harvey Research Institute, Queen Mary University of London and Department of Paediatric Endocrinology, Barts Health NHS Trust, London, UK
| | - Lynley Marshall
- Department of Paediatric and Adolescent Oncology, The Royal Marsden NHS Foundation Trust, Sutton and The Institute of Cancer Research, London, UK
| | | | - Caroline Brain
- Department of Paediatric Endocrinology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
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Redlich A, Pamporaki C, Lessel L, Frühwald MC, Vorwerk P, Kuhlen M. Pseudohypoxic pheochromocytomas and paragangliomas dominate in children. Pediatr Blood Cancer 2021; 68:e28981. [PMID: 33682326 DOI: 10.1002/pbc.28981] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Pheochromocytomas and paragangliomas (PPGLs) are rare neuroendocrine tumors that are associated with cancer predisposition syndromes in up to 80% of affected children. PPGLs can be divided into molecularly defined groups with comparable pathogenesis and biology: (1) pseudohypoxic, (2) kinase signaling, and (3) Wnt-altered. METHODS We report the data of children and adolescents diagnosed with PPGL who have been registered with the German GPOH-MET registry since 1997. RESULTS By December 2019, a total of 88 patients with PPGL were reported. Pheochromocytoma occurred in 56%, paraganglioma in 35%, and synchronous PPGLs in 9.1%. A total of 16% of patients presented with lymph node (5.7%) and distant metastases (10%). Median follow-up was 4.2 years (range 0-17.1). Overall and disease-free survival (DFS) were 98.6% and 54.0%, respectively. Local relapses, metastases, and subsequent PPGLs occurred in 11%, 4.5%, and 15% of patients. Germline mutations were detected in 83% of patients (51% in VHL, 21% in SDHB, 7.8% in SDHD, and one patient each in RET and NF1). One patient was diagnosed with Pacak-Zhuang syndrome. A total of 96% of patients presented with PPGL of the pseudohypoxic subgroup (34% TCA cycle-related, 66% VHL/EPAS1-related). In multivariate analyses, extent of tumor resection was a significant prognostic factor for DFS. CONCLUSIONS Most pediatric PPGLs belong to the pseudohypoxia subgroup, which is associated with a high risk of subsequent PPGL events and metastatic disease. Comprehensive molecular profiling of children and adolescents with newly diagnosed PPGLs will open new avenues for personalized diagnosis, treatment, and surveillance.
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Affiliation(s)
- Antje Redlich
- Pediatric Oncology Department, Otto von Guericke University Children's Hospital, Magdeburg, Germany
| | - Christina Pamporaki
- Department of Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Lienhard Lessel
- Pediatric Oncology Department, Otto von Guericke University Children's Hospital, Magdeburg, Germany
| | - Michael C Frühwald
- Paediatric and Adolescent Medicine, University Medical Center, Augsburg, Germany
| | - Peter Vorwerk
- Pediatric Oncology Department, Otto von Guericke University Children's Hospital, Magdeburg, Germany
| | - Michaela Kuhlen
- Paediatric and Adolescent Medicine, University Medical Center, Augsburg, Germany
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