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Inherited metabolic diseases

The inherited metabolic diseases (IMD) section publishes original research (clinical, biochemical, and genetic), well-phenotyped case series, clinical trial outcome reports, and comprehensive reviews of rare inherited disorders of metabolism.

Submissions that increase our understanding or make new observations regarding IMD are particularly welcome. Detailed natural history studies of well-phenotyped case series, and publication of consensus statements on investigation and management of IMD, including collaborations between centres, are encouraged.

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  1. Propionic acidemia (PA) and methylmalonic acidemia (MMA) are rare, autosomal recessive inborn errors of metabolism that require life-long medical treatment. The trial aimed to evaluate the effectiveness of the...

    Authors: Majid Alfadhel, Marwan Nashabat, Mohammed Saleh, Mohammed Elamin, Ahmed Alfares, Ali Al Othaim, Muhammad Umair, Hind Ahmed, Faroug Ababneh, Fuad Al Mutairi, Wafaa Eyaid, Abdulrahman Alswaid, Lina Alohali, Eissa Faqeih, Mohammed Almannai, Majed Aljeraisy…

    Citation: Orphanet Journal of Rare Diseases 2021 16:422

    Content type: Research

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  2. Biallelic variants in HSD3B7 cause 3β-hydroxy-Δ5-C27-steroid oxidoreductase (HSD3B7) deficiency, a life-threatening but treatable liver disease. The goal of this study was to obtain detailed information on the co...

    Authors: Jing Zhao, Kenneth D. R. Setchell, Ying Gong, Yinghua Sun, Ping Zhang, James E. Heubi, Lingjuan Fang, Yi Lu, Xinbao Xie, Jingyu Gong and Jian-She Wang

    Citation: Orphanet Journal of Rare Diseases 2021 16:417

    Content type: Research

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  3. Isobutyryl-CoA dehydrogenase deficiency (IBDD) is a rare autosomal recessive metabolic disorder resulting from variants in ACAD8, and is poorly understood, as only dozens of cases have been reported previously. B...

    Authors: Junqi Feng, Chenxi Yang, Ling Zhu, Yuchen Zhang, Xiaoxu Zhao, Chi Chen, Qi-xing Chen, Qiang Shu, Pingping Jiang and Fan Tong

    Citation: Orphanet Journal of Rare Diseases 2021 16:392

    Content type: Research

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  4. Zellweger spectrum disorders (ZSDs) are a rare, heterogenous group of autosomal recessively inherited disorders characterized by reduced peroxisomes numbers, impaired peroxisomal formation, and/or defective pe...

    Authors: Janaina Nogueira Anderson, Zineb Ammous, Yasemen Eroglu, Erick Hernandez, James Heubi, Ryan Himes and Sirish Palle

    Citation: Orphanet Journal of Rare Diseases 2021 16:388

    Content type: Review

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  5. Homozygous familial hypercholesterolemia (HoFH) is a rare life-threatening condition that represents a therapeutic challenge. The vast majority of HoFH patients fail to achieve LDL-C targets when treated with ...

    Authors: Laura D’Erasmo, Antonio Gallo, Angelo Baldassare Cefalù, Alessia Di Costanzo, Samir Saheb, Antonina Giammanco, Maurizio Averna, Alessio Buonaiuto, Gabriella Iannuzzo, Giuliana Fortunato, Arturo Puja, Tiziana Montalcini, Chiara Pavanello, Laura Calabresi, Giovanni Battista Vigna, Marco Bucci…

    Citation: Orphanet Journal of Rare Diseases 2021 16:381

    Content type: Research

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  6. Glycogen storage disease type I (GSD I) is a rare autosomal recessive disorder of carbohydate metabolism characterized by recurrent hypoglycaemia and hepatomegaly. Management of GSD I is demanding and comprise...

    Authors: Sven F. Garbade, Viviane Ederer, Peter Burgard, Udo Wendel, Ute Spiekerkoetter, Dorothea Haas and Sarah C. Grünert

    Citation: Orphanet Journal of Rare Diseases 2021 16:371

    Content type: Research

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  7. In classical phenylketonuria (PKU) phenylalanine (Phe) accumulates due to functional impairment of the enzyme phenylalanine hydroxylase caused by pathogenic variants in the PAH gene. PKU treatment prevents severe...

    Authors: Marion Herle, Michaela Brunner-Krainz, Daniela Karall, Bernadette Goeschl, Dorothea Möslinger, Joachim Zobel, Barbara Plecko, Sabine Scholl-Bürgi, Johannes Spenger, Saskia B. Wortmann and Martina Huemer

    Citation: Orphanet Journal of Rare Diseases 2021 16:367

    Content type: Research

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  8. In this response to the letter by Witters et al., we refer to the authors' arguments regarding spontaneous enhancement of glycosylation and the claim, that mannose has no place in the treatment of PMM2-CDG. Ou...

    Authors: Roman Taday, Julien H. Park, Marianne Grüneberg, Ingrid DuChesne, Janine Reunert and Thorsten Marquardt

    Citation: Orphanet Journal of Rare Diseases 2021 16:359

    Content type: Letter to the Editor

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  9. Cerebrotendinous xanthomatosis (CTX) is a rare, chronic, progressive, neurodegenerative disorder requiring life-long care. Patients with CTX often experience a diagnostic delay. Although early diagnosis and tr...

    Authors: Bianca M. L. Stelten, Maria Teresa Dotti, Aad Verrips, Bülent Elibol, Tzipora C. Falik-Zaccai, Kate Hanman, Andrea Mignarri, Belina Sithole, Robert D. Steiner, Surabhi Verma, Gilad Yahalom, Tanyel Zubarioglu, Fanny Mochel and Antonio Federico

    Citation: Orphanet Journal of Rare Diseases 2021 16:353

    Content type: Research

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  10. Alkaptonuria (AKU, OMIM 203500) is a rare congenital disorder caused by a deficiency of the enzyme homogentisate-1,2,-dioxygenase. The long-term consequences of AKU are joint problems, cardiac valve abnormalit...

    Authors: Bruce H. R. Wolffenbuttel, M. Rebecca Heiner-Fokkema and Francjan J. van Spronsen

    Citation: Orphanet Journal of Rare Diseases 2021 16:343

    Content type: Letter to the Editor

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  11. Glutaric acidemia type 1 (GA1) is a treatable disorder affecting cerebral organic acid metabolism caused by a defective glutaryl-CoA dehydrogenase (GCDH) gene. GA1 diagnosis reports following newborn screening (N...

    Authors: Yiming Lin, Wenjun Wang, Chunmei Lin, Zhenzhu Zheng, Qingliu Fu, Weilin Peng and Dongmei Chen

    Citation: Orphanet Journal of Rare Diseases 2021 16:339

    Content type: Research

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  12. Many surveys have been performed over the years to assess the medical and social requirements of patients with a rare disease, but no studies have focused specifically on patients in Europe or with an inherite...

    Authors: Sylvia Sestini, Laura Paneghetti, Christina Lampe, Gianni Betti, Simon Bond, Cinzia Maria Bellettato and Scarpa Maurizio

    Citation: Orphanet Journal of Rare Diseases 2021 16:336

    Content type: Research

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  13. To evaluate the clinical efficacy of haploidentical haematopoietic stem cell transplantation (haplo-HSCT) for the treatment of malignant infantile osteopetrosis (MIOP) and intermediate osteopetrosis.

    Authors: Guanghua Zhu, Ang Wei, Bin Wang, Jun Yang, Yan Yan, Kai Wang, Chenguang Jia, Yanhui Luo, Sidan Li, Xuan Zhou, Tianyou Wang, Huyong Zheng and Maoquan Qin

    Citation: Orphanet Journal of Rare Diseases 2021 16:314

    Content type: Research

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  14. No curative therapy for mitochondrial disease (MD) exists, prioritizing supportive treatment for symptom relief. In animal and cell models ketones decrease oxidative stress, increase antioxidants and scavenge ...

    Authors: Heidi Zweers, Annemiek M. J. van Wegberg, Mirian C. H. Janssen and Saskia B. Wortmann

    Citation: Orphanet Journal of Rare Diseases 2021 16:295

    Content type: Review

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    The Correction to this article has been published in Orphanet Journal of Rare Diseases 2021 16:397

  15. We investigated pathogenic DYRK1B variants causative of abdominal obesity-metabolic syndrome 3 (AOMS3) in a group of patients originally diagnosed with type 2 diabetes. All DYRK1B exons were analyzed in a sample ...

    Authors: Elvia C. Mendoza-Caamal, Francisco Barajas-Olmos, Elaheh Mirzaeicheshmeh, Ian Ilizaliturri-Flores, Carlos A. Aguilar-Salinas, Donaji V. Gómez-Velasco, Isabel Cicerón-Arellano, Adriana Reséndiz-Rodríguez, Angélica Martínez-Hernández, Cecilia Contreras-Cubas, Sergio Islas-Andrade, Carlos Zerrweck, Humberto García-Ortiz and Lorena Orozco

    Citation: Orphanet Journal of Rare Diseases 2021 16:291

    Content type: Research

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  16. While therapeutic advances have significantly improved the prognosis of patients with hereditary tyrosinemia type 1 (HT1), adherence to dietary and pharmacological treatments is essential for an optimal clinic...

    Authors: Domingo González-Lamuño, Paula Sánchez-Pintos, Fernando Andrade, María L. Couce and Luís Aldámiz-Echevarría

    Citation: Orphanet Journal of Rare Diseases 2021 16:256

    Content type: Research

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  17. Glycogen storage disease type 1a (GSD Ia) is characterized by severe fasting hypoglycemia. The clinical management includes the administration of uncooked cornstarch (UCCS). Although such a diet approach is ef...

    Authors: Vaneisse C. L. Monteiro, Bibiana M. de Oliveira, Bruna B. dos Santos, Fernanda Sperb-Ludwig, Lilia F. Refosco, Tatiele Nalin, Terry G. J. Derks, Carolina F. Moura de Souza and Ida V. D. Schwartz

    Citation: Orphanet Journal of Rare Diseases 2021 16:254

    Content type: Research

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  18. Phenylalanine hydroxylase (PAH) deficiency is an autosomal recessive disorder that results in elevated concentrations of phenylalanine (Phe) in the blood. If left untreated, the accumulation of Phe can result ...

    Authors: Pamela K. Foreman, Andrea V. Margulis, Kimberly Alexander, Renee Shediac, Brian Calingaert, Abenah Harding, Manel Pladevall-Vila and Sarah Landis

    Citation: Orphanet Journal of Rare Diseases 2021 16:253

    Content type: Research

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  19. Classic galactosemia (OMIM #230400) is an autosomal recessive disorder caused by homozygous or compound heterozygous pathogenic variants in the galactose-1-phosphate uridylyltransferase gene (GALT; 606999) on chr...

    Authors: Aleksandra Jezela-Stanek, Anna Bauer, Katarzyna Wertheim-Tysarowska, Jerzy Bal, Agnieszka Magdalena Rygiel and Jolanta Sykut-Cegielska

    Citation: Orphanet Journal of Rare Diseases 2021 16:239

    Content type: Research

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  20. Propionic acidemia (PA), an inborn error of metabolism, is caused by a deficiency in propionyl-CoA carboxylase. Patients have to follow a diet restricted in the propiogenic amino acids isoleucine (Ile), valine...

    Authors: Sinziana Stanescu, Amaya Belanger-Quintana, Borja Manuel Fernandez-Felix, Francisco Arrieta, Victor Quintero, Maria Soledad Maldonado, Patricia Alcaide and Mercedes Martínez-Pardo

    Citation: Orphanet Journal of Rare Diseases 2021 16:226

    Content type: Letter to the Editor

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  21. Beta-ketothiolase deficiency (BKTD) is an autosomal recessive disorder caused by biallelic mutation of ACAT1 that affects both isoleucine catabolism and ketolysis. There is little information available regarding ...

    Authors: Yiming Lin, Zhantao Yang, Chiju Yang, Haili Hu, Haiyan He, Tingting Niu, Mingfang Liu, Dongjuan Wang, Yun Sun, Yuyan Shen, Xiaole Li, Huiming Yan, Yuanyuan Kong and Xinwen Huang

    Citation: Orphanet Journal of Rare Diseases 2021 16:224

    Content type: Research

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  22. Chronic kidney disease (CKD) is one of the main long-term prognosis factors in methylmalonic acidemia (MMA), a rare disease of propionate catabolism. Our objective was to precisely address the clinical and bio...

    Authors: Myriam Dao, Jean-Baptiste Arnoux, Frank Bienaimé, Anaïs Brassier, François Brazier, Jean-François Benoist, Clément Pontoizeau, Chris Ottolenghi, Pauline Krug, Olivia Boyer, Pascale de Lonlay and Aude Servais

    Citation: Orphanet Journal of Rare Diseases 2021 16:220

    Content type: Research

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  23. Cobalamin (cbl)-related remethylation disorders are a heterogeneous group of inherited disorders comprising the remethylation of homocysteine to methionine and affecting multiple organ systems, most prominentl...

    Authors: Amelie S. Lotz-Havla, Katharina J. Weiß, Katharina A. Schiergens, Theresa Brunet, Jürgen Kohlhase, Stephanie Regenauer-Vandewiele and Esther M. Maier

    Citation: Orphanet Journal of Rare Diseases 2021 16:215

    Content type: Research

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  24. Alteration of vitamin B12 metabolism can be genetic or acquired, and can result in anemia, failure to thrive, developmental regression and even irreversible neurologic damage. Therefore, early diagnosis and inter...

    Authors: Sonia Pajares, Jose Antonio Arranz, Aida Ormazabal, Mireia Del Toro, Ángeles García-Cazorla, Aleix Navarro-Sastre, Rosa María López, Silvia María Meavilla, Mariela Mercedes de los Santos, Camila García-Volpe, Jose Manuel González de Aledo-Castillo, Ana Argudo, Jose Luís Marín, Clara Carnicer, Rafael Artuch, Frederic Tort…

    Citation: Orphanet Journal of Rare Diseases 2021 16:195

    Content type: Research

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  25. This study used quantitative and qualitative research methods to analyze how acute hepatic porphyria (AHP) affects patients with varying annualized porphyria attack rates. The overall impact of AHP on patients...

    Authors: Liz Gill, Sue Burrell, John Chamberlayne, Stephen Lombardelli, Jordanna Mora, Nicola Mason, Marieke Schurer, Madeline Merkel, Stephen Meninger and John J. Ko

    Citation: Orphanet Journal of Rare Diseases 2021 16:187

    Content type: Research

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  26. The Treatable ID App was created in 2012 as digital tool to improve early recognition and intervention for treatable inherited metabolic disorders (IMDs) presenting with global developmental delay and intelle...

    Authors: Eva M. M. Hoytema van Konijnenburg, Saskia B. Wortmann, Marina J. Koelewijn, Laura A. Tseng, Roderick Houben, Sylvia Stöckler-Ipsiroglu, Carlos R. Ferreira and Clara D. M. van Karnebeek

    Citation: Orphanet Journal of Rare Diseases 2021 16:170

    Content type: Review

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  27. Newborn screening for primary carnitine deficiency (NBS) is commonly implemented worldwide; however, it has poor sensitivity. This study aimed to evaluate the feasibility of improving screening by including a ...

    Authors: Yiming Lin, Weifeng Zhang, Chenggang Huang, Chunmei Lin, Weihua Lin, Weilin Peng, Qingliu Fu and Dongmei Chen

    Citation: Orphanet Journal of Rare Diseases 2021 16:149

    Content type: Research

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  28. PMM2-CDG is the most prevalent congenital disorder of glycosylation (CDG) with only symptomatic therapy. Some CDG have been successfully treated with D-galactose. We performed an open-label pilot trial with D-...

    Authors: Peter Witters, Hans Andersson, Jaak Jaeken, Laura Tseng, Clara D. M. van Karnebeek, Dirk J. Lefeber, David Cassiman and Eva Morava

    Citation: Orphanet Journal of Rare Diseases 2021 16:138

    Content type: Letter to the Editor

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  29. Parents of children with severe inborn errors of metabolism frequently face stressful events related to the disease of their child and are consequently at high risk for developing parental posttraumatic stress...

    Authors: Thirsa Conijn, Lotte Haverman, Frits A. Wijburg and Carlijn De Roos

    Citation: Orphanet Journal of Rare Diseases 2021 16:126

    Content type: Letter to the Editor

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  30. Combined methylmalonic acidemia and homocystinuria, cobalamin C type (cblC defect) is the most common inborn error of cobalamin metabolism, and different approaches have been applied to its prenatal diagnosis....

    Authors: Ting Chen, Lili Liang, Huiwen Zhang, Jun Ye, Wenjuan Qiu, Bing Xiao, Hong Zhu, Lei Wang, Feng Xu, Zhuwen Gong, Xuefan Gu and Lianshu Han

    Citation: Orphanet Journal of Rare Diseases 2021 16:125

    Content type: Research

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  31. The main genetic causes of homocystinuria are cystathionine beta-synthase (CBS) deficiency and the remethylation defects. Many patients present in childhood but milder forms may present later in life. Some cou...

    Authors: T. Morrison, F. Bösch, M. A. Landolt, V. Kožich, M. Huemer and A. A. M. Morris

    Citation: Orphanet Journal of Rare Diseases 2021 16:124

    Content type: Research

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  32. Adenylosuccinate lyase deficiency (ADSLD) is an ultrarare neurometabolic recessive disorder caused by loss-of-function mutations in the ADSL gene. The disease is characterized by wide clinical variability. Here w...

    Authors: Gerarda Mastrogiorgio, Marina Macchiaiolo, Paola Sabrina Buonuomo, Emanuele Bellacchio, Matteo Bordi, Davide Vecchio, Kari Payne Brown, Natalie Karen Watson, Benedetta Contardi, Francesco Cecconi, Marco Tartaglia and Andrea Bartuli

    Citation: Orphanet Journal of Rare Diseases 2021 16:112

    Content type: Research

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  33. Acute intermittent porphyria (AIP) is a genetic disease characterized by acute neurovisceral attacks. Long-term clinical conditions, chronic symptoms and impaired health related quality of life (HRQoL) have be...

    Authors: Juan Buendía-Martínez, María Barreda-Sánchez, Lidya Rodríguez-Peña, María Juliana Ballesta-Martínez, Vanesa López-González, María José Sánchez-Soler, Ana Teresa Serrano-Antón, María Elena Pérez-Tomás, Remedios Gil-Ferrer, Francisco Avilés-Plaza, Guillermo Glover-López, Carmen Carazo-Díaz and Encarna Guillén-Navarro

    Citation: Orphanet Journal of Rare Diseases 2021 16:106

    Content type: Research

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  34. A recent report on long-term dietary mannose supplementation in phosphomannomutase 2 deficiency (PMM2-CDG) claimed improved glycosylation and called for double-blind randomized study of the dietary supplement ...

    Authors: Peter Witters, Andrew C. Edmondson, Christina Lam, Christin Johnsen, Marc C. Patterson, Kimiyo M. Raymond, Miao He, Hudson H. Freeze and Eva Morava

    Citation: Orphanet Journal of Rare Diseases 2021 16:102

    Content type: Letter to the Editor

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  35. Following the broad application of new analytical methods, more and more pathophysiological processes in previously unknown diseases have been elucidated. The spectrum of clinical presentation of rare inherite...

    Authors: Thomas Opladen, Florian Gleich, Viktor Kozich, Maurizio Scarpa, Diego Martinelli, Franz Schaefer, Kathrin Jeltsch, Natalia Juliá-Palacios, Ángels García-Cazorla, Carlo Dionisi-Vici and Stefan Kölker

    Citation: Orphanet Journal of Rare Diseases 2021 16:95

    Content type: Research

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  36. In phenylketonuria (PKU), modified casein glycomacropeptide supplements (CGMP-AA) are used as an alternative to the traditional phenylalanine (Phe)-free L-amino acid supplements (L-AA). However, studies focusi...

    Authors: Maria João Pena, Alex Pinto, Manuela Ferreira de Almeida, Catarina de Sousa Barbosa, Paula Cristina Ramos, Sara Rocha, Arlindo Guimas, Rosa Ribeiro, Esmeralda Martins, Anabela Bandeira, Cláudia Camila Dias, Anita MacDonald, Nuno Borges and Júlio César Rocha

    Citation: Orphanet Journal of Rare Diseases 2021 16:84

    Content type: Research

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  37. Mucopolysaccharidosis type I-Hurler syndrome (MPSI-H) is a lysosomal storage disease characterized by severe physical symptoms and cognitive decline. Early treatment with hematopoietic cell transplant (HSCT) i...

    Authors: N. Guffon, M. Pettazzoni, N. Pangaud, C. Garin, G. Lina-Granade, C. Plault, C. Mottolese, R. Froissart and A. Fouilhoux

    Citation: Orphanet Journal of Rare Diseases 2021 16:60

    Content type: Research

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  38. We present baseline characteristics and follow-up data of a Managed Access Agreement (MAA), including patients with mucopolysaccharidosis IVA (MPS IVA) receiving elosulfase alfa enzyme replacement therapy (ERT...

    Authors: Maureen Cleary, James Davison, Rachel Gould, Tarekegn Geberhiwot, Derralynn Hughes, Jean Mercer, Alexandra Morrison, Elaine Murphy, Saikat Santra, James Jarrett, Swati Mukherjee and Karolina M. Stepien

    Citation: Orphanet Journal of Rare Diseases 2021 16:38

    Content type: Research

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  39. Repeated inflammation of the pancreas can cause pancreatitis or diabetes. It is well recognized that the organic acidemias may be complicated by pancreatitis but less recognized are other metabolic disorders i...

    Authors: Woo Jin Hwang, Han Hyuk Lim, Yoo-Mi Kim, Mea Young Chang, Hong Ryang Kil, Jae Young Kim, Wung Joo Song, Harvey L. Levy and Sook-Za Kim

    Citation: Orphanet Journal of Rare Diseases 2021 16:37

    Content type: Review

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  40. Phenylketonuria (PKU) is an autosomal recessive inherited disorder characterised by a deficiency in phenylalanine hydroxylase. Untreated, PKU is associated with a wide range of cognitive and psychiatric sequel...

    Authors: Nicholas M. Burgess, Wendy Kelso, Charles B. Malpas, Toby Winton-Brown, Timothy Fazio, Julie Panetta, Gerard De Jong, Joanna Neath, Sonny Atherton, Dennis Velakoulis and Mark Walterfang

    Citation: Orphanet Journal of Rare Diseases 2021 16:35

    Content type: Research

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  41. Long-chain fatty acid oxidation disorders (LC-FAOD) are a group of rare inborn errors of metabolism with autosomal recessive inheritance that may cause life-threatening events. Treatment with triheptanoin, a s...

    Authors: Thomas Zöggeler, Katharina Stock, Monika Jörg-Streller, Johannes Spenger, Vassiliki Konstantopoulou, Miriam Hufgard-Leitner, Sabine Scholl-Bürgi and Daniela Karall

    Citation: Orphanet Journal of Rare Diseases 2021 16:28

    Content type: Research

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  42. For many rare diseases, few treatments are supported by strong evidence. Patients, family members, health care providers, and policy-makers thus have to consider whether to accept, recommend, or fund treatment...

    Authors: Kylie Tingley, Doug Coyle, Ian D. Graham, Pranesh Chakraborty, Kumanan Wilson and Beth K. Potter

    Citation: Orphanet Journal of Rare Diseases 2021 16:26

    Content type: Research

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  43. Methylmalonic acidemia is an inherited organic acid metabolic disease. It involves multiple physiological systems and has variable manifestations. The primary causative gene MMUT carries wide range of mutations, ...

    Authors: Lili Liang, Ruixue Shuai, Yue Yu, Wenjuan Qiu, Linghua Shen, Shengnan Wu, Haiyan Wei, Yongxing Chen, Chiju Yang, Peng Xu, Xigui Chen, Hui Zou, Jizhen Feng, Tingting Niu, Haili Hu, Jun Ye…

    Citation: Orphanet Journal of Rare Diseases 2021 16:22

    Content type: Research

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  44. The congenital disorders of glycosylation (CDG) are a heterogeneous group of rare metabolic diseases with multi-system involvement. The liver phenotype of CDG varies not only according to the specific disorder...

    Authors: Rodrigo Tzovenos Starosta, Suzanne Boyer, Shawn Tahata, Kimiyo Raymond, Hee Eun Lee, Lynne A. Wolfe, Christina Lam, Andrew C. Edmondson, Ida Vanessa Doederlein Schwartz and Eva Morava

    Citation: Orphanet Journal of Rare Diseases 2021 16:20

    Content type: Research

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  45. Congenital disorders of glycosylation (CDG) result from defects in the synthesis of glycans and the attachment of glycans to proteins and lipids. Our study aimed to describe the clinical, biochemical, and mole...

    Authors: Anna Bogdańska, Patryk Lipiński, Paulina Szymańska-Rożek, Aleksandra Jezela-Stanek, Dariusz Rokicki, Piotr Socha and Anna Tylki-Szymańska

    Citation: Orphanet Journal of Rare Diseases 2021 16:17

    Content type: Research

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  46. In the Netherlands (NL) the government assigned 2 hospitals as centres of expertise (CE) for Phenylketonuria (PKU), while in the United Kingdom (UK) and Germany no centres are assigned specifically as PKU CE’s.

    Authors: A. M. J. van Wegberg, A. MacDonald, D. Abeln, T. S. Hagedorn, E. Lange, F. Trefz, D. van Vliet and F. J. van Spronsen

    Citation: Orphanet Journal of Rare Diseases 2021 16:2

    Content type: Research

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  47. The ongoing coronavirus disease 2019 (COVID-19) pandemic has caused disruption in all aspects of daily life, including the management and treatment of rare inherited metabolic disorders (IMDs). To perform a pr...

    Authors: C. Lampe, C. Dionisi-Vici, C. M. Bellettato, L. Paneghetti, C. van Lingen, S. Bond, C. Brown, A. Finglas, R. Francisco, S. Sestini, J. M. Heard and M. Scarpa

    Citation: Orphanet Journal of Rare Diseases 2020 15:341

    Content type: Letter to the Editor

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  48. This study aimed to describe the clinical and biochemical features of Chinese patients with ornithine transcarbamylase deficiency (OTCD), and to investigate the mutation spectrum of OTC gene and their potential c...

    Authors: Deyun Lu, Feng Han, Wenjuan Qiu, Huiwen Zhang, Jun Ye, Lili Liang, Yu Wang, Wenjun Ji, Xia Zhan, Xuefan Gu and Lianshu Han

    Citation: Orphanet Journal of Rare Diseases 2020 15:340

    Content type: Research

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  49. Cerebral creatine deficiency disorders (CCDD) are inherited metabolic disorders of creatine synthesis and transport. Urine creatine metabolite panel is helpful to identify these disorders.

    Authors: Shalini Bahl, Dawn Cordeiro, Lauren MacNeil, Andreas Schulze and Saadet Mercimek-Andrews

    Citation: Orphanet Journal of Rare Diseases 2020 15:339

    Content type: Research

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  50. Glutaric aciduria type 1 (GA-1) is a rare disease connected with speech delay and neurological deficits. However, the audiological and otologic profiles of GA-1 have not yet been fully characterized. To our kn...

    Authors: Yen-Chi Chen, Chii-Yuan Huang, Yen-Ting Lee, Chia-Hung Wu, Sheng-Kai Chang, Hsiu-Lien Cheng, Po-Hsiung Chang, Dau-Ming Niu and Yen-Fu Cheng

    Citation: Orphanet Journal of Rare Diseases 2020 15:337

    Content type: Research

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