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Mitochondrial Neurogastrointestinal Encephalomyopathy Imitating Crohn’s Disease: A Rare Cause of Malnutrition

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Lenka Kučerová1, Jiří Dolina1, Milan Dastych1, Daniel Bartušek2, Tomáš Honzík3, Jan Mazanec4, Lumír Kunovský1,5

1) Department of Gastroenterology, University Hospital Bohunice, Brno;
2) Department of Radiology, University Hospital Bohunice, Brno;
3) Department of Pediatrics and Adolescent Medicine, General University Hospital, Prague;
4) Department of Pathology, University Hospital Bohunice, Brno;
5) Department of Surgery, University Hospital Bohunice, Brno, Czech Republic

DOI: http://dx.doi.org/10.15403/jgld.2014.1121.273.kuc

ABSTRACT
Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE) is a rare autosomal recessive disease caused by a mutation in the TYMP gene encoding thymidine phosphorylase. MNGIE causes gastrointestinal and neurological symptoms in homozygous individuals and is often misdiagnosed as anorexia nervosa, inflammatory bowel disease, or celiac disease. We present the case of a 26-year-old female with MNGIE, who was initially diagnosed with anorexia nervosa and Crohn’s disease. The diagnosis of MNGIE was established by biochemical confirmation of elevated serum and urine thymidine and deoxyuridine levels after multiple examinations and several years of disease progression and ineffective treatment. Subsequent molecular genetic testing demonstrated a homozygous TYMP gene mutation. MNGIE should be considered in patients with unexplained malnutrition, intestinal dysmotility, and atypical neurological symptoms.

Key words: Genetic disease – MNGIE − thymidine phosphorylase − malnutrition − neuropathy − Crohn‘s disease − anorexia nervosa.

Abbreviations: BMI: Body mass index; CD: Crohn,s disease; CT: Computed tomography; GI: Gastrointestinal; MNGIE: Mitochondrial neurogastrointestinal encephalomyopathy; MRI: Magnetic resonance imaging; PEG: Percutaneous endoscopic gastrostomy; TP: Thymidine phosphorylase.