Clinical and Laboratory ObservationsL-2-Hydroxyglutaric Aciduria and Brain Tumors: A Case Report and Review of the LiteratureYazici, Nalan MD*; Sarialioğlu, Faik MD*; Alkan, Özlem MD†; Kayaselçuk, Fazilet MD†; Erol, İlknur MD‡Author Information Departments of *Pediatric Oncology †Radiology ‡Pediatric Neurology, Başkent University Faculty of Medicine, Ankara, Turkey Reprints: Nalan Yazici, MD, Altaycesme Mah. Geyve Sk. Yasamkent Sitesi Yeşim Apt. No: 24; 34843 Maltepe, İstanbul, Turkey (e-mail: firstname.lastname@example.org). Received for publication September 24, 2008 accepted April 4, 2009 Journal of Pediatric Hematology/Oncology: November 2009 - Volume 31 - Issue 11 - p 865-869 doi: 10.1097/MPH.0b013e3181b258c6 Buy Metrics Abstract Heritable diseases associated with childhood tumors are sometimes defined as a probable etiologic factor or a coincidence. First of all, we must know the actual number of patients. Herein a case with medulloblastoma associated with L-2-hydroxyglutaric aciduria is reported for this purpose. A 5-year-old boy was admitted with nausea, vomiting, and lethargy. In medical history, consanguinity and siblings with mental-motor retardation and epilepsy are remarkable. Growth retardation, macrocephaly, lethargy, tremor, bilateral nistagmus, and papilledema were prominent features in physical examination. Noncontrast computed tomography of the brain showed a hyper dense mass in the cerebellar vermis. Gross total resection was made and the histopathology of the tumor was medulloblastoma. Besides medical history and physical findings, radiologic white matter changes in the subcortical, periventricular regions, bilateral basal ganglia, and caudate nuclei in magnetic resonance images other than tumor led us to investigate the child for L-2-hydroxyglutaric aciduria. The level of the 2-OH glutaric acid was determined as being 12-fold high in the urine. Chemo-radiotherapy was performed after surgery. Our case was the third patient with medulloblastoma in the literature and is still alive with no evidence of the disease 19 months after the initial diagnosis. © 2009 Lippincott Williams & Wilkins, Inc.