An unusual presentation of hepatitis A virus infection: Guillain-Barré syndrome.
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Child, Preschool↗
Biomedical subjects
Hüseyin Tan
Publications and source records attributed to Hüseyin Tan.
Morphological alterations produced by zinc deficiency in rat sciatic nerve: a histological, electron microscopic, and stereological study.
Zinc (Zn) is an essential trace element for humans and animals. It is required for normal growth, gene expression, wound healing, protein metabolism, immune function, and membrane integrity. In this study, unbiased stereological methods have been used to quantify the effects of Zn deficiency on the sectioned surface area and the number of myelinated axons in the sciatic nerve of rats. Animals were fed a Zn-deficient or Zn-sufficient diet for a period of 4 weeks. At the end of this time, the samples of sciatic nerves were removed from the animals, processed for electron microscopy and embedded in resin. The Zn-deficient group of rats was found to have a lower body weight compared to rats in the control group (P < 0.05). The sectioned surface area of nerve cross-section and myelinated axon number in Zn-deficient rats decreased by 20% and 29%, respectively, compared to the control group. A significant correlation between sectioned surface area and myelinated axon number was also determined. Morphological findings were as follows: on light microscopy, it was determined that certain abnormalities occur specifically in the experimental group, such as collapsed nerve fascicles, irregular profiles of and degeneration in myelin sheaths, and on electron microscopy, extensive myelin damage was seen in Zn-deficient groups compared with control groups. This study suggests that peripheral nerves require Zn for development and preservation of their structure.
Animals↗
A rare complication of hepatitis A: pleural effusion.
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Child↗
Idiopathic unilateral paralysis of the palate in childhood.
Idiopathic soft palate paralysis is an isolated clinical entity of unknown cause. Typical clinical features are sudden onset, rhinolalia, and nasal escape of fluids from the ipsilateral nostril. The disorder affects mainly male children at the ages of 2 to 3 years and resolves spontaneously. This report presents a 5-year-old female with the rare disorder and discusses its probable physiopathologic mechanisms.
Child, Preschool↗
Acute hydrocephalus caused by mumps meningoencephalitis.
Hydrocephalus is a rare complication of mumps. We report an 8.5-year-old boy with acute hydrocephalus associated with mumps meningoencephalitis.
Acute Disease↗
Valproate-induced insulin resistance in prepubertal girls with epilepsy.
Valproate is commonly used for treatment of a variety of seizure types in both children and adults. However, if the medication is started before the age of 20 years, it may affect reproductive endocrine functions. In order to investigate the possible role of valproate treatment in the development of obesity, hyper-insulinism and polycystic ovaries, we studied metabolic parameters and ovarian morphology/size in prepubertal girls with epilepsy. Our study included 14 girls with epilepsy and 15 healthy age-matched controls. The age of the patients ranged from 7 years to 13 years. Mean body weight, fasting serum insulin and glucose levels and HOMA index of girls in the study group were significantly greater than those of the control girls (p < 0.05). Serum androstenedione, prolactin and free testosterone were significantly lower in the VPA-treated girls than in the controls, whereas SHBG level was higher (p < 0.05). There was no difference between the groups for ovarian morphology. In conclusion, our findings showed that valproate treatment may lead to hyperinsulinemia and hypoandrogenism during the prepubertal period. This emphasizes that a mature adult endocrine system may not be necessary for the development of VPA-related hyperinsulinemia.
Adolescent↗
Lamivudine and thrombotic thrombocytopenic purpura: cause or coincidence.
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Adolescent↗
Tourette's syndrome manifests as chronic persistent cough.
Tourette's syndrome (TS) is a neuropsychiatric disorder characterized by the presence of involuntary motor and phonic tics. Phonic tics can mimic respiratory system disorders such as asthma, and upper and lower respiratory system infections. We report on twins with chronic persistent cough (CPC): one of whom was followed as an asthmatic for a year and the other was diagnosed with recurrent respiratory tract infection. A careful history and neurologic assessment suggested that TS might be responsible for the first twin's symptoms but that the second one was probably in early TS. All the symptoms of the first patient diagnosed as TS showed a complete improvement with pharmacological treatment in two weeks. Since the history of CPC may in reality be TS, we recommend that TS should be considered in the differential diagnosis of pediatric CPC.
Child↗
Variant late infantile neuronal ceroid lipofuscinosis in a subset of Turkish patients is allelic to Northern epilepsy.
Childhood-onset neuronal ceroid lipofuscinoses (NCL) are a group of autosomal recessive progressive encephalopathies characterized by the accumulation of autofluorescent material in various tissues, notably in neurons. Based on clinical features, the country of origin of patients, and the molecular genetic background of the disorder, at least seven different forms are thought to exist. Northern epilepsy is a novel form of NCL so far described only in Finland, where all patients are homozygous for a missense mutation in the CLN8 gene. A variant form of late infantile NCL (vLINCL) present in Turkish patients has been considered a distinct clinical and genetic entity among the NCL, the underlying gene (CLN7) being unknown. Recently, we reported homozygosity over the Northern epilepsy CLN8 gene region on 8p23 in four out of five Turkish vLINCL families studied. However, no common mutation in CLN8 was found in these families. We have now extended the Turkish vLINCL family panel to 18 families, of which only one is nonconsanguineous. Nine families were excluded from CLN8 by lack of homozygosity. In the remaining families, four CLN8 gene mutations were identified indicating that in a subset of patients with Turkish vLINCL, the disorder is allelic to Northern epilepsy. There is no apparent genotype-phenotype correlation among the Turkish patients with CLN8 mutations, although their phenotype is distinct from that of Finnish Northern epilepsy patients. The molecular genetic background of the Turkish vLINCL families not linked to CLN8 remains to be clarified.
Adolescent↗
Parents' attitudes toward performance of lumbar puncture on their children.
We studied the attitudes of 87 parents who had the choice to watch their children's single or multiple lumbar punctures (LPs). Anxiety scores were moderate, higher before LP than after, and were unaffected by the number or observation. Parents who observed the LP wished doing likewise in the future.
Adolescent↗
Acute disseminated encephalomyelitis following hepatitis A virus infection.
Acute disseminated encephalomyelitis is an immune-mediated demyelinating disorder usually encountered in children or adolescents and characterized by multifocal neurologic deficits of rapid onset. It is often preceded by various infectious diseases or vaccination, but acute disseminated encephalomyelitis developing after hepatitis A virus infection is rare. We present such a case in a 9-year-old patient who illustrates the importance of considering acute disseminated encephalomyelitis in patients who develop multifocal neurologic signs after hepatitis A virus infection. We suggest that patients with acute disseminated encephalomyelitis be screened for hepatitis A virus because of the occurrence of asymptomatic hepatitis A virus infection.
Administration, Oral↗
Central pontine myelinolysis central pontine myelinolysis manifesting with massive myoclonus.
Central pontine myelinolysis is a rare neurologic disorder defined by symmetric demyelination in the central base of the pons. It usually manifests with neurologic signs such as impaired consciousness, ataxia, spastic quadriparesis, pseudobulbar signs, and the locked-in syndrome which is related to a disconnection syndrome at the pontine level. We report a 17-month-old patient with kwashiorkor and hyponatremia who developed acute massive myoclonus. Magnetic resonance imaging revealed a central pontine lesion. Central pontine myelinolysis is rare in infants, with only a few cases reported in the literature so far. This report presents the first infantile case of central pontine myelinolysis manifesting with massive myoclonus.
Humans↗
Pyridoxine-dependent seizures and microcephaly.
Pyridoxine dependency is a rare autosomal-recessive disorder causing intractable seizures in neonates and infants. This case report describes an infant with pyridoxine-dependent seizures with microcephaly and discusses a probable pathogenetic mechanism of microcephaly in this condition.
Humans↗
Pseudotumor cerebri secondary to subacute sclerosing panencephalitis.
Pseudotumor cerebri is characterized by signs of raised intracranial pressure occurring in the absence of obvious brain pathology. We present an 8-year-old boy with pseudotumor cerebri secondary to subacute sclerosing panencephalitis. The reported patient suggests a possible association between subacute sclerosing panencephalitis and pseudotumor cerebri and that subacute sclerosing panencephalitis should be added to the list of disorders known to be associated with pseudotumor cerebri. Patients with subacute sclerosing panencephalitis might benefit from treatment aimed at increased intracranial pressure.
Child↗
Gingival enlargement in children treated with antiepileptics.
This study was conducted to determine the occurrence, severity, and risk factors of gingival enlargement in children treated with valproate and other nonvalproate antiepileptic drugs. A cross-sectional study was carried out in which data obtained from 68 epileptic children under treatment were compared with those from 50 controls. A structured questionnaire was used to collect data on patients' demographics, dental and oral hygiene practices, and medication history. Gingival enlargement, gingival index, plaque index, and probing depth were measured to assess periodontal health. The chi-square and Fisher exact tests were used in statistical analysis. In case of significance, a detailed chi-square analysis was carried out to determine the origin of the difference. Patients in both the valproate and nonvalproate groups showed significantly higher gingival enlargement, gingival index, plaque scores, and pocketing (P < .001 and P < .01, respectively) than the control group. In the valproate group, the duration of the treatment had a significant effect on gingival enlargement (P < .001) but not on gingival index, plaque index, and probing depth values (P > .05). Toothbrushing was most frequent in the control group (P = .000) and more frequent in the valproate group than the nonvalproate group (P = .024). Our study showed significant differences regarding gingival enlargement in children treated with valproate. These findings illustrate that epileptic children on valproate are at risk of periodontal problems.
Anticonvulsants↗
Pulmonary atresia/ventricular septal defect associated with facial port-wine stain and retinal vascular abnormality: a new constellation?
A case with pulmonary atresia/ventricular septal defect associated with port-wine stain and retinal vascular abnormality is reported. Clinical findings were similar to both PHACE syndrome and Sturge-Weber syndrome (SWS). But, the most frequent and well-known features of both syndromes were absent. So, it could not be concluded whether this is a new constellation or an incomplete form of one of the two syndromes. In both situations, presence of a complex congenital heart disease that has not been reported previously makes this case original.
Abnormalities, Multiple↗
Rhabdomyolysis in celiac disease.
A 12-year-old female presented with chronic diarrhea, fatigue, failure to thrive, sudden weakness of her upper and lower extremities and inability to walk. On neurological examination, atrophy was found of the lower extremity muscles, coupled with muscle weakness. Hypokalemia and a high creatine kinase (CK) level were detected. Antigliadin IgA, IgG and antiendomysial antibodies were positive. A duodenal biopsy revealed the classical findings of celiac disease. To our knowledge this is the first childhood case of celiac disease presenting with rhabdomyolysis.
Celiac Disease↗
Miller Fisher syndrome with negative anti-GQ1b immunoglobulin G antibodies.
Miller Fisher syndrome is characterized by a triad of ataxia, ophthalmoplegia, and reduced or absent tendon reflexes, with minimal if any limb weakness. Anti-GQ1b immunoglobulin G antibodies are present in high titers in most patients. Presented is a two-year-old female with Miller Fisher syndrome whose blood serum was negative for anti-GQ1b immunoglobulin G antibodies.
Child, Preschool↗