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Original Article
Endocrinology
Comparison of effectiveness of growth hormone therapy according to disease-causing genes in children with Noonan syndrome
Kyo Jin Jo, Yoo Mi Kim, Ju Young Yoon, Yeoun Joo Lee, Young Mi Han, Han-Wook Yoo, Hyang-Sook Kim, Chong Kun Cheon
Clin Exp Pediatr. 2019;62(7):274-280.   Published online December 3, 2018

Purpose: To analyze the growth response to growth hormone (GH) therapy in prepubertal patients with Noonan syndrome (NS) harboring different genetic mutations. Methods: Twenty-three patients with prepubertal NS treated at Pusan National University Children’s Hospital between March 2009 and July 2017 were enrolled. According to the disease-causing genes identified, the patients with NS were divided into 4 groups. Three groups were...
Review Article
Endocrinology
Management issues of congenital adrenal hyperplasia during the transition from pediatric to adult care
Jin-Ho Choi, Han-Wook Yoo
Clin Exp Pediatr. 2017;60(2):31-37.   Published online February 27, 2017

Steroid 21-hydroxylase deficiency is the most prevalent form of congenital adrenal hyperplasia (CAH), accounting for approximately 95% of cases. With the advent of newborn screening and hormone replacement therapy, most children with CAH survive into adulthood. Adolescents and adults with CAH experience a number of complications, including short stature, obesity, infertility, tumor, osteoporosis, and reduced quality of life. Transition from...

Case Report
Genetics and Metabolism
Long-term clinical course of a patient with mucopolysaccharidosis type IIIB
Ja Hye Kim, Yang Hyun Chi, Gu-Hwan Kim, Han-Wook Yoo, Jun Hwa Lee
Clin Exp Pediatr. 2016;59(Suppl 1):S37-S40.   Published online November 30, 2016

Mucopolysaccharidosis type III (MPS III) is a rare genetic disorder caused by lysosomal storage of heparan sulfate. MPS IIIB results from a deficiency in the enzyme alpha-N-acetyl-D-glucosaminidase (NAGLU). Affected patients begin showing behavioral changes, progressive profound mental retardation, and severe disability from the age of 2 to 6 years. We report a patient with MPS IIIB with a long-term follow-up...

Endocrinology
Phelan-McDermid syndrome presenting with developmental delays and facial dysmorphisms
Yoon-Myung Kim, In-Hee Choi, Jun Suk Kim, Ja Hye Kim, Ja Hyang Cho, Beom Hee Lee, Gu-Hwan Kim, Jin-Ho Choi, Eul-Ju Seo, Han-Wook Yoo
Clin Exp Pediatr. 2016;59(Suppl 1):S25-S28.   Published online November 30, 2016

Phelan-McDermid syndrome is a rare genetic disorder caused by the terminal or interstitial deletion of the chromosome 22q13.3. Patients with this syndrome usually have global developmental delay, hypotonia, and speech delays. Several putative genes such as the SHANK3, RAB, RABL2B, and IB2 are responsible for the neurological features. This study describes the clinical features and outcomes of Korean patients with...

Neurology
Two cases of familial cerebral cavernous malformation caused by mutations in the CCM1 gene
Im-Yong Yang, Mi-Sun Yum, Eun-Hee Kim, Hae-Won Choi, Han-Wook Yoo, Tae-Sung Ko
Clin Exp Pediatr. 2016;59(6):280-284.   Published online June 30, 2016

Cerebral cavernous malformation (CCM) is a vascular malformation characterized by abnormally enlarged capillary cavities without any intervening neural tissue. We report 2 cases of familial CCMs diagnosed with the CCM1 mutation by using a genetic assay. A 5-year-old boy presented with headache, vomiting, and seizure-like movements. Brain magnetic resonance imaging (MRI) revealed multiple CCM lesions in the cerebral hemispheres. Subsequent...

Original Article
Genetics and Metabolism
Identification of 1p36 deletion syndrome in patients with facial dysmorphism and developmental delay
Go Hun Seo, Ja Hye Kim, Ja Hyang Cho, Gu-Hwan Kim, Eul-Ju Seo, Beom Hee Lee, Jin-Ho Choi, Han-Wook Yoo
Clin Exp Pediatr. 2016;59(1):16-23.   Published online January 22, 2016
Purpose

The 1p36 deletion syndrome is a microdeletion syndrome characterized by developmental delays/intellectual disability, craniofacial dysmorphism, and other congenital anomalies. To date, many cases of this syndrome have been reported worldwide. However, cases with this syndrome have not been reported in Korean populations anywhere. This study was performed to report the clinical and molecular characteristics of five Korean patients with the...

Case Report
Successful sulfonylurea treatment in a patient with permanent neonatal diabetes mellitus with a novel KCNJ11 mutation
Sung Yeon Ahn, Gu-Hwan Kim, Han-Wook Yoo
Clin Exp Pediatr. 2015;58(8):309-312.   Published online August 21, 2015

Permanent neonatal diabetes mellitus refers to diabetes that occurs before the age of 6 months and persists through life. It is a rare disorder affecting one in 0.2-0.5 million live births. Mutations in the gene KCNJ11, encoding the subunit Kir6.2, and ABCC8, encoding SUR1 of the ATP-sensitive potassium (KATP) channel, are the most common causes of permanent neonatal diabetes mellitus....

Original Article
Lowe syndrome: a single center's experience in Korea
Hyun-Kyung Kim, Ja Hye Kim, Yoo-Mi Kim, Gu-Hwan Kim, Beom Hee Lee, Jin-Ho Choi, Han-Wook Yoo
Clin Exp Pediatr. 2014;57(3):140-148.   Published online March 31, 2014
Purpose

Lowe syndrome is a rare, X-linked recessive disorder caused by mutations in the OCRL gene. It involves multiple anatomic systems, particularly the eyes, central nervous system, and kidneys, and leads to profound growth failure and global developmental delay. This study evaluated the clinical and genetic characteristics of Korean patients with Lowe syndrome.

Methods

The clinical findings and results of genetic studies were...

Case Report
Chronic intermittent form of isovaleric aciduria in a 2-year-old boy
Jin Min Cho, Beom Hee Lee, Gu-Hwan Kim, Yoo-Mi Kim, Jin-Ho Choi, Han-Wook Yoo
Clin Exp Pediatr. 2013;56(8):351-354.   Published online August 27, 2013

Isovaleric aciduria (IVA) is caused by an autosomal recessive deficiency of isovaleryl-CoA dehydrogenase (IVD). IVA presents either in the neonatal period as an acute episode of fulminant metabolic acidosis, which may lead to coma or death, or later as a "chronic intermittent form" that is associated with developmental delays, with or without recurrent acidotic episodes during periods of stress, such...

Two cases of chronic pancreatitis associated with anomalous pancreaticobiliary ductal union and SPINK1 mutation
Eun Sam Rho, Earl Kim, Hong Koh, Han-Wook Yoo, Beom Hee Lee, Gu-Hwan Kim
Clin Exp Pediatr. 2013;56(5):227-230.   Published online May 28, 2013

Chronic pancreatitis is a progressive inflammatory disease resulting from repeated episodes of acute pancreatitis that impair exocrine function and eventually produce endocrine insufficiency. Some causes of chronic pancreatitis appear to be associated with alterations in the serine-protease inhibitor, Kazal type 1 (SPINK1), cationic trypsinogen (PRSS1), and cystic fibrosis-transmembrane conductance regulator (CFTR) genes, or with structural disorders in the pancreaticobiliary ductal...

X-linked recessive myotubular myopathy with MTM1 mutations
Young-Mi Han, Kyoung-Ah Kwon, Yun-Jin Lee, Sang-Ook Nam, Kyung-Hee Park, Shin-Yun Byun, Gu-Hwan Kim, Han-Wook Yoo
Clin Exp Pediatr. 2013;56(3):139-142.   Published online March 18, 2013

X-linked recessive myotubular myopathy (XLMTM) is a severe congenital muscle disorder caused by mutations in the MTM1 gene and characterized by severe hypotonia and generalized muscle weakness in affected males. It is generally a fatal disorder during the neonatal period and early infancy. The diagnosis is based on typical histopathological findings on muscle biopsy, combined with suggestive clinical features. We...

Magnetic resonance imaging and spectroscopic analysis in 5 cases of Pelizaeus-Merzbacher disease: metabolic abnormalities as diagnostic tools
Eun Lee, Mi-Sun Yum, Hae-Won Choi, Han-Wook Yoo, Su Jeong You, Eun-Hye Lee, Tae-Sung Ko
Clin Exp Pediatr. 2012;55(10):397-402.   Published online October 29, 2012

Pelizaeus-Merzbacher disease (PMD) is a rare, X-linked recessive disorder characterized by dysmyelination in the central nervous system. PMD results from deletion, mutation, or duplication of the proteolipid protein gene (PLP1) located at Xq22, leading to the failure of axon myelination by oligodendrocytes in the central nervous system. PMD may be suspected when there are clinical manifestations such as nystagmus, developmental...

Original Article
Clinical and genetic characteristics of Gaucher disease according to phenotypic subgroups
Ju-Young Lee, Beom Hee Lee, Gu-Hwan Kim, Chang-Woo Jung, Jin Lee, Jin-Ho Choi, Han-Wook Yoo
Clin Exp Pediatr. 2012;55(2):48-53.   Published online February 14, 2012
Purpose

Gaucher disease is caused by a β-glucocerebrosidase (GBA) deficiency. The aim of this study is to investigate the clinical and genetic characteristics according to subtypes of Gaucher disease in the Korean population.

Methods

Clinical findings at diagnosis, GBA mutations, and clinical courses were reviewed in 20 patients diagnosed with Gaucher disease.

Results

Eleven patients were diagnosed with non-neuronopathic type, 2 with acute neuronopathic type,...

Case Report
Transient neonatal diabetes mellitus with macroglossia diagnosed by methylation specific PCR (MS-PCR)
Hye Young Jin, Jin-Ho Choi, Gu-Hwan Kim, Han-Wook Yoo
Clin Exp Pediatr. 2010;53(3):432-436.   Published online March 15, 2010
Transient neonatal diabetes mellitus (TNDM) has been associated with paternal uniparental isodisomy of chromosome 6, paternally inherited duplication of 6q24, or a methylation defect at a CpG island of the ZAC or HYMAI gene. We experienced a case of TNDM in which the patient presented with hyperglycemia, macroglossia, and intrauterine growth retardation, caused by a paternally derived HYMAI. An 18-day-old...
Original Article
Endocrine dysfunction after bone marrow transplantation during childhood and adolescence
Hye Young Jin, Jin-Ho Choi, Ho-Joon Im, Jong-Jin Seo, Hyung-Nam Moon, Han-Wook Yoo
Clin Exp Pediatr. 2010;53(3):420-427.   Published online March 15, 2010
Purpose : Several complications can occur in patients who received bone marrow transplantation (BMT) during childhood and adolescence. This study aims to investigate endocrine dysfunctions after BMT so that better care can be provided to care for long-term survivors of BMT. Methods : One hundred patients (61 males, 39 females) were included in this study. Clinical parameters such as initial diagnosis,...
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