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Nephrology (Genitourinary)
Pulmonary thromboembolism: a rare but life-threatening complication of nephrotic syndrome
Heeyeon Cho
Clin Exp Pediatr. 2021;64(8):406-407.   Published online February 4, 2021
Pulmonary thromboembolism (PTE) is often diagnosed in children with nephrotic syndrome. Massive PTE can cause hemodynamic instability, right ventricular failure, and circulatory collapse. Extracorporeal membrane oxygenation can be used for massive PTE as a method of hemodynamic support and adjunct to surgical embolectomy.
Original Article
Nephrology (Genitourinary)
Clinical manifestations of BK virus infection in pediatric kidney transplant patients
Yiyoung Kwon, Jeong Yeon Kim, Yeonhee Lee, Heeyeon Cho
Clin Exp Pediatr. 2019;62(11):422-427.   Published online September 5, 2019
Background: Polyomavirus BK (BKV) infection is an important cause of graft loss in kidney transplant patients.
Purpose: The purpose of this study was to evaluate clinical findings and risk factors for BKV in pediatric patients after kidney transplantation. Methods: This retrospective single-center study included 31 pediatric kidney transplant recipients from January 2002 to December 2017. Two patients received 2 transplantations during the...
Review Article
Nephrology (Genitourinary)
Renal replacement therapy in neonates with an inborn error of metabolism
Heeyeon Cho
Clin Exp Pediatr. 2019;62(2):43-47.   Published online November 7, 2018
Hyperammonemia can be caused by several genetic inborn errors of metabolism including urea cycle defects, organic acidemias, fatty acid oxidation defects, and certain disorders of amino acid metabolism. High levels of ammonia are extremely neurotoxic, leading to astrocyte swelling, brain edema, coma, severe disability, and even death. Thus, emergency treatment for hyperammonemia must be initiated before a precise diagnosis is...
Original Article
Nephrology (Genitourinary)
Acute kidney injury in pediatric patients with rhabdomyolysis
Young Shin Lim, Heeyeon Cho, Sang Taek Lee, Yeonhee Lee
Clin Exp Pediatr. 2018;61(3):95-100.   Published online March 19, 2018
Purpose

This study aimed to evaluate the clinical findings in pediatric rhabdomyolysis and the predictive factors for acute kidney injury (AKI) in Korean children.

Methods

Medical records of 39 Korean children, who were newly diagnosed with rhabdomyolysis from January 2008 to December 2015, were retrospectively analyzed. The diagnosis was made from the medical history, elevated serum creatinine kinase level >1,000 IU/L, and plasma...

Case Report
Nephrology (Genitourinary)
Posterior reversible encephalopathy syndrome caused by presumed Takayasu arteritis
Ki Wuk Lee, Sang Taek Lee, Heeyeon Cho
Clin Exp Pediatr. 2016;59(Suppl 1):S145-S148.   Published online November 30, 2016

Takayasu arteritis (TA) is a chronic inflammatory disease of unknown etiology that affects mainly the aorta, main aortic branches, and pulmonary arteries. Diverse neurological manifestations of TA have rarely been reported in children. Posterior reversible encephalopathy syndrome (PRES) is a neuroradiological condition that presents with headache, seizure, visual disturbances, and characteristic lesions on imaging. Inflammatory condition and severe hypertension in...

A novel mutation of CLCNKB in a Korean patient of mixed phenotype of Bartter-Gitelman syndrome
Hee-Won Cho, Sang Taek Lee, Heeyeon Cho, Hae Il Cheong
Clin Exp Pediatr. 2016;59(Suppl 1):S103-S106.   Published online November 30, 2016

Bartter syndrome (BS) is an inherited renal tubular disorder characterized by low or normal blood pressure, hypokalemic metabolic alkalosis, and hyperreninemic hyperaldosteronism. Type III BS is caused by loss-of-function mutations in CLCNKB encoding basolateral ClC-Kb. The clinical phenotype of patients with CLCNKB mutations has been known to be highly variable, and cases that are difficult to categorize as type III...

Plasmaphresis therapy for pulmonary hemorrhage in a pediatric patient with IgA nephropathy
Dae-Kyoon Yim, Sang-Taek Lee, Heeyeon Cho
Clin Exp Pediatr. 2015;58(10):402-405.   Published online October 21, 2015

IgA nephropathy usually presents as asymptomatic microscopic hematuria or proteinuria or episodic gross hematuria after upper respiratory infection. It is an uncommon cause of end-stage renal failure in childhood. Pulmonary hemorrhage associated with IgA nephropathy is an unusual life-threatening manifestation in pediatric patients and is usually treated with aggressive immunosuppression. Pulmonary hemorrhage and renal failure usually occur concurrently, and the...

Review Article
Complement regulation: physiology and disease relevance
Heeyeon Cho
Clin Exp Pediatr. 2015;58(7):239-244.   Published online July 22, 2015

The complement system is part of the innate immune response and as such defends against invading pathogens, removes immune complexes and damaged self-cells, aids organ regeneration, confers neuroprotection, and engages with the adaptive immune response via T and B cells. Complement activation can either benefit or harm the host organism; thus, the complement system must maintain a balance between activation...

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