• Childhood Kidney Diseases
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• 제27권2호
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• pp.121-126
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• 2023

The administration of angiotensin type 2 receptor blockers (ARBs) during pregnancy is known to cause ARB fetopathy, including renal insufficiency. We aimed to analyze the outcomes of two patients who survived ARB fetopathy and perform an accompanying literature review. Case 1 was exposed antenatally from a gestational age of 30 weeks to valsartan because of maternal pregnancy-induced hypertension. The patient presented with oliguria immediately after birth, and renal replacement therapy was administered for 24 days. Seven years after birth, renal function was indicative of stage 2 chronic kidney disease (CKD) with impaired urinary concentration. Case 2 had a maternal history of hypertension and transient ischemic attack and was treated with olmesartan until 30 weeks of pregnancy. Renal replacement therapy was performed for 4 days since birth. After 8 years, the patient is with CKD stage 2, with intact tubular function. Recent reports suggest that ARB fetopathy might manifest as renal tubular dysgenesis and nephrogenic diabetes insipidus, in contrast to mild alterations of glomerular filtration. Tubular dysfunction may induce CKD progression and growth retardation. Patients with ARB fetopathy should be monitored until adulthood. The ARB exposure period might be a critical factor in determining the severity and manifestations of fetopathy.

• Childhood Kidney Diseases
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• 제2권1호
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• pp.90-94
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• 1998

Hinman syndrome is a condition representing urinary voiding dysfunction in the neurologically intact child. The syndrome is probably caused by acquired behavioral and psychosocial disorders manifested by bladder and/or bowel dysfunction mimicking neurologic disease. Clinically, the symptom complex may include day and night time enuresis, encopresis, constipation, and recurrent urinary tract infections. Cystoscopy frequently demonstrates normal vesicourethral anatomy. Voiding films usually demonstarate a carrot-shaped proximal urethra with a persistent narrowing at the external sphincter. The bladder is large and often appears trabeculated with a thickened wall and significant postvoid residual. A 13-year-old male child was admitted due to fever, urinary tract infection, enuresis and flank pain. His neurologic examination was normal. Renal sonograms showed moderate hydronephrosis. Voiding cystourethrograms showed a huge, trabeculated bladder without vesicourethral reflux and urethral valves. No abnormal findings was found in spinal MRI.

• Childhood Kidney Diseases
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• 제21권2호
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• pp.41-46
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• 2017

Purpose: Thin glomerular basement membrane nephropathy (TBMN) is, along with the IgA nephropathy, the most common cause of asymptomatic hematuria in Korean children. TBMN is usually a benign renal disease not requiring treatment and is associated with a good prognosis, but some cases hematuria is indicative of a state of progressive renal insufficiency. We aimed to retrospectively evaluate clinical manifestations and renal prognosis of patients with TBMN. Methods: Among the 428 renal biopsies performed on children at Yeungnam University Hospital between January 2000 and February 2017, 167 patients were diagnosed as having TBMN. We retrospectively investigated 167 pediatric patients and identified 59 children with follow-up duration >3 years. Results: Among 59 patients, there were 33 boys and 26 girls. Mean age of onset of hematuria was $7.18{\pm}2.64$ years, and mean time from onset of disease until a renal biopsy was performed was $2.48{\pm}2.10$ years. There were no clinical features or laboratory findings among studied children to indicate decreased renal function during follow-up; however, one case progressed to chronic kidney disease (CKD) due to an unknown cause. There were seven patients among these related a positive family history of hematuria or renal insufficiency. Concluson: Although almost all patients had normal renal functions during follow-up, there were one patient who progressed to CKD and seven patients with family history of hematuria or renal insufficiency. Moreover, four among the 428 patients over 17 years underwent repeat renal biopsies, which showed results different from their earlier biopsies.Thus, large-scales studies may be required to determine long-term prognosis of TBMN in children, and further evaluation for Alport syndrome in TBMN cases is essential.

• Clinical and Experimental Pediatrics
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• 제50권2호
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• pp.178-181
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• 2007

목 적: 결절성 경화증은 신경 피부 증후군의 대표적인 질환으로, 중추 신경계 외에도 신장, 심장 등 여러 장기를 침범한다. 신장에서 발견되는 종양은 혈관근지방종, 신 낭종 및 신세포암 등이 있으며, 혈관근지방종의 합병증은 결절성 경화증 환자의 예후에 중요한 인자이다. 저자는 결절성 경화증 환자들을 다년간 추적 관찰하며 다양한 임상 양상 중, 신장에서의 발현과 그 예후를 분석하여 보고자 하였다. 방 법: 2001년 3월부터 2005년 10월까지 세브란스 병원 소아과에 입원하여 결절성 경화증으로 진단 및 치료받은 19명의 환자를 대상으로 후향적 의무기록 고찰을 통해 분석하였다. 모든 환자들은 복부 초음파검사 또는 복부 컴퓨터 단층 촬영검사 등의 신장학적인 검사를 주기적으로 반복 시행하였다. 결 과: 총 19명중 남자 13명, 여자 6명으로 성비는 2.2:1이었다. 총 11례(57.9%) 의 환자에서 신장의 이상이 발견되었으며, 혈관근지방종 9례(47.4%), 단순 신 낭종 1례(5.3%), 수신증 1례(5.3%)가 있었다. 혈관근지방종으로 진단될 당시의 평균 연령은 8.7세(3-19세)였으며, 출혈이 동반된 환자는 없었다. 2례의 환자가 신동맥 색전술을 시행받았으며, 1례의 환자는 신절제술 후 만성 신부전증으로 이행되었다. 결 론: 결절성 경화증 환자들에서의 신장을 비롯한 타 장기들에서의 발현을 염두에 두어야 하며, 복부 초음파 검사 혹은 복부 컴퓨터 단층 촬영검사를 포함한 신장학적인 검사는 다년간 지속적으로 추적 관찰해야 한다.

• Childhood Kidney Diseases
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• 제20권2호
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• pp.37-44
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• 2016

Although asymptomatic bacteriuria, cystitis, and acute pyelonephritis (APN) have been categorized as urinary tract infections (UTIs), the immunopathogenesis of each disease is different. APN shows an age predilection; the majority of children (over 70-80%) with APN are under 1-2 years of age, with a male predominance. After 1-2 years of age, female predominance has been reported. This finding suggests that the immature immune state of infancy may be associated with the pathogenesis of APN. Escherichia coli is the most common etiologic agent; other uropathogens associated with UTIs originate from the host and comprise normal flora that are continuously altered by environmental factors. Therefore, uropathogens may have characteristics different from those of extraneous bacterial pathogens. Although antibiotic-resistant uropathogens, including extended-spectrum beta-lactamase-producing strains, are increasing in Korea and worldwide, treatment failure is rare in immune-competent children. The immunopathogenesis of APN remains unknown. Intact bacteria may not be the causative substances in renal cell injury; rather, smaller substances produced during bacterial replication may be responsible for renal cell injury and scarring. Moreover, substances from host cells such as proinflammatory cytokines may be involved in renal cell injury. A dimercaptosuccinic acid scan is used to detect the site of bacterial replication in the renal parenchyma, and may be influenced by the size of the focus and the stage of APN. Traditional aggressive studies used to identify vesicoureteral reflux after the first episode of APN have been modified because of rare cases of chronic kidney disease in patients with recurrent UTI.

• Childhood Kidney Diseases
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• 제26권1호
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• pp.31-39
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• 2022

Alport syndrome (AS) is a progressive hereditary nephritis that is often accompanied by sensorineural hearing loss and ocular abnormalities. It is inherited in three modes of X-linked AS (XLAS), autosomal recessive AS (ARAS), and autosomal dominant AS (ADAS). XLAS is caused by pathogenic variants in COL4A5, while ARAS and ADAS are caused by those in COL4A3 or COL4A4. There is currently no curative treatment for AS; however, angiotensin-converting enzyme inhibitors (ACEi) can improve the outcome of AS. In the past decade, multiple studies have shown that early intervention with ACEi upon isolated microscopic hematuria or microalbuminuria could delay disease progression, and early diagnosis is crucial for early treatment. Therefore, a new classification of AS based on molecular diagnoses has been proposed, including the paradigm shift of re-classifying female "carriers" to "patients" and "thin basement membrane nephropathy" to "ADAS." In addition, with the detection of COL4A mutations in some patients with biopsy-confirmed IgA nephropathy, focal segmental glomerulosclerosis, and chronic kidney disease of unknown origin, it is suggested that the phenotype of AS should be expanded. In this review, we highlight the landmark studies and guidelines published over the past decade and introduce strategies for early diagnosis and treatment to improve the outcomes of AS.

• Childhood Kidney Diseases
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• 제10권2호
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• pp.162-173
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• 2006

Purpose : To report the decreasing indicence of HBV(Hepatitis B virus)-associated membranous nephropathy in children after HBV vaccination and to elucidate the clinical course and treatment strategies of IMN(Idiopathic membranous nephropathy). Methods : We retrospectively reviewed the clinico-pathological findings of HBV-MN and IMN patients who underwent a renal biopsy from 1986 to 2005. We compared the HBV-MN and the IMN groups and the remission and the non-remission groups of patients with IMN. Results : Among 24 cases of MN patients, HBV-MN comprised 6 cases(25%) and IMN 18 cases(75%). Clinical masnifestations were nephrotic syndrome(3 cases, 50%), nephritic syndrome(1 case, 16.7%), asymptomatic(2 cases, 33.4%) in the HBV-MN group, asymptomatic(10 cases, 55.5%), nephrotic syndrome(5 cases, 27.8%), and gross hematuria(3 cases, 16.7%) in the IMN groups. From 1996 to 2000, there were 2 cases(28%) of HBV-MN and 5 cases(72%) of IMN. After 2001 all 10 cases were IMN. In the HBV-MN group, 4 cases(66.7%) received interferon and 1 cases received methylprednisolone pulse therapy. In the IMN group, 16 cases(88.9%) received methylprednisolone, 8 cases(44.4%) were in complete remission, 2 cases(11.1%) were in partial remission, 2 cases(11.1%) were in chronic renal failure, and 5 cases(27.8%) were lost to follow-up with sustained proteinuria, 1 case(5.6%) continued to have frequent relapse of nephrotic syndrome without renal insufficiency. In the comparison between remission and non-remission groups, nephrotic range proteinuria and hypertension were more significantly common in the non-remission group(P<0.05). Conclusion : With HBV vaccination, HBV-MN has decreased markedly. IMN is a rare glomerular disease in children. Because the prognosis for patients with nephrotic range proteinuria is poor this group needs more aggressive treatment.

• Childhood Kidney Diseases
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• 제11권1호
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• pp.126-131
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• 2007

측복부 통증은 신, 상부 요로계 질환의 대표적인 척도로 여겨지나 드물게 골반울혈증후군도 감별해야 한다. 골반울혈증후군은 가임기 경산부 여성에서 호발하나 소아청소년기에 원인이 불명확한 측복부 통증을 호소할 때 고려해야 할 질환이다. 저자들은 청소년기 여아에서 만성적인 좌측측복부 통증으로 진단된 골반울혈증후군 1례를 경험하였기에 보고하는 바이다.

• Childhood Kidney Diseases
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• 제11권1호
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• pp.112-117
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• 2007

저자들은 Leber의 선청성 흑암시를 진단받은 남매에서 성장 부전, 다음, 다뇨 및 야뇨증의 병력 없이 소아기에 만성 신부전으로 진행된 사춘기 콩팥 황폐증을 경험하여 우리나라에서는 드문 $Senior-L\ddot{o}ken$ 증후군을 보고하는 바이다.

• Childhood Kidney Diseases
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• 제13권2호
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• pp.271-277
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• 2009

저자들은 스테로이드 의존형 신증후군 환자에서 진단 8년 만에 두경부 종물이 발생, 혈액 검사상 IgE 증가와 호산구 증가, 경부 컴퓨터 단층 촬영으로 기무라병을 진단하였고, 스테로이드로 치료하였으며, cyclosporine을 투여한 이후 장기간 두경부 종물과 신증후군의 재발을 억제할 수 있었기에 문헌고찰과 함께 보고하는 바이다.