Publications by authors named "Ratnatunga N"

Background: Chronic kidney disease (CKD) is a significant clinical challenge in Sri Lanka. The present study presents histopathological diagnoses from native renal biopsies in Kandy District, 2011-2020.

Methods: Reports of 5,014 renal biopsies principally performed at Kandy Teaching Hospital over 2011-2020 were reviewed.

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Introduction: Although the investigation of chronic kidney disease of uncertain etiology (CKDu) has identified many possible influencing factors in recent years, the exact pathomechanism of this disease remains unclear.

Methods: In this study, we collected 13 renal biopsies from patients with symptomatic CKDu (Sym-CKDu) from Sri Lanka with well-documented clinical and socioeconomic factors. We performed light microscopy and electron microscopic evaluation for ultrastructural analysis, which was compared with 100 biopsies from German patients with 20 different kidney diseases.

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Background: Patients presenting with acute interstitial nephritis (AIN) of unknown aetiology, probably the earliest presentation of chronic kidney disease of unknown aetiology (CKDu), have been treated with oral prednisolone and doxycycline by physicians in Sri Lanka. This trial assessed the effectiveness of prednisolone and doxycycline based on eGFR changes at 6 months in patients with AIN of unknown aetiology.

Method: A randomized clinical trial with a 2 × 2 factorial design for patients presenting with AIN of unknown aetiology (n = 59) was enacted to compare treatments with; A-prednisolone, B-doxycycline, C-both treatments together, and D-neither.

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Ingestion of toxic trace elements in the human body has been considered one of the major reasons for renal dysfunction. Chronic kidney disease with uncertain etiological factors (CKDu) is a recently described clinical entity in which the disease is found in geographically isolated pockets in the dry zone of Sri Lanka. In CKDu regions, an increasing number of cases are reported with acute interstitial nephritis without any known reason (AINu).

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The effectiveness of different combined oral contraceptive pills and metformin in reducing hirsutism in patients with polycystic ovary syndrome (PCOS) remains unclear. We sought to determine the effects of ethinylestradiol (35μg)/cyproterone acetate (2mg) (EE/CPA) and ethinylestradiol (20μg)/desogestrel (0.15mg) (EE/DES), alone or with metformin, on hirsutism in PCOS.

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Introduction: Visceral adiposity index (VAI) is a mathematical index derived from the body mass index (BMI), waist circumference (WC), serum fasting triglyceride (TG) and high-density lipoprotein cholesterol (HDL-C). It reflects visceral adipocyte dysfunction (VAD) and is associated with cardiometabolic risk. Women with polycystic ovarian syndrome (PCOS) have adipocyte dysfunction, which is associated with metabolic disorders.

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Background: Melioidosis is considered endemic in certain areas of the world. Musculoskeletal and soft tissue involvement are relatively uncommon presentations in melioidosis. We present a case of infective myositis in a patient with melioidosis in Sri Lanka, which is not considered an endemic country.

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Background: The emergence of leptospirosis-associated severe pulmonary hemorrhagic syndrome (SPHS) with high case fatality has been reported from many countries. Understanding of clinical disease and sequel of SPHS needs larger studies with adequate numbers. The purpose of this study was to describe the characteristics and sequel by different therapeutic approaches for SPHS in Leptospirosis in Sri Lanka.

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Objective: This study was aimed at determining the diagnostic accuracy of the ultrasound characteristics in the identification of malignant thyroid nodules in patients attending the surgical clinic at a tertiary care hospital in Sri Lanka.

Results: This prospective validation study was conducted among 263 patients attending the surgical clinic at a tertiary care hospital, Sri Lanka. The ultrasound characteristics having statistically significant associations with thyroid malignancies were identified by employing a multivariable analysis.

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Background And Objectives: A kidney disease of unknown cause is common in Sri Lanka's lowland (dry) region. Detailed clinical characterizations of patients with biopsy-proven disease are limited, and there is no current consensus on criteria for a noninvasive diagnosis.

Design, Setting, Participants, & Measurements: We designed a prospective study in a major Sri Lankan hospital servicing endemic areas to ascertain pathologic and clinical characteristics of and assess risk factors for primary tubulointerstitial kidney disease.

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Background: The use of dipstick proteinuria to screen Chronic Kidney Disease of uncertain aetiology (CKDu) in Sri Lanka is a recently debated matter of dispute. The aim of this study was to assess the suitability of biomarkers: serum creatinine, cystatin C and urine albumin to creatinine ratio (ACR) for screening CKDu in Sri Lanka.

Methods: Forty-four male CKDu patients and 49 healthy males from a CKDu-endemic region were selected.

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Background: Castleman disease is a rare lymphoproliferative disorder presenting with localized or disseminated lymphadenopathy and systemic manifestations. It can be categorized in numerous ways, such as unicentric versus multicentric, histopathological variants (hyaline-vascular, plasma cell, and mixed), or subtypes based on causative viral infections (human immunodeficiency virus, human herpesvirus-8, or Kaposi sarcoma herpesvirus). Presentation ranges from asymptomatic to symptoms involving multiple organs.

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Background: Despite the improvement in survival of patients with lupus nephritis (LN) globally, there is sparse data from Sri Lanka (SL). The current study aims to describe the clinicopathological findings, treatment response and predictors of long-term outcome of patients with WHO class III-IV LN in SL, managed according to the Euro-lupus regime.

Results: Of 72 patients, 64 were females.

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Renal involvement is the most important cause of morbidity and mortality in systemic amyloidosis. This retrospective analysis was conducted to analyse the clinico-pathological characteristics of renal amyloidosis in a group of Sri Lankan patients undergoing renal biopsy. Renal amyloidosis was observed in 50/ 9712 (0.

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Objectives: To describe the pattern of clinical euthyroidgoitre in a tertiary care unit in Sri Lanka before and after iodination of salt in Sri Lanka.

Methods: We reviewed our thirty-one year computerised database of patients with goitres, spanning iodination in 1995.

Results: Prevalence of euthyroid clinical simple diffuse goitre did not reduce during the first thirteen years (p=0.

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Introduction: The majority of published data on chronic kidney disease of uncertain etiology (CKDu) is on asymptomatic patients who were detected in screening programs. The clinicopathological profile of a group of patients presenting with acute symptoms and renal dysfunction from CKDu endemic regions in Sri Lanka was studied.

Methods: 59 patients > 10 years of age with backache, feverish fatigue feeling, dysuria, joint pain, or dyspepsia, singly or in combination with elevated serum creatinine (> 116 and > 98 µmol/L for male and females, respectively) were included in the study.

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Background: Star fruit (Averrhoa carambola) is commonly consumed as a herbal remedy for various ailments in tropical countries. However, the dangers associated with consumption of star fruit are not commonly known. Although star fruit induced oxalate nephrotoxicity in those with existing renal impairment is well documented, reports on its effect on those with normal renal function are infrequent.

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Chronic kidney disease of unknown etiology (CKDU) is endemic among the rural farming communities in several localities in and around the North Central region of Sri Lanka. This is an interstitial type renal disease and typically has an insidious onset and slow progression. This study was conducted to identify the pathological features in the different clinical stages of CKDU.

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Article Synopsis
  • - The study aims to explore the genetic factors contributing to chronic kidney disease of uncertain etiology (CKDu) in Sri Lanka, where familial clustering indicates possible hereditary links.
  • - Researchers performed whole-exome sequencing on samples from CKDu patients and controls, leading to the identification of key genetic variants, notably in the KCNA10 gene and several novel variants in the LAMB2 gene.
  • - The findings support the idea that genetic susceptibility plays a significant role in CKDu, suggesting that a range of rare genetic variants may be involved in this condition within the affected population.
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Introduction: Kidney involvement in non-Hodgkin lymphoma is recognized but mostly diagnosed following a diagnosis of lymphoma. We describe a rare case of mantle cell lymphoma, a B-cell-type non-Hodgkin lymphoma, first presenting with immune complex glomerulonephritis.

Case Presentation: We report the case of a 58-year-old Sri Lankan man who presented with gross hematuria.

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Objectives: To investigate the pattern of World Health Organization (WHO) lymphoma sub types in a sample from Sri Lanka.

Methods: Retrospective, descriptive study was carried out using biopsy specimens of patients diagnosed or suspected to have a lymphoma received by the Department of Pathology, University of Peradeniya for WHO sub typing. A sample of 227 cases diagnosed to have a lymphoma.

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