Retroperitoneal fibrosis – an unsolved mystery

Premachandra, ND; Perera, ND

doi:10.4038/slju.v11i1.4053

Cited by 3 publications

(6 citation statements)

References 30 publications

(32 reference statements)

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“…USS has a minor role in diagnosis, whereas CECT (Contrast enhanced CT) with MRI (Magnetic Resonance Imaging) plays a major role 1 . MRI is more advantageous compared to CECT, because of the low radiation exposure and more detailed anatomy of entrapped structures 1,5 . But both the imaging modalities are not very sensitive regarding differentiation of IRF from a malignant lesion.…”

Section: Discussionmentioning

confidence: 99%

“…But both the imaging modalities are not very sensitive regarding differentiation of IRF from a malignant lesion. Most authorities recommend confirmation of the diagnosis histologically, before commencement of treatment 5 . Open biopsy is preferred for obtaining histology from all the modalities 5 .…”

Section: Discussionmentioning

confidence: 99%

“…Most authorities recommend confirmation of the diagnosis histologically, before commencement of treatment 5 . Open biopsy is preferred for obtaining histology from all the modalities 5 . Only CECT was performed in this patient due to limited availability of MRI, and this demonstrated a soft tissue density mass covering the aorta, inferior vena cava and both ureters, with associated bilateral obstructive uropathy.…”

Section: Discussionmentioning

confidence: 99%

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Idiopathic retroperitoneal fibrosis in a young female; the first case report in Sri Lanka

Gamage¹,

Chandana²,

Weerasinghe³

et al. 2018

SL J. Med.

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Idiopathic retroperitoneal fibrosis (IRF) is a rare disease with a better prognosis if identified earlier and treated promptly. This is thought to be secondary to an autoimmune process resulting in fibrosis, causing obstructive uropathy. Radiological aspects play a major role in diagnosis and follow up. We present a young female patient who was diagnosed with idiopathic retroperitoneal fibrosis and treated successfully. This case highlights the fact that diagnosing IRF is a result of a cascade of reasonable investigations and early diagnosis prevents irreversible renal damage. Classic radiological features with histology provide a guide to the proper diagnosis, and treatment with corticosteroids gives a marked response.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Idiopathic retroperitoneal fibrosis in a young female; the first case report in Sri Lanka

Gamage¹,

Chandana²,

Weerasinghe³

et al. 2018

SL J. Med.

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“…According to the Clarke et al [4] these wind speeds are derived based on information such as damage survey done along the cyclone path, available historical data, considering distance from the coast line and particular location, and using Australian practices. Therefore, some researchers ( [6], [7]) raised doubts about magnitude of these wind speeds not only due to the lack of theoretical basis on derivation but also low wind speeds compared to other countries with similar geographical and meteorological conditions. Not only the basic wind speeds but also wind zoning is needed to be revised because some parts of the island may not be free from cyclones anymore as assumed by the design manual.…”

Section: Previous Practice In Sri Lankamentioning

confidence: 99%

Wind Loads on a Medium-Rise Building by Using Five Major International Wind Codes and Standards

Weerasuriya

Jayasinghe

2014

Engineer

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Abstract:Wind load calculations are done for a medium-rise building with 48 m height locates in an urban area of Sri Lanka. Five different international wind loading standards were selected to calculate wind loads according to prevailing conditions in Sri Lanka. Available 3 second gust wind speed is converted in to mean hourly wind speed and 10 minutes average wind speed to use selected wind loading standards. The difference of wind load calculations is evaluated by using member forces in columns, beams, and shear walls obtained from a 3-D finite element modelling. The comparison displays that both the Australian standards yields higher wind loads compared to other selected standards. The use of higher terrain-height multiplier for cyclone prone zone 1 contributes much larger member forces compared to other cases. None of the standards exceeds the serviceability criteria, which evaluate by means of drift index.

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“…Post disaster wind speeds in all three zones as shown in Table 1 were used for wind calculation. The use of higher post-disaster wind speeds compared to low wind speeds for normal structures is recommended based on views of previous researchers ( [17], [18]) considering; uncertainty of derivation of basic wind speeds, lower wind speeds compared to other countries with similar topographical and wind conditions, and as a conservative approach to achieve higher margin of safety, etc. Wind loads are calculated by using dynamic methods as given in standards to encounter anticipated dynamic response of the high-rise buildings.…”

Section: Wind Induced Forcesmentioning

confidence: 99%

Wind Loads on High-Rise Buildings by Using Five Major International Wind Codes and Standards

Weerasuriya

Jayasinghe

2014

Engineer

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Abstract:A high-rise building of height -183 m was employed to evaluate similarities and differences of wind load calculations done by using five major wind codes and standards. Evaluation was done in both ultimate and serviceability limit conditions. Member forces in columns, and beams, compressive stress in shear walls and support reactions obtained from finite element modelling was used to assess building responses in ultimate limit condition. Along and across wind, accelerations and drift indices were engaged to estimate serviceability limit state performances. Available 3 second gust wind speeds are converted into mean hourly and 10 minute average wind speeds to calculate wind loads on building. Wind speeds with 5 years return period was used in building acceleration calculation. The simultaneous use of higher terrain-height multiplier and importance factor may be lead to over design, even in cyclone prone areas. The use of post disaster wind speed does not exceed the drift limit but exceeds threshold acceleration value in across insert wind acceleration.

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Retroperitoneal fibrosis – an unsolved mystery

Abstract: DOI: http://dx.doi.org/10.4038/slju.v11i1.4053SLJU 2010; 11(1): 7-13

Cited by 3 publications

References 30 publications

Idiopathic retroperitoneal fibrosis in a young female; the first case report in Sri Lanka

Idiopathic retroperitoneal fibrosis in a young female; the first case report in Sri Lanka

Wind Loads on a Medium-Rise Building by Using Five Major International Wind Codes and Standards

Wind Loads on High-Rise Buildings by Using Five Major International Wind Codes and Standards

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