Displaying publications 1 - 20 of 60 in total

  1. Ong SG
    Malays Fam Physician, 2013;8(3):31-3.
    PMID: 25893055 MyJurnal
    Tendon rupture is a rare complication that occurs in patients receiving corticosteroid therapy. We report a case of a middle-aged man with mixed connective tissue disease who presented with spontaneous biceps tendon rupture 5 weeks after initiation of high-dose corticosteroid therapy. Musculoskeletal ultrasonography was performed at the clinic and helped to confirm the diagnosis. It is a new imaging modality that is increasingly used in rheumatology clinics in Malaysia as it serves as an extension to physical examination. Musculoskeletal ultrasonography is preferred by patients as it is noninvasive, does not involve ionising radiation, painless, relatively inexpensive and can be performed readily at the clinic.
    KEYWORDS: corticosteroid; musculoskeletal ultrasonography; tendon rupture
  2. Pagalavan L, Ong SG
    Med. J. Malaysia, 2007 Jun;62(2):117-21.
    PMID: 18705442 MyJurnal
    A six year retrospective study of the demography, clinical and laboratory features of patients with systemic sclerosis (SSc) was carried out in Selayang Hospital. There were 61 cases seen between January 2000 and December 2005. Of these, 55 (90.2%) were females and 6 (9.8%) were males. Twenty-eight (45.9%) were Malays, 24 (39.3%) were Chinese and 9 (14.8%) were Indians. The mean age of onset was 38.8 years. Thirty-nine (64.0%) had limited cutaneous SSc, 21 (34.4%) had diffuse cutaneous SSc and one had localized morphoea. Raynaud's phenomenon was present in 82.6%, telangiectasia in 45.9%, calcinosis in 11.5%, sclerodactyly in 83.6%, digital pitting scars in 42.6%, digital infarcts/ulcers/gangrene in 23.0%, arthralgia/arthritis in 49.2% and gastroesophageal reflux disease (GERD) in 47.5%. Forty-three (70.5%) patients had interstitial lung disease. Seven patients had associated myositis, 7 systemic lupus erythematosus and 2 rheumatoid arthritis. Three had two other connective tissue diseases. Antinuclear antibodies were positive in 83.6% and anti-Scl 70 antibodies in 34.4%. This study demonstrates that limited cutaneous SSc is more common and there is a high incidence of interstitial lung disease in our population.
    Study site: Selayang Hospital, Kuala Lumpur, Malaysia
  3. Ong SG, Rajasingam R
    Med. J. Malaysia, 2007 Mar;62(1):68-9.
    PMID: 17682576
    A middle aged lady presented with clinical manifestations of primary amyloidosis which included amyloid cardiomyopathy. There was failure to confirm the diagnosis of amyloidosis with biopsies from rectal and tongue tissues. Fat tissue obtained from abdominal subcutaneous fat aspiration eventually demonstrated the presence of amyloid.
  4. Adityanjee, Singh S, Singh G, Ong S
    Br J Psychiatry, 1988 Jul;153:107-11.
    PMID: 3224231
    Although neuroleptic malignant syndrome (NMS) was initially thought to be a rare, idiosyncratic complication, the incidence estimates have been rising over the years. A part of this increase can be explained on the basis of an over-inclusive definition of NMS. The unitary concept of NMS has been challenged recently and a spectrum concept has been enunciated on the basis of findings of retrospective chart-reviews which have used too broad a definition of NMS. The authors describe three cases of neuroleptic-related toxicity with different clinical presentations which appeared in a manner apparently supporting the spectrum concept. They discuss this controversial concept critically, however, and caution against its overzealous use in routine clinical practice owing to its far-reaching clinical implications.
  5. Ong S, Ng WH
    Med. J. Malaysia, 1979 Sep;34(1):86-8.
    PMID: 542159
  6. Ong ST, Siar CH
    Aust Dent J, 1997 Dec;42(6):404-8.
    PMID: 9470284
    Florid cemento-osseous dysplasia refers to a group of fibro-osseous lesions which are exuberant, multiquadrant and arise from the tooth-bearing area of the jaws. It is classically described as a condition occurring almost exclusively in middle-aged black women. A case of florid cemento-osseous dysplasia occurring in a young Chinese male is reported which was rare in regard to race and sex. This 20 year old Chinese man presented with huge symmetrical bony lesions in all four quadrants of the jaws. Clinical presentation, radiological findings and histological features of the excised specimens are described. Treatment of the lesions was unusual. Curettage was first done with minimal benefit and it was followed by mandibular recontouring to improve facial appearance. The outcome of these procedures will be discussed.
  7. Ong ST, Ngeow WC
    Dent Update, 1999 May;26(4):163-5.
    PMID: 10765768
    Sinus on the chin can be the result of a chronic apical abscess due to pulp necrosis of a mandibular anterior tooth. The tooth is usually asymptomatic, and a dental cause is therefore not apparent to the patient or the unsuspecting clinician. Not infrequently, the patient may seek treatment from a dermatologist or general surgeon instead of a dentist. Excision and repair of the fistula may be carried out with subsequent breakdown because the dental pathology is not removed. This paper reports the presence of median mental sinus of dental origin in twins. One case healed following root canal therapy while the other required both root canal therapy and surgery to eliminate the infection.
  8. Goh KG, Ong SG
    Lupus, 2015 Jan;24(1):90-3.
    PMID: 25305213 DOI: 10.1177/0961203314554248
    Patients with autoimmune connective tissue disease may manifest as overlap syndrome with features of systemic lupus erythematosus (SLE), systemic sclerosis, rheumatoid arthritis and myositis. Those presenting with active SLE can present with immune thrombocytopenia (IT) and may be complicated with subdural hematoma which, though rare, is potentially life-threatening. We report here a patient with overlap syndrome who had recurrent spontaneous subdural hematoma due to severe thrombocytopenia which did not respond to corticosteroids and azathioprine. Her platelet count became normal with three doses of low-dose intravenous cyclophosphamide (IV CYC) given at 3-weekly intervals. She remained in remission with maintenance therapy with azathioprine.
  9. Ong ST, Lian CB
    J Clin Pediatr Dent, 1992;17(1):33-5.
    PMID: 1290758
    A case of chronic disseminated histiocytosis X (Hand-Schuller-Christian Disease) of the mandible is presented. Multi-modal approach to management is discussed.
  10. Liam CK, Ong SB
    Singapore Med J, 1990 Apr;31(2):182-4.
    PMID: 1973548
    The neuroleptic malignant syndrome is an idiosyncratic reaction to neuroleptic therapy which sometimes can be fatal because of the various associated complications. We describe a schizophrenic patient who, after commencement of haloperidol, developed this reaction which was complicated by acute oliguric renal failure and aspiration pneumonia. It is mandatory that the patient is treated in a medical intensive care unit once the syndrome is recognised. The management of the neuroleptic malignant syndrome and its complications is discussed.
  11. Quek DK, Ong SB
    Singapore Med J, 1990 Apr;31(2):185-8.
    PMID: 2371586
    A 26-year old woman with congenital complete heart block and prolonged QT interval presented for the first time with syncopal attacks associated with torsade de pointes in adulthood. Cardioversion followed by overdrive pacing was needed to finally control the unstable rhythm. During episodes of non-capture, paraoxysms of torsade de pointes leading to ventricular flutter were recorded by a 24-hour ambulatory electrocardiographic monitoring. Beta-blockade and permanent ventricular pacing finally abolished both the syncopal attacks and the torsade phenomena. The prognosis of congenital complete heart block associated with QT prolongation resembles that of the Romano-Ward syndrome. Recognition of this variant would facilitate earlier treatment of this rare but potentially lethal disorder.
  12. Ong SB, Leng YK
    Aust N Z J Psychiatry, 1979 Sep;13(3):255-9.
    PMID: 293181
    The case history, treatment and follow-up of a thirteen-year-old girl with obsessive-compulsive neurosis of six months duration are reported. Results show that behaviour modification techniques were effective though a second course of treatment was required. Her illness and its treatment by behaviour therapy in relation to the Malaysian Chinese culture is discussed.
  13. Chin CS, Ong SC
    Med. J. Malaysia, 1979 Jun;33(4):326-30.
    PMID: 522744
  14. Yeoh KL, Ong SB
    Aust N Z J Psychiatry, 1982 Jun;16(2):61-6.
    PMID: 6957184
    A pragmatic and rational approach to the management of five child psychiatric cases in Malaysia is briefly reviewed. The significance of sociocultural factors in treating these cases within the context of a rapidly developing plural society is emphasized. The implications of overemphasis on educational and material achievements are noted.
  15. Gan SP, Ong SG
    Med. J. Malaysia, 2017 04;72(2):124-125.
    PMID: 28473677 MyJurnal
    A pregnant woman with antiphospholipid syndrome presented with repeated venous thromboembolism (VTE) in the first and second trimesters of pregnancy despite receiving combination therapy with low-molecular-weight heparin and aspirin. The addition of hydroxychloroquine prevented further VTE recurrence, thus demonstrating its potential antithrombotic effects.
  16. Ong SB, Lee CT
    Acta Psychiatr Scand, 1981 Mar;63(3):198-207.
    PMID: 7015790
    A double-blind study was carried out to compare the efficacy and tolerability of nomifensine and amitriptyline in 17 Malaysian patients with moderate to severe depression. The two drugs did not differ with regard to antidepressant effect but nomifensine-treated subjects report fewer side-effects with no complaints of palpitations. Nomifensine also increases capacity for work and activity.
  17. Lai Y, Nik Yahya NH, Ong SG
    Med. J. Malaysia, 2014 Apr;69(2):98-100.
    PMID: 25241822
    Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAV) are a group of uncommon diseases. Given its rarity and multisystem clinical presentation which are usually serious and potentially fatal, prompt recognition and early treatment are of utmost importance. We report a case of AAV that presented with digital infarcts, cutaneous vasculitis, rapidly progressive glomerulonephritis, mononeuritis multiplex, eosinophilia and positive myeloperoxidase (MPO)-ANCA antibody. Apart from renal damage, there was complete recovery in other systems following intravenous cyclophosphamide and high-dose glucocorticoids albeit the response was delayed. This response obviates the need for second-line therapy with newer agent such as rituximab (anti-CD20 monoclonal antibody). We would also like to highlight that this is the first case of AAV that is associated with autoimmune thyroid disease to be reported from Malaysia.
  18. Mukundan R, Ong SH, Lee PA
    IEEE Trans Image Process, 2001;10(9):1357-64.
    PMID: 18255550 DOI: 10.1109/83.941859
    This paper introduces a new set of orthogonal moment functions based on the discrete Tchebichef polynomials. The Tchebichef moments can be effectively used as pattern features in the analysis of two-dimensional images. The implementation of the moments proposed in this paper does not involve any numerical approximation, since the basis set is orthogonal in the discrete domain of the image coordinate space. This property makes Tchebichef moments superior to the conventional orthogonal moments such as Legendre moments and Zernike moments, in terms of preserving the analytical properties needed to ensure information redundancy in a moment set. The paper also details the various computational aspects of Tchebichef moments and demonstrates their feature representation capability using the method of image reconstruction.
  19. Tan TC, Ong SC, Suresh KG
    Parasitol. Res., 2009 Oct;105(5):1283-6.
    PMID: 19603182 DOI: 10.1007/s00436-009-1551-5
    This represents the first study to determine the genetic diversity of Blastocystis sp. among cancer and HIV/AIDS patients. Forty Blastocystis sp. isolates obtained from 20 cancer and 20 HIV/AIDS patients were genotyped by PCR using seven pairs of known sequenced-tagged site primers. Out of the 40 isolates, 38 were identified as one of the known genotypes and two isolates were negative with all the STS primers. Blastocystis sp. subtype 3 which is reported to be associated with disease was found to be predominant among the study subjects.
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