Displaying publications 41 - 60 of 1046 in total

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  1. Johari HH, Mohamad I, Sachlin IS, Aziz ME, Mey TY, Ramli RR
    Auris Nasus Larynx, 2018 Dec;45(6):1183-1190.
    PMID: 29880289 DOI: 10.1016/j.anl.2018.04.010
    OBJECTIVE: This study was done to determine frontal recess anatomy cell variations and its association with frontal sinusitis. The incidence of frontal recess cells in the population, the presence of frontal recess cell variations in chronic rhinosinusitis and non-chronic rhinosinusitis and the association of frontal recess cell variation in the development of frontal sinusitis were also assessed.

    METHODS: This was an observational, retrospective cross-sectional study of computed tomography (CT) scan of paranasal sinus that had been performed on patients in Hospital Universiti Sains Malaysia and Hospital Sultanah Bahiyah done from January 2009 until December 2016. The presence of frontal recess cells variation was compared with other populations.

    RESULTS: A total of 312 sides from 156 patients' CT scan images were analyzed. Left and right sinuses were considered individually. A total of 63 sides showed evidence of frontal sinusitis, 37 were male and 26 were female, whereas 249 sides were clear from frontal sinus disease. It was not much difference in mean age for frontal sinusitis patient (46.51±14.00) and patients without frontal sinusitis (48.73±16.44). The percentage was almost equal for CRS and non-CRS groups regardless of side and gender. In our study, the frontal recess cell such as agger nasi cell was found in almost all patients 98.1%, frontal ethmoidal cell type 1, type 2, type 3 and type 4 comprised of 28.8%, 31.1%, 14.4% and 0% respectively. Whereas, suprabullar cell can be seen in 40.3%, supraorbital ethmoid cells 16.7%, frontal bullar cell 33.0% and inter-frontal sinus septal cells 10.8%. There was a statistically significant association between the presence of frontal bullar cell and the development of frontal sinusitis (p value<0.001).

    CONCLUSION: The frontal recess cells variation in Malaysian subjects were almost similar to those reported in other Asian populations such as Japanese, Taiwanese, Chinese and Korean. Our study found that frontal bullar cells had a significant association with the development of frontal sinusitis than other frontal recess cells. The understanding of the frontal recess anatomical structures was very important as this would lead to a successful treatment of CRS and at the same time it helped the surgeon to have a better plan of endoscopic sinus surgery to prevent the disease recurrence and surgical complication.

    Matched MeSH terms: Tomography, X-Ray Computed
  2. Lim JA
    Am J Obstet Gynecol, 2018 11;219(5):502.
    PMID: 29678504 DOI: 10.1016/j.ajog.2018.04.021
    Matched MeSH terms: Tomography, X-Ray Computed
  3. Azlina Ibrahim, Alvin Oliver Payus
    MyJurnal
    Hepatic involvement in extra-pulmonary tuberculosis (TB) is rare, even in the endemic area. It has a high mortality rate as it can easily be misdiagnosed due to its rarity and non-specific presentations, and the treatment can be challenging for its hepatotoxic side-effect. A 55-year old man who was newly diagnosed with AIDS and pulmonary TB which complicated with anti-TB-induced transaminitis, presented with a few weeks history of fever and persistent diarrhoea. It was initially treated as microsporidia infection but the symptoms persisted despite given antiparasitic agent for more than a week. He was subjected to computed tomography (CT) scan of the abdomen and noted multiple hypoechoic lesion at multiple segments of the liver, which later confirmed to be liver TB by liver biopsy. As he could not tolerate Akurit-4 (Rifampicin 150 mg, Isoniazid 75 mg, Pyrazinamide 400 mg and Ethambutol 275 mg), the second-line treatment was given instead. He is currently well on regular clinic appointment. The objective of this case report is to share the rare occurrence of hepatic TB and the difficulty to treat it as the hepatotoxic effect of anti-TB medications complicate the liver damage due to the infection.
    Matched MeSH terms: Tomography, X-Ray Computed
  4. Wahab AA, Norliyana N, Ding CH, Nurzam SCH, Salbiah N, Rao KR
    Trop Biomed, 2020 Sep 01;37(3):560-565.
    PMID: 33612771 DOI: 10.47665/tb.37.3.560
    Primary prostatic melioidosis is a rare presentation of melioidosis even in melioidosis endemic areas. We report a case of a 58-year-old man with underlying diabetes mellitus who presented with a 5-day history of high-grade fever associated with lower urinary tract symptoms. Suprapubic tenderness and tender prostatomegaly were noted on examination. An abdominal computed tomography (CT) scan confirmed the presence of a prostatic abscess. Both blood and prostatic pus cultures grew Burkholderia pseudomallei. He was initially started on intravenous ceftazidime, followed by an escalation to intravenous meropenem. He was discharged home with oral amoxicillin-clavulanate and doxycycline after completing 12 days of meropenem. Unfortunately, his compliance to oral antibiotic therapy was poor, and he succumbed to the disease.
    Matched MeSH terms: Tomography, X-Ray Computed
  5. Sabir BI, Rahmat K, Bux SI, Rajagopal NS, Looi LM, Sia SF
    Clin Neurol Neurosurg, 2013 Oct;115(10):2192-6.
    PMID: 23791432 DOI: 10.1016/j.clineuro.2013.05.023
    Matched MeSH terms: Tomography, X-Ray Computed
  6. Heng SSL, Yahya MM, Sulaiman WAW, Saad AZM
    Int J Surg Case Rep, 2021 Mar;80:105202.
    PMID: 33500231 DOI: 10.1016/j.ijscr.2020.10.096
    INTRODUCTION: Juvenile giant fibroadenoma is a rare type of fibroadenoma characterized by rapid growth of a breast tumor in an adolescent. Benign in nature, they rarely present as fungating and ulcerating tumors. Benign tumors masquerading as malignancies are surgical conundrums. No co nsensus exists yet on the management of these cases. We aim to discuss the dilemma in managing a bleeding, fungating giant fibroadenoma in an adolescent female and highlight risks of alternative therapies.

    PRESENTATION OF CASE: A 19-year-old lady presented with a bleeding, fungating breast mass worsened with topical herbal concoction. Examination revealed a 10 × 15 cm fungating breast mass that obliterated her nipple- areolar complex (NAC). Computed Tomography (CT) scan reported a huge heterogeneously enhancing mass 10.6 × 14.5 × 15.1 cm with loss of normal fat plane with the overlying skin but a clear fat plane with the pectoralis muscle posteriorly.

    DISCUSSION: Giant breast masses that fungate and ulcerate usually indicate a sinister pathology. Traditional remedies have been reported to exacerbate growth. In cases where most of the breast parenchyma and NAC has been destroyed, it is no longer possible to proceed with breast conserving techniques. Breast reconstruction is crucial in adolescents and should be tailored to the patient's existing breast size as well as body habitus.

    CONCLUSION: In juvenile giant fibroadenomas where breast parenchyma and NAC has been destroyed, breast reconstruction is the goal. The lack of consensus in both diagnosis and management further compounds the difficulty in dealing with this sensitive population. Awareness needs to be raised regarding negative effects related to traditional medicine.

    Matched MeSH terms: Tomography, X-Ray Computed
  7. Chen Z, Rajamanickam L, Cao J, Zhao A, Hu X
    PLoS One, 2021;16(12):e0260758.
    PMID: 34879097 DOI: 10.1371/journal.pone.0260758
    This study aims to solve the overfitting problem caused by insufficient labeled images in the automatic image annotation field. We propose a transfer learning model called CNN-2L that incorporates the label localization strategy described in this study. The model consists of an InceptionV3 network pretrained on the ImageNet dataset and a label localization algorithm. First, the pretrained InceptionV3 network extracts features from the target dataset that are used to train a specific classifier and fine-tune the entire network to obtain an optimal model. Then, the obtained model is used to derive the probabilities of the predicted labels. For this purpose, we introduce a squeeze and excitation (SE) module into the network architecture that augments the useful feature information, inhibits useless feature information, and conducts feature reweighting. Next, we perform label localization to obtain the label probabilities and determine the final label set for each image. During this process, the number of labels must be determined. The optimal K value is obtained experimentally and used to determine the number of predicted labels, thereby solving the empty label set problem that occurs when the predicted label values of images are below a fixed threshold. Experiments on the Corel5k multilabel image dataset verify that CNN-2L improves the labeling precision by 18% and 15% compared with the traditional multiple-Bernoulli relevance model (MBRM) and joint equal contribution (JEC) algorithms, respectively, and it improves the recall by 6% compared with JEC. Additionally, it improves the precision by 20% and 11% compared with the deep learning methods Weight-KNN and adaptive hypergraph learning (AHL), respectively. Although CNN-2L fails to improve the recall compared with the semantic extension model (SEM), it improves the comprehensive index of the F1 value by 1%. The experimental results reveal that the proposed transfer learning model based on a label localization strategy is effective for automatic image annotation and substantially boosts the multilabel image annotation performance.
    Matched MeSH terms: Tomography, X-Ray Computed/methods*
  8. Kho SS, Yong MC, Chan SK, Tie ST
    Thorax, 2018 10;73(10):994-995.
    PMID: 29599199 DOI: 10.1136/thoraxjnl-2018-211729
    Matched MeSH terms: Tomography, X-Ray Computed/methods
  9. Ng TH, How SH, Kuan YC, Adzura, Aziz AA, Fauzi AR
    Malays J Pathol, 2009 Dec;31(2):147-50.
    PMID: 20514860 MyJurnal
    Klebsiella ozaenae is a Gram negative bacillus. It has been described as a colonizer of oral and nasopharyngeal mucosa and is a cause of atrophic rhinitis. Klebsiella ozaenae has seldom been isolated from serious infections. However, several reports have stated that Klebsiella ozaenae may cause invasive infections and even mortality. We report a 55-year-old man with Klebsiella ozaenae infection causing abscesses involving the right eye and left kidney and possibly also in the brain, lungs and prostate. The isolates were sensitive to ceftazidime, ciprofloxacin, chloramphenicol, gentamicin and sulfamethoxazole-trimethoprim but resistant to ampicillin. He responded well to 4 weeks of i.v. ceftazidime and i.v. amoxycillin-clavulanic acid. To our knowledge, such a multiorgan infection has not been reported previously for this organism.
    Matched MeSH terms: Tomography, X-Ray Computed
  10. Tan SH, Ganesan D, Prepageran N, Waran V
    Eur Arch Otorhinolaryngol, 2014 Nov;271(11):3101-5.
    PMID: 24986428 DOI: 10.1007/s00405-014-3149-5
    Matched MeSH terms: Tomography, X-Ray Computed
  11. Irfan M, Suzina SA
    Ann Acad Med Singap, 2010 Jan;39(1):72.
    PMID: 20126823
    Matched MeSH terms: Tomography, X-Ray Computed
  12. Al-Ameen Z, Sulong G
    Scanning, 2015 Mar-Apr;37(2):116-25.
    PMID: 25663630 DOI: 10.1002/sca.21187
    Contrast is a distinctive visual attribute that indicates the quality of an image. Computed Tomography (CT) images are often characterized as poor quality due to their low-contrast nature. Although many innovative ideas have been proposed to overcome this problem, the outcomes, especially in terms of accuracy, visual quality and speed, are falling short and there remains considerable room for improvement. Therefore, an improved version of the single-scale Retinex algorithm is proposed to enhance the contrast while preserving the standard brightness and natural appearance, with low implementation time and without accentuating the noise for CT images. The novelties of the proposed algorithm consist of tuning the standard single-scale Retinex, adding a normalized-ameliorated Sigmoid function and adapting some parameters to improve its enhancement ability. The proposed algorithm is tested with synthetically and naturally degraded low-contrast CT images, and its performance is also verified with contemporary enhancement techniques using two prevalent quality evaluation metrics-SSIM and UIQI. The results obtained from intensive experiments exhibited significant improvement not only in enhancing the contrast but also in increasing the visual quality of the processed images. Finally, the proposed low-complexity algorithm provided satisfactory results with no apparent errors and outperformed all the comparative methods.
    Matched MeSH terms: Tomography, X-Ray Computed
  13. Waran V, Vairavan N, Sia SF, Abdullah B
    J. Neurosurg., 2009 Dec;111(6):1127-30.
    PMID: 19408977 DOI: 10.3171/2009.4.JNS081506
    The authors describe a newly developed expandable cannula to enable a more efficient use of an endoscope in removing intraparenchymal spontaneous hypertensive intracerebral hematomas. The cannula is introduced like a conventional brain cannula, using neuronavigation techniques to reach the targeted hematoma accurately, and, once deployed, conventional microsurgical techniques are used under direct endoscopic visualization. This method was used in 6 patients, and, based on the results of intraoperative intracranial pressure monitoring and postoperative CT scanning, the authors were able to achieve good hematoma removal. They found that by using the expandable cannula, efficient endoscopic surgery in the brain parenchyma was possible.
    Matched MeSH terms: Tomography, X-Ray Computed
  14. Loh LC, Ong CK, Koo HJ, Lee SM, Lee JS, Oh YM, et al.
    PMID: 30174423 DOI: 10.2147/COPD.S165898
    Background: COPD-associated mortality was examined using a novel approach of phenotyping COPD based on computed tomography (CT)-emphysema index from quantitative CT (QCT) and post-bronchodilator (BD) forced expiratory volume in 1 second (FEV1) in a local Malaysian cohort.

    Patients and methods: Prospectively collected data of 112 eligible COPD subjects (mean age, 67 years; male, 93%; mean post-BD FEV1, 45.7%) was available for mortality analysis. Median follow-up time was 1,000 days (range, 60-1,400). QCT and clinicodemographic data were collected at study entry. Based on CT-emphysema index and post-BD FEV1% predicted, subjects were categorized into "emphysema-dominant," "airway-dominant," "mild mixed airway-emphysema," and "severe mixed airway-emphysema" diseases.

    Results: Sixteen patients (14.2%) died of COPD-associated causes. There were 29 (25.9%) "mild mixed," 23 (20.5%) "airway-dominant," 15 (13.4%) "emphysema-dominant," and 45 (40.2%) "severe mixed" cases. "Mild mixed" disease was proportionately more in Global Initiative for Chronic Obstructive Lung Disease (GOLD) Group A, while "severe mixed" disease was proportionately more in GOLD Groups B and D. Kaplan-Meier survival estimates showed increased mortality risk with "severe mixed" disease (log rank test, p=0.03) but not with GOLD groups (p=0.08). Univariate Cox proportionate hazard analysis showed that age, body mass index, long-term oxygen therapy, FEV1, forced volume capacity, COPD Assessment Test score, modified Medical Research Council score, St Georges' Respiratory Questionnaire score, CT-emphysema index, and "severe mixed" disease (vs "mild mixed" disease) were associated with mortality. Multivariate Cox analysis showed that age, body mass index, and COPD Assessment Test score remain independently associated with mortality.

    Conclusion: "Severe mixed airway-emphysema" disease may predict COPD-associated mortality. Age, body mass index, and COPD Assessment Test score remain as key mortality risk factors in our cohort.
    Matched MeSH terms: Tomography, X-Ray Computed/methods*
  15. Mohamad I, Abdullah B, Idris Z, Naik VR, Bhavaraju VM
    Ceylon Med J, 2011 Jun;56(2):73-4.
    PMID: 21789871
    Matched MeSH terms: Tomography, X-Ray Computed
  16. Lim KH, Liam CK, Wong CM
    Postgrad Med J, 2000 Aug;76(898):512, 518-9.
    PMID: 10908387
    Matched MeSH terms: Tomography, X-Ray Computed
  17. Nasir ZM, Azman M, Baki MM, Mohamed AS, Kew TY, Zaki FM
    Surg Radiol Anat, 2021 Aug;43(8):1225-1233.
    PMID: 33388863 DOI: 10.1007/s00276-020-02639-9
    PURPOSE: This study aims to determine laryngeal dimension in relation to all three transcutaneous injection laryngoplasty (TIL) approaches (thyrohyoid, transthyroid and cricothyroid) using three-dimensionally reconstructed Computed Tomography (CT) scan and compare the measurements between sex, age group and ethnicity.

    METHODS: CT scans of the neck of two hundred patients were analysed by two groups of raters. For thyrohyoid approach, mean distance from the superior border of the thyroid cartilage to the laryngeal cavity (THd) and mean angle from the superior border of the thyroid cartilage to mid-true cords (THa) were measured. For transthyroid approach, mean distance from mid-thyroid cartilage to mid-true cords (TTd) and Hounsfield unit (HU) at mid-thyroid cartilage (TTc) were measured. For cricothyroid approach, mean distance from the inferior border of the thyroid cartilage to the laryngeal cavity (CTd) and mean angle from the inferior border of the thyroid cartilage to mid-true cords (CTa) were measured.

    RESULTS: There were statistically significant differences between males and females for all measurements except for CTa (p  0.05). There was a significant fair positive correlation between age and TTc (p = 0.0002). For all measurements obtained, there were moderate to excellent inter-group consistency and intra-rater reliability.

    CONCLUSION: This study demonstrated a significant sex dimorphism that may influence the three TIL approaches except for needle angulation in the cricothyroid approach. The knowledge of laryngeal dimension is important to increase success in TIL procedure.

    Matched MeSH terms: Tomography, X-Ray Computed
  18. Loong S, Selvarajan S, Khor LY
    Malays J Pathol, 2019 Dec;41(3):327-331.
    PMID: 31901917
    INTRODUCTION: The increasing use of radiological imaging studies has given rise to 'incidentalomas'.

    CASE REPORT: We describe two unusual and diverse incidental adrenal gland lesions, an adenomatoid nodule and a mature ganglioneuroma. Both are deemed 'indeterminate' on radiological assessment. On histology, an adenomatoid nodule is composed of variably-dilated thin-walled cysts lined by bland flattened cells and solid areas of tubules lined by eosinophilic cells with plump nuclei and prominent nucleoli. The lining cells are immunoreactive for calretinin and WT1 while negative for CK5/6, ERG and CD31. Mature ganglioneuroma features fascicles of bland spindle cells with intermixed mature ganglion cells disposed within a background myxoid stroma with no immature neuroblastic component. These spindled Schwann cells are S100 positive.

    DISCUSSION: Both adenomatoid nodule and mature ganglioneuroma are rare benign adrenal tumours that need to be differentiated from other, more common adrenal lesions. The management of adrenal incidentalomas is challenging. Surgical excision is indicated if an adrenal incidentaloma is more than 4 cm in size, shows malignant features on imaging or evidence of hormone excess.

    Matched MeSH terms: Tomography, X-Ray Computed/methods
  19. Kwan MK, Jeffry A, Chan CY, Saw LB
    Surg Radiol Anat, 2012 Apr;34(3):217-27.
    PMID: 22194086 DOI: 10.1007/s00276-011-0919-2
    Studies of sacral pedicle anatomy have been reported in the European population. However, the feasibility for the use of S1, S2 and S2-ilium screws has not been fully investigated in the Asian population.
    Matched MeSH terms: Tomography, X-Ray Computed
  20. Abdul Ghani R, Norazmi MK, Norlaila M
    Med J Malaysia, 2006 Jun;61(2):254-7.
    PMID: 16898326 MyJurnal
    Pheochromocytoma is a rare catecholamine-secreting tumour typically arising within the adrenal medulla. It may occur sporadically or be associated as part of a tumour syndrome including Von Hippel Lindau (VHL), Multiple Endocrine Neoplasia (MEN) 2 and Neurofibromatosis Type 1. VHL is associated with multi-organ involvement of benign and malignant tumours characterized by the presence of retinal angiomas, hemangioblastomas of the cerebellum and spinal cord, renal cell carcinomas, pheochromocytomas and other cystic lesions in the kidneys, pancreas, and epididymis. It is a rare disorder with prevalence estimated at 2-3 per 100,000. This case report describes a 37 years old Chinese gentleman who presented to our institution for further management of bilateral pheochromocytoma and retinal angioblastoma with problems of duodenal ulcer and anaemia. There was no family history of similar problems. With these features the criteria for the diagnosis of von Hippel Lindau disease was established.
    Matched MeSH terms: Tomography, X-Ray Computed
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