Displaying publications 61 - 73 of 73 in total

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  1. Ng KL, Del Vecchio SJ, Samaratunga H, Morais C, Rajandram R, Vesey DA, et al.
    Pathology, 2018 Aug;50(5):504-510.
    PMID: 29970253 DOI: 10.1016/j.pathol.2018.01.007
    One of the challenges in differentiating chromophobe renal cell carcinoma (chRCC) from benign renal oncocytoma (RO) is overlapping morphology between the two subtypes. The aim of this study was to investigate the usefulness of expression of leptin (Ob) and its receptor (ObR) in discriminating chRCC from RO. Sections from paraffin-embedded, formalin-fixed tumour nephrectomy specimens of 45 patients, made up of 30 chRCC (15 eosinophilic variant and 15 non-eosinophilic variant) and 15 RO, were used in this study. Samples (30) of clear cell RCC (ccRCC), the most common histological subtype, were used to verify staining patterns found by others in our cohort of Australasian patients. Matched morphologically normal non-cancer kidney tissues were included for each specimen. Sections were batch-immunostained using antibodies against Ob and ObR. Stained sections were digitally scanned using Aperio ImageScope, and the expression pattern of Ob and ObR was studied. In this cohort, male to female ratio was 2:1; median age was 64 (45-88 years); and median tumour size was 3.8 cm (range 1.2-18 cm). There were 47 (62.7%) T1, seven T2, 20 T3 and one T4 stage RCC. Two patients with ccRCC presented with metastases. Nuclear expression of Ob was significantly higher in RO compared with chRCC. The increased nuclear expression of Ob in RO compared with chRCC may be a useful aid in the difficult histological differentiation of RO from chRCC, especially eosinophilic variants of chRCC.
    Matched MeSH terms: Kidney Neoplasms/diagnosis; Kidney Neoplasms/metabolism*; Kidney Neoplasms/pathology
  2. Koh KB, Wightman JA, George J
    Med. J. Malaysia, 1996 Mar;51(1):148-50.
    PMID: 10967998
    Five cases of renal angiomyolipoma which underwent spontaneous rupture are described. These patients presented as an "acute abdomen" for which the diagnosis was not initially apparent. A high index of suspicion is required to make the diagnosis even with modern imaging techniques. The treatment of these tumours is discussed.
    Matched MeSH terms: Kidney Neoplasms/diagnosis*
  3. Koh KB, George J
    Scand. J. Urol. Nephrol., 1996 Aug;30(4):265-8.
    PMID: 8908645
    Angiomyolipomas are rare tumours of the kidney which have a tendency to bleed. We studied the clinical and radiological features of 11 patients from our institution to identify features which may be predictive of a massive haemorrhage. Tumours more than 6 cm in diameter were found to bleed and the demonstration of pseudoaneurysms on contrast CT scanning was associated with massive haemorrhage. We conclude that large angiomyolipomas should be treated to avoid haemorrhage and the detection of pseudoaneurysms should prompt urgent treatment.
    Matched MeSH terms: Kidney Neoplasms/complications
  4. Dutt AK
    Med J Malaya, 1969 Dec;24(2):161-3.
    PMID: 4244145
    Matched MeSH terms: Kidney Neoplasms*
  5. Mathew A, Cheng HM, Sam CK, Joab I, Prasad U, Cochet C
    Cancer Immunol. Immunother., 1994 Jan;38(1):68-70.
    PMID: 8299121
    The BamHI Z EBV replication activator (ZEBRA) protein is involved in the switch from latency to productive cycle of Epstein-Barr virus. A recombinant ZEBRA protein was synthesized and assessed in enzyme-linked immunosorbent assay (ELISA) for serum IgG response in nasopharyngeal carcinoma (NPC) patients. In 100 NPC serum samples that were positive for IgA to the EBV viral capsid antigen (VCA), 75% had IgG anti-ZEBRA antibodies. In contrast, only 3/83 (3.6%) serum samples from healthy donors and 2/50 (4%) from other cancers were positive for IgG to ZEBRA. Interestingly, in a selected group of 100 NPC sera negative for IgA to VCA, 25% contained IgG anti-ZEBRA antibodies. This suggests that the ELISA for IgG anti-ZEBRA may also identify earlier cases of NPC not detected by the conventional immunofluorescence test for IgA to VCA.
    Matched MeSH terms: Kidney Neoplasms/immunology
  6. Poh ME, Liam CK, Pang YK, Chua KT
    Respirol Case Rep, 2013 Dec;1(2):26-7.
    PMID: 25473534 DOI: 10.1002/rcr2.16
    We report a man presenting with dyspnea, cough, and hemoptysis due to left lung collapse from an endobronchial tumor obstructing the left main bronchus. Endobronchial biopsy of the tumor showed renal cell carcinoma, identical to a previous specimen of renal cell carcinoma removed by a radical left nephrectomy five years ago. The endobronchial tumor was removed by snare diathermy through a flexible bronchoscope, following which his symptoms resolved and the left lung re-expanded. Endobronchial metastasis from renal cell carcinoma is rare and can mimic obstruction from other endobronchial etiologies, such as bronchogenic carcinoma. Total lung collapse as a result is even more uncommon, although atelectasis is well described. Endobronchial techniques, such as snare diathermy, can relieve obstruction, providing symptom palliation even in advanced disease.
    Matched MeSH terms: Kidney Neoplasms
  7. Looi LM, Cheah PL
    Pathology, 1993 Apr;25(2):106-9.
    PMID: 8396229
    This study explores immunohistochemical characteristics that may be of diagnostic value in differentiating clear cell sarcoma of the kidney (CCSK) from Wilms' tumor (WT) and may provide some insight into the histogenesis of CCSK. Formalin-fixed, paraffin-embedded sections of 8 CCSK and 9 WT were stained, using the standard avidin-biotin peroxidase complex method, for vimentin (VIM), Factor-8 related antigen (F8A), epithelial membrane antigen (EMA), desmin (DES), S-100 protein and Mac 387. CCSK cells consistently exhibited moderate to strong diffuse cytoplasmic positivity for VIM and were negative for F8A, EMA, DES, S-100 and Mac 387. In contrast, only patchy groups of stromal cells and primitive glomeruloid structures in WT exhibited VIM-positivity. Blastemal cells were VIM-negative. Stromal cells with rhabdomyomatous differentiation exhibited cytoplasmic positivity for DES. Epithelial cells of maturing tubular structures showed EMA-positivity whereas immature tubular structures were EMA-negative. Neither blastemal, stromal nor epithelial elements in WT were positive for F8A, S-100 or Mac 387. Podocytes and mesangial cells of glomeruli in 3 mid-trimester human abortuses (controls) exhibited moderate to strong VIM-positivity. The importance of differentiating CCSK from WT has been repeatedly emphasized because of its poorer prognosis and the necessity of adding Adriamycin to the chemotherapeutic regime. The consistent VIM-positivity of CCSK cells can be a useful feature in differentiating it from "blastemal-predominant" WT, with which it is often confused. Although vimentin expression by CCSK cells is consistent with a mesenchymal character, the possibility of a histogenetic link with glomerular podocytes or mesangial cells should also be considered.
    Matched MeSH terms: Kidney Neoplasms/pathology*; Kidney Neoplasms/chemistry
  8. Cheah PL, Looi LM, Chan LL
    Histopathology, 1996 Jan;28(1):49-54.
    PMID: 8838120
    Wilms' tumour (nephroblastoma) has been associated with chromosomal abnormalities at the 11p13, 11p15 and 16q regions. A study into the possibility of mutations occurring within p53, the ubiquitous adult tumour suppressor gene, in Wilms' tumour was carried out. Thirty-eight cases were studied. Of these 36 were categorised into the favourable histology group and two into the unfavourable histology group based on the National Wilms' Tumour Study criteria. Archival formalin-fixed, paraffin-embedded tissue sections from each case were stained with a polyclonal (AB565:Chemicon) and a monoclonal (DO7:Dako) antibody raised against p53 protein using a peroxidase-labelled streptavidin biotin kit (Dako). 'Cure' (disease-free survival of 60 months or longer) was documented in 39% of cases with favourable histology tumours. Eleven percent in this group succumbed to the disease. Both cases with unfavourable histology died. Four out of 36 (11%) tumours with favourable histology demonstrated weak to moderate staining with both AB565 and DO7 in more than 75% of tumour cells. In contrast, p53 protein expression in unfavourable histology tumours was significantly increased compared with the favourable histology group (P = 0.021) with both cases demonstrating immunopositivity in > 75% of tumour cells when stained with AB565 and DO7. The intensity of staining ranged from moderate to strong in both cases. It appears from this preliminary study that the immunohistochemical expression of p53 protein in Wilms' tumour, presumably a result of mutation in the p53 tumour suppressor gene, correlates with histological classification, histological categorisation being one of the useful features in the prognostic assessment of Wilms' tumours.
    Matched MeSH terms: Kidney Neoplasms/genetics; Kidney Neoplasms/metabolism; Kidney Neoplasms/pathology*
  9. Haritharan T, Sritharan S, Bhimji S
    Med. J. Malaysia, 2006 Oct;61(4):493-5.
    PMID: 17243531 MyJurnal
    Renal angiomyolipomas are innocuous benign tumours which rarely behave aggressively. This is a case of a 48 year old Malay lady presenting with right sided abdominal pain associated with a large right sided abdominal mass. She was diagnosed with renal angiomyolipoma of the right kidney complicated by inferior vena caval tumour thrombosis. She successfully underwent a radical nephrectomy and inferior vena caval thrombectomy using cardiopulmonary bypass and deep hypothermic circulatory arrest.
    Matched MeSH terms: Kidney Neoplasms/pathology*; Kidney Neoplasms/surgery
  10. Rohana J, Boo NY, Hayati AR, Baizura J
    Med. J. Malaysia, 2002 Sep;57(3):364-7.
    PMID: 12440278
    A term newborn infant developed hypovolaemic shock shortly after birth. She was pale with gross hepatomegaly. She required multiple boluses of intravenous fluids, blood products as well as inotropic support. Blood investigations showed persistent thrombocytopenia, anaemia and disseminated intravascular coagulopathy (DIC). She also developed heart failure. She finally succumbed on the eleventh day of life. Autopsy revealed haemangiomatosis involving the liver, lungs, gastrointestinal tract, kidneys and adrenals.
    Matched MeSH terms: Kidney Neoplasms/complications*; Kidney Neoplasms/congenital*
  11. Christopher, C.K.H., Praveen, S., Goh, E.H., Tan, G.H., Rozman, Z., Zulkifli, M.Z., et al.
    MyJurnal
    Dermoid cyst in a kidney is rarely seen. We report a case of intrarenal dermoid cyst which mimics malignant renal tumour and discuss the dilemma in managing this disease.
    Matched MeSH terms: Kidney Neoplasms
  12. Kadhim Jawad Obaid, Yahya Mohammad Arpine, Nor Salmah Bakar, Marlina Tanty Ramli Hamid, Ahmed Ramzi Yusof
    MyJurnal
    Intramuscular shoulder angiomyolipomas are very rare. We report a case in a 22-year-old male with a well circumscribed lesion located on the back of the shoulder. This lesion, differs from renal angiomyolipoma in terms of non-association with tuberous sclerosis, circumscription and male predominance. Another characteristic feature is the absence of epithelioid cells. Differential diagnosis includes lipoma, angiolipoma, angioleiomyoma, hemangioma, myolipoma and liposarcoma. It is distinguished from the above mentioned entities by the presence of a combination of thick-walled blood vessels, smooth muscle and fat.
    Matched MeSH terms: Kidney Neoplasms
  13. Kadhim Jawad Obaid, Yahya Mohammad Arpine, Nor Salmah Bakar, Marlina Tanty Ramli Hamid, Ahmed Ramzi Yusof
    Intramuscular shoulder angiomyolipomas are very rare. We report a case in a 22-year-old male with a well circumscribed lesion located on the back of the shoulder. This lesion, differs from renal angiomyolipoma in terms of non-association with tuberous sclerosis, circumscription and male predominance. Another characteristic feature is the absence of epithelioid cells. Differential diagnosis includes lipoma, angiolipoma, angioleiomyoma, hemangioma, myolipoma and liposarcoma. It is distinguished from the above mentioned entities by the presence of a combination of thick-walled blood vessels, smooth muscle and fat.
    Matched MeSH terms: Kidney Neoplasms
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