Wong D.D.,Hospital Ave |
Wong D.D.,University of Western Australia |
Spagnolo D.V.,Hospital Ave |
Spagnolo D.V.,University of Western Australia |
And 5 more authors.
Human Pathology | Year: 2011
Oncocytic adrenocortical neoplasms (OANs) are a rare but important subtype of adrenal tumors with unique clinical and morphological features. We present 13 previously unpublished cases, of which 3 were classified as benign, 2 as having borderline malignant potential, and 8 as malignant according to the Lin-Weiss-Bisceglia criteria. Seven tumors (54%) showed evidence of endocrine activity. All were composed of more than 90% oncocytes confirmed immunohistochemically using the antimitochondrial antibody mES-13 and ultrastructurally in 4 cases. Small oncocytes were a frequent finding that challenges the conventional notion of oncocytes as necessarily having abundant cytoplasm. Most cases were immunoreactive for vimentin, synaptophysin, inhibin-α, melan A, and calretinin, the latter being a novel finding in this group of neoplasms. Cytokeratin positivity with AE1/AE3 and CAM5.2 was variable. The literature was comprehensively reviewed to identify all cases of OANs reported to date. Hormone production is not as uncommon as previously believed, occurring in 30%. The Lin-Weiss-Bisceglia criteria were retrospectively applied to all published cases with sufficient information and were shown to effectively separate tumors according to their future risk of recurrence and survival using Kaplan-Meier survival curves (log-rank test, P < .001 for both). The estimated overall median survival for malignant oncocytic neoplasms is 58 months (95% confidence interval = 27.5-88.5 months), providing the first preliminary evidence that the prognosis of malignant OANs is likely to be more favorable than conventional adrenocortical carcinomas, in which the reported median survival is between 14 and 32 months. © 2011 Elsevier Inc. All rights reserved.
PubMed | Envoi Pathology, Medical Center, Harvard University and St John of God Pathology
Type: Journal Article | Journal: Histopathology | Year: 2016
Rare gastric lesions composed of a combined proliferation of chief and oxyntic cells have been variably called adenocarcinoma of fundic gland type and oxyntic gland polyp/adenoma. Herein, we present a series of cases that show a morphological spectrum of chief and oxyntic cell proliferations.Routine and consultation cases were collated from five institutions. Information regarding site, size, endoscopic appearance, clinical history and medication use, when available, was accrued, as was the histological features and immunoprofiles. A total of 12 cases were collated. Age ranged from 39 to 81 years. All the lesions were located in the fundus; seven of eight were polypoid lesions endoscopically. Lesions were primarily solitary, averaged 4.6 mm in diameter (largest 9 mm) and comprised >50% chief cells. The predominant architectural pattern was of anastomosing and solid and clustered glands or a mixture of these patterns. Lesions were limited mainly to the mucosa, although two showed submucosal involvement. None had known metastatic disease.This series included lesions that were previously described as gastric adenocarcinoma of fundic gland type and oxyntic gland polyp/adenoma. They are located exclusively in the fundus and composed predominantly of chief cells with low-grade cytology and appear to show a morphological continuum.
Friedman N.D.,Barwon Health |
Walton A.L.,Barwon Health |
Boyd S.,Barwon Health |
Tremonti C.,Deakin University |
And 5 more authors.
American Journal of Infection Control | Year: 2013
Background: Environmental contamination is a reservoir for vancomycin-resistant enterococcus (VRE) in hospitals. Methods: Environmental sampling of surfaces was undertaken anytime before disinfection and 1 hour after disinfection utilizing a sodium dichloroisocyanurate-based, 3-staged protocol (phase 1) or benzalkonium chloride-based, single-stage clean (phase 2). VRE colonization and infection rates are presented from 2010 to 2011, and audits of cleaning completeness were also analyzed. Results: Environmental samples collected before disinfection were significantly more likely to be contaminated with VRE during phase 1 than phase 2: 25.2% versus 4.6%, respectively; odds ratio (OR), 7.01 (P <.01). Environmental samples collected after disinfection were also significantly more likely to yield VRE during phase 1 compared with phase 2: 11.2% versus 1.1%, respectively; OR, 11.73 (P <.01). Rates of VRE colonization were higher during 2010 than 2011. Cleaning audits showed similar results over both time periods. Conclusion: During use of a chlorine-based, 3-staged protocol, significantly higher residual levels of VRE contamination were identified, compared with levels detected during use of a benzalkonium chloride-based product for disinfection. This reduction in VRE may be due to a new disinfection product, more attention to the thoroughness of cleaning, or other supplementary efforts in our institution. © 2013 by the Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc. All rights reserved.
PubMed | Royal Perth Hospital, Fiona Stanley Hospital, St John of God Pathology and Hospital Avenue
Type: Journal Article | Journal: Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin | Year: 2016
Following the reported link between heater-cooler unit (HCU) colonisation with Mycobacterium chimaera and endocarditis, mycobacterial sampling of all HCUs in use in Western Australia was initiated from August 2015, revealing M. chimaera colonisation in 10 of 15 HCUs. After M. chimaera was isolated from a pleural biopsy from a cardiothoracic patient who may have been exposed to a colonised HCU, a whole genome sequencing investigation was performed involving 65 specimens from 15 HCUs across five hospitals to assess if this infection was related to the HCU. Genetic relatedness was found between the 10 HCU M. chimaera isolates from four hospitals. However the M. chimaera isolate from the cardiothoracic patient was not genetically related to the HCU M. chimaera isolates from that hospital, nor to the other HCU isolates, indicating that the HCUs were not the source of the infection in this patient.
Joly Y.,McGill University |
Zeps N.,St John of God Pathology |
Zeps N.,University of Western Australia |
Knoppers B.M.,McGill University
Human Genetics | Year: 2011
Large-scale, public genomic databases have greatly improved the capacity of researchers to do genomic research. In order to ensure that the scientific community uses data from these public resources properly, data access agreements have been developed to complement already existing legal and ethical norms. Sanctions to address cases of data misuse constitute an essential part of this compliance framework meant to protect stakeholders in genomic research. Yet very little research and community debate has been done on this most important topic. This paper presents a review of different sanctions that could be invoked in cases of non-compliance from data users. They have been identified through comprehensive research and analysis of over 450 documents (journal articles, policy, guidelines, access policies, etc.) related to this topic. Given the considerable impact on users of even the milder sanctions considered in our paper, it is essential that stakeholders strive to achieve the highest degree of standardization and transparency when designing controlled-access agreements. It is only fair, after all, that users be able to expect that the border between acceptable and unacceptable conduct is clearly delineated and predictable in controlled-access policies. This suggests the importance for researchers to undertake additional empirical studies on the clarity and accessibility of existing database access agreements and related policies in the near future. © Springer-Verlag 2011.
Bell D.A.,University of Western Australia |
Bell D.A.,PathWest Royal Perth Hospital |
Bell D.A.,Royal Perth Hospital |
Hooper A.J.,University of Western Australia |
And 10 more authors.
Atherosclerosis | Year: 2014
Objective: To determine whether a telephone call from a chemical pathologist to the requesting general practitioner (GP) of individuals at high risk of familial hypercholesterolaemia (FH) increases specialist referral and detection of FH. Method: Individuals with an LDL-cholesterol ≥6.5mmol/L without secondary causes were identified from a community laboratory; 100 cases and 96 historical controls. All laboratory reports (cases and controls) received interpretative comments highlighting FH. In addition, the cases' GPs received a telephone call from the chemical pathologist to highlight their patient's risk of FH and suggest specialist referral, whereas with the controls' GPs were not telephoned. Results: After 12 months follow-up, 27 (27%) cases were referred to clinic compared with 4 (4%) controls (p<0.0001). 25 cases were reviewed at clinic, 12 (48%) had definite FH and 18 (72%) had probable or definite FH according to the Dutch Lipid Clinic Network Criteria, 2 cases did not attend their clinic appointments. Genetic testing was performed in 23 individuals: 7 (30%) had pathogenic FH mutations. Genotypic cascade screening of 4 kindreds from the intervention group detected an additional 7 individuals with FH and excluded 5 mutation-negative family members. Conclusions: A telephone call from a chemical pathologist to the requesting GP of patients at high risk of FH was associated with significantly higher rates of FH detection and specialist referral. Over 70% of individuals with an LDL-cholesterol ≥6.5mmol/L were diagnosed with FH. However, further investigation is required to improve the relatively low referral rate. © 2014 Elsevier Ireland Ltd.
PubMed | Royal Perth Hospital, University of Western Australia and St John of God Pathology
Type: Journal Article | Journal: Pathology | Year: 2016
Familial hypercholesterolaemia (FH) is an under-diagnosed inherited condition characterised by elevated low density lipoprotein (LDL)-cholesterol and premature coronary artery disease. The requesting general practitioner of individuals with extremely elevated LDL-cholesterol measured by St John of God Pathology receives an interpretative comment on the lipid results highlighting possible FH. We sought to determine whether specifically recommending referral to the regional Lipid Disorders Clinic (LDC) increased referral and FH detection rates. A prospective case-control study of individuals with LDL-cholesterol 6.5 mmol/L was conducted. All individuals received an interpretative comment highlighting the possibility of FH. The cases comment also suggested LDC referral, and a subset of cases received the LDCs fax number (fax-cases) in addition. There were 231 individuals with an LDL-cholesterol 6.5 mmol/L; 96 (42%) controls and 135 (58%) cases, of which 99 were fax-cases. Twenty-four (18%) cases were referred to clinic compared with eight (8%) controls (p= 0.035). After specialist review and genetic testing, four probable and four definite FH individuals were detected amongst controls, compared with seven possible, eight probable and nine definite FH amongst cases. Genetic testing was performed in 31 (94%) individuals, 13 (42%) had a causative mutation identified. Interpretative commenting specifically recommending specialist review augments the detection of FH in the community.
PubMed | St John of God Pathology and King Edward Memorial Hospital
Type: Journal Article | Journal: Diagnostic cytopathology | Year: 2015
Stratified mucin-producing intraepithelial lesion (SMILE) is an uncommon variant of in situ carcinoma of the cervix. This study aimed to identify the cytologic features of SMILE since these have not been well documented previously.The study group comprised 34 consecutive cases of SMILE encountered at a single institution in which a corresponding Papanicolaou smear, taken up to 12 months before histologic diagnosis, was available for review. The presence of associated cervical neoplastic lesions including cervical intraepithelial neoplasia (CIN), adenocarcinoma in situ (AIS), and invasive carcinoma was recorded. The linear extent and distribution of the SMILEs was also noted.Most Pap smears had been reported to show possible or definite high-grade CIN although 3 cases reported the presence of a high-grade glandular abnormality. No case had a prospective cytologic diagnosis of SMILE. Histology revealed concurrent CIN and/or AIS in all cases, and 1 specimen (3%) showed invasive adenocarcinoma. Following smear review, 23 of the 31 cases that included endocervical material showed recurrent cytologic features that appeared consistent with SMILE. These included three dimensional cell clusters with nuclear stratification and crowding, mild nuclear atypia, cytoplasmic vacuoles, mitotic figures, and apoptosis.SMILE is almost always associated with additional HPV-related neoplastic lesions although only one patient (3%) had invasive carcinoma, a lower rate than recorded in other studies. Consistent cytologic features associated with SMILE were identified but these were relatively subtle. However, increased awareness of these features may permit prospective diagnosis and this could influence patient management.
PubMed | St John of God Hospital and St John of God Pathology
Type: Case Reports | Journal: Endocrine pathology | Year: 2015
Papillary carcinomas of thyroid type rarely arise within struma ovarii. There are limited data on the immunohistochemical and molecular features of these tumors. Three cases of papillary carcinoma arising in struma ovarii (PCSO) were identified. The clinicopathological features were reviewed and immunohistochemical staining for HBME-1, cytokeratin (CK) 19, and CD56 was performed. Tumor DNA was sequenced for somatic mutations using a panel of 26 oncogenes, with a particular focus on BRAF and KRAS mutations. The patients were aged 22, 48, and 55 years. All cases were FIGO stage IA. Two tumors were of classical histological type, and one was a follicular variant papillary carcinoma. All tumors expressed HBME-1 and two were positive for CK19. CD56 was negative in all three cases. One tumor demonstrated a BRAF G469A mutation in exon 11, and in a second case, a KRAS Q61K double base mutation in exon 3 was detected. These mutations have not been described previously in PCSO. No mutations were detected in the benign follicular components of the tumors adjacent to the malignant papillary tissue. None of the patients had tumor recurrence on clinical follow-up (range 11 months to 8years). HBME-1, CK19, and CD56 are useful immunohistochemical markers of PCSO. Novel BRAF and KRAS mutations were identified in two of three tumors suggesting that mutations in PCSO may differ from those commonly identified in papillary carcinoma of the eutopic thyroid. The clinical significance of these mutations is uncertain but follow-up data in this small series support the generally good prognosis of PCSO.
PubMed | St John of God Subiaco Hospital, The University of Notre Dame Australia and St John of God Pathology
Type: | Journal: ANZ journal of surgery | Year: 2015
Pathological complete response following neoadjuvant chemoradiotherapy (CRT) for locally advanced rectal cancer is associated with reduced local recurrence and improved long-term outcome. However, the prognostic value of a partial response, or of tumour regression in patients with metastatic disease, is less clear.We present a single-centre cohort study of 205 patients with stage II-IV rectal cancer treated with surgery and neoadjuvant CRT between 2006 and 2013. Tumour regression was assessed using the Dworak system.The probability of 3-year recurrence-free survival (RFS) was 95% for Dworak grade 4, 82% for grade 3, 64% for grade 2 and 53% for grade 1 (P = 0.0005). In univariate regression analysis, Dworak grade was associated with RFS (hazard ratio (HR) 0.51, P < 0.0001; trend analysis) and cancer-specific survival (HR 0.52, P = 0.002). In multivariate analysis, Dworak grade remained an independent predictor of RFS (HR 0.62, P = 0.012), along with clinical metastases stage, resection margin status, the presence or absence of extramural venous invasion and type of surgical procedure.Tumour regression grade after neoadjuvant CRT was an independent prognostic factor for RFS, highlighting the importance of the degree of local response to CRT.