38 research outputs found

    Performance Characteristics Of Cerebrospinal Fluid Cytology: An Analysis Of Responses From The College Of American Pathologists Nongynecologic Cytopathology Education Program

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    Context.-Cerebrospinal fluid cytology is a critical diagnostic tool for the diagnosis of many conditions affecting the central nervous system. Objective.-To assess the performance characteristics of cerebrospinal fluid cytology samples by evaluating participant interpretations within the College of American Pathologists Nongynecologic Cytopathology Education program. Design.-Participant interpretations (N 1/4 46 264) evaluated in the College of American Pathologists Nongynecologic Cytopathology Education Program were examined for concordance with the general category and with the reference diagnosis. Two nonlinear mixed models were used to analyze the concordance rates. Results.-The overall concordance rates for the general category and reference diagnosis were 92.1% and 81.0%, respectively. In the malignant category, the concordance rates with the reference diagnosis were lowest for diagnoses of nonhematopoietic small blue round cell tumors (54.8%) and metastatic malignancy (77.5%); the concordance rate with the reference diagnosis was highest for leukemia/ lymphoma (94.0%). In the benign category, the concordance rate was lowest for normal cerebrospinal fluid reference diagnoses (58.6%), followed by acute and chronic inflammation (64.6%), fungal infection (80.8%), and macrophages (85.3%). Significant differences in concordance were uncovered when performance was evaluated by participant type and stain technique. Leukemia/lymphoma was the most common diagnosis for misclassified nonhematopoietic small blue round cell tumor cases and negative or inflammatory cerebrospinal fluid cases. Conclusions.-This study illustrates the difficulties in achieving accurate diagnoses from cerebrospinal fluid specimens, particularly for nonhematopoietic small blue round cell tumors and normal and inflammatory cerebrospinal fluid specimens

    Outcome of patients with localized orbital sarcoma who relapsed following treatment on Intergroup Rhabdomyosarcoma Study Group (IRSG) Protocols-III and -IV, 1984-1997: a report from the Children\u27s Oncology Group

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    BACKGROUND: We wanted to ascertain patterns of recurrence, re-treatment, and outcome among 188 eligible patients treated for localized orbital sarcoma on IRSG Protocols III/IV, 1984-1997. PROCEDURE: Retrospective chart review. RESULTS: Twenty-four of 188 patients (12.8%) developed local (n = 22) or distant relapse (n = 2) at 0.057-7.05 years (median, 1.58) after enrollment. Ages at study entry were 0.14-17 years (median, 5 years). Initial tumor operations included biopsy (n = 20) or gross resection with microscopic residual (n = 4). Initial tumor diameters were 0.5-7 cm (median, 3). Pathologic subtypes were embryonal rhabdomyosarcoma (ERMS, n = 19), sarcoma not otherwise specified (n = 2), and alveolar RMS, botryoid ERMS, or undifferentiated sarcoma (n = 1 each). Initial treatment included vincristine/dactinomycin (n = 24) including an alkylator (n = 4) and radiotherapy (RT, n = 21). Twenty patients responded, 14 completely, 6 partially. After recurrence, patients underwent orbital exenteration (n = 10), enucleation (2), tumor excision (3), or biopsy (1); 7 had no operation, and 1 had no data. Post-relapse chemotherapy included combinations of etoposide (n = 14 patients), doxorubicin (14), ifosfamide (12), cyclophosphamide (7), and dacarbazine (n = 1). Six patients received RT, including four previously treated and two not irradiated initially. Two patients died; one at 1.79 years after contralateral brain metastasis followed by local recurrence, and another at 2.49 years after multiple local recurrences. Twenty-two patients (91.7%) survived sarcoma-free for 0.04-17 years (median, 6.9) after relapse, and 18 of 22 (82%) were alive \u3e/=5 years after relapse. CONCLUSION: Survival following recurrent localized orbital sarcoma appears likely after vigorous re-treatment given with curative intent

    Postmortem imaging of antemortem myocardial ischaemia

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    To determine the minimum survival time for detection of antemortem myocardial ischaemia with postmortem imaging (PMI) techniques

    The prognostic significance of anaplasia in childhood rhabdomyosarcoma: A report from the Childrens Oncology Group.

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    BACKGROUND: Established prognostic indicators in rhabdomyosarcoma (RMS), the most common childhood soft tissue sarcoma, include several clinicopathologic features. Among pathologic features, anaplasia has been suggested as a potential prognostic indicator, but the clinical significance of anaplasia remains unclear. METHODS: Patients enrolled on one of five recent Childrens Oncology Group clinical trials for RMS (D9602, n = 357; D9802, n = 80; D9803, n = 462; ARST0331, n = 335; and ARST0531, n = 414) with prospective central pathology review were included in this study. Clinicopathologic variables including demographic information, risk group, histologic subtype, and anaplasia were recorded along with overall survival (OS) and failure-free survival (FFS) with failure defined by recurrence, progression, or death. The log-rank test was used to compare OS and FFS. RESULTS: Anaplasia was more common in embryonal RMS (27% of all embryonal RMS) than other subtypes of RMS (11% for alveolar RMS, 7% for botryoid RMS, 11% for spindle cell RMS). On multivariate analyses, anaplasia was not an independent prognostic factor in RMS (OS:hazard ratio (HR) = 1.12, p = 0.43; FFS:HR = 1.07, p = 0.56) across all subtypes or within embryonal RMS only (OS:HR = 1.41, p = 0.078; FFS:HR = 1.25, p = 0.16). Among tumors with TP53 mutations, 69% had anaplasia, while only 24% of tumors with anaplasia had a tumoral TP53 mutation. CONCLUSIONS: Anaplasia is not an independent indicator of adverse outcomes in RMS. Emerging information on the prognostic significance of TP53 mutations raises the possibility that anaplasia may be a surrogate marker of TP53 mutations in some cases. Tumoral TP53 mutation status may be investigated as a prognostic indicator in future studies
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