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{'hasResults': False, 'derivedSection': {'miscInfoModule': {'versionHolder': '2025-12-24'}, 'conditionBrowseModule': {'meshes': [{'id': 'D007938', 'term': 'Leukemia'}, {'id': 'D054198', 'term': 'Precursor Cell Lymphoblastic Leukemia-Lymphoma'}], 'ancestors': [{'id': 'D009370', 'term': 'Neoplasms by Histologic Type'}, {'id': 'D009369', 'term': 'Neoplasms'}, {'id': 'D006402', 'term': 'Hematologic Diseases'}, {'id': 'D006425', 'term': 'Hemic and Lymphatic Diseases'}, {'id': 'D007945', 'term': 'Leukemia, Lymphoid'}, {'id': 'D008232', 'term': 'Lymphoproliferative Disorders'}, {'id': 'D008206', 'term': 'Lymphatic Diseases'}, {'id': 'D007160', 'term': 'Immunoproliferative Disorders'}, {'id': 'D007154', 'term': 'Immune System Diseases'}]}, 'interventionBrowseModule': {'meshes': [{'id': 'D054458', 'term': 'Amplified Fragment Length Polymorphism Analysis'}], 'ancestors': [{'id': 'D016172', 'term': 'DNA Fingerprinting'}, {'id': 'D005821', 'term': 'Genetic Techniques'}, {'id': 'D008919', 'term': 'Investigative Techniques'}, {'id': 'D016133', 'term': 'Polymerase Chain Reaction'}, {'id': 'D021141', 'term': 'Nucleic Acid Amplification Techniques'}]}}, 'protocolSection': {'designModule': {'studyType': 'OBSERVATIONAL', 'designInfo': {'timePerspective': 'RETROSPECTIVE', 'observationalModel': 'COHORT'}, 'enrollmentInfo': {'type': 'ESTIMATED', 'count': 671}, 'patientRegistry': False}, 'statusModule': {'overallStatus': 'COMPLETED', 'startDateStruct': {'date': '2005-03'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2016-05', 'completionDateStruct': {'date': '2016-05', 'type': 'ACTUAL'}, 'lastUpdateSubmitDate': '2016-05-09', 'studyFirstSubmitDate': '2009-05-09', 'studyFirstSubmitQcDate': '2009-05-09', 'lastUpdatePostDateStruct': {'date': '2016-05-11', 'type': 'ESTIMATED'}, 'studyFirstPostDateStruct': {'date': '2009-05-12', 'type': 'ESTIMATED'}, 'primaryCompletionDateStruct': {'date': '2016-05', 'type': 'ACTUAL'}}, 'outcomesModule': {'primaryOutcomes': [{'measure': 'Identification of possible pharmacogenetic risk factors for avascular necrosis', 'timeFrame': 'length of study'}, {'measure': 'Comparison of whether thymidylate synthase 2/2 enhancer repeat genotype and vitamin D receptor C/C start site genotype are more common among patients who developed avascular necrosis than among patients who did not', 'timeFrame': 'length of study'}]}, 'oversightModule': {'oversightHasDmc': False}, 'conditionsModule': {'keywords': ['childhood acute lymphoblastic leukemia'], 'conditions': ['Leukemia']}, 'referencesModule': {'references': [{'type': 'RESULT', 'citation': 'Hamilton LH, Mattano LA, Sather HN, et al.: A SERPINE1 (PAI-1) single nucleotide polymorphism predicts osteonecrosis in children treated for acute lymphoblastic leukemia: results of the Childrens Oncology Group (COG) study AALL03B2. [Abstract] Blood 108 (11): A-709, 2006.'}]}, 'descriptionModule': {'briefSummary': 'RATIONALE: Studying samples of tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to bone tissue death.\n\nPURPOSE: This laboratory study is looking at risk factors for bone tissue death in young patients with acute lymphoblastic leukemia treated on clinical trial CCG-1882.', 'detailedDescription': 'OBJECTIVES:\n\n* Identify possible pharmacogenetic risk factors for avascular necrosis (AVN) in pediatric patients who received intensive therapy for acute lymphoblastic leukemia on clinical trial CCG-1882.\n* Compare whether thymidylate synthase 2/2 enhancer repeat genotype and vitamin D receptor C/C start site genotype are more common among patients who developed AVN than among patients who did not.\n\nOUTLINE: This is a retrospective, cohort, multicenter study. Patients are stratified according to gender and treatment regimen on clinical trial CCG-1882 (augmented vs regular Berlin-Frankfurt-Munster).\n\nDNA is extracted from slides of blast samples that were previously obtained from patients treated on clinical trial CCG-1882. DNA genotyping is performed, and genotypes (proportion of population with variant alleles or frequency of variant alleles) are compared between patients who did and did not develop avascular necrosis.\n\nPROJECTED ACCRUAL: A total of 671 tissue samples from patients (294 females and 377 males) will be accrued for this study.'}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['CHILD'], 'maximumAge': '120 Months', 'minimumAge': '10 Years', 'samplingMethod': 'NON_PROBABILITY_SAMPLE', 'studyPopulation': 'Pediatric patients who received intensive therapy for acute lymphoblastic leukemia on clinical trial CCG-1882.', 'healthyVolunteers': False, 'eligibilityCriteria': 'DISEASE CHARACTERISTICS:\n\n* Diagnosis of acute lymphoblastic leukemia (ALL)\n\n * Has diagnostic ALL blast sample slides available for DNA extraction\n* Previously treated on clinical trial CCG-1882\n\nPATIENT CHARACTERISTICS:\n\nAge\n\n* 10 and over at diagnosis\n\nPerformance status\n\n* Not specified\n\nLife expectancy\n\n* Not specified\n\nHematopoietic\n\n* Not specified\n\nHepatic\n\n* Not specified\n\nRenal\n\n* Not specified\n\nPRIOR CONCURRENT THERAPY:\n\nBiologic therapy\n\n* Not specified\n\nChemotherapy\n\n* Not specified\n\nEndocrine therapy\n\n* Not specified\n\nRadiotherapy\n\n* Not specified\n\nSurgery\n\n* Not specified'}, 'identificationModule': {'nctId': 'NCT00898469', 'briefTitle': 'Identifying Risk Factors for Bone Tissue Death in Young Patients With Acute Lymphoblastic Leukemia Treated on Clinical Trial CCG-1882', 'organization': {'class': 'NETWORK', 'fullName': "Children's Oncology Group"}, 'officialTitle': 'Study Of Pharmacogenetic Risk Factors For Avascular Necrosis CCG 1882', 'orgStudyIdInfo': {'id': 'AALL03B2'}, 'secondaryIdInfos': [{'id': 'COG-AALL03B2', 'type': 'OTHER', 'domain': "Children's Oncology Group"}, {'id': 'CDR0000304752', 'type': 'OTHER', 'domain': 'Clinical Trials.gov'}]}, 'armsInterventionsModule': {'interventions': [{'name': 'polymorphism analysis', 'type': 'GENETIC'}]}, 'contactsLocationsModule': {'overallOfficials': [{'name': 'Mary Relling, PharmD', 'role': 'STUDY_CHAIR', 'affiliation': "St. Jude Children's Research Hospital"}]}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': "Children's Oncology Group", 'class': 'NETWORK'}, 'collaborators': [{'name': 'National Cancer Institute (NCI)', 'class': 'NIH'}], 'responsibleParty': {'type': 'SPONSOR'}}}}