Raw JSON
{'hasResults': False, 'derivedSection': {'miscInfoModule': {'versionHolder': '2025-12-24'}, 'conditionBrowseModule': {'meshes': [{'id': 'D018424', 'term': 'Cholesteatoma, Middle Ear'}], 'ancestors': [{'id': 'D004427', 'term': 'Ear Diseases'}, {'id': 'D010038', 'term': 'Otorhinolaryngologic Diseases'}, {'id': 'D002781', 'term': 'Cholesteatoma'}, {'id': 'D007642', 'term': 'Keratosis'}, {'id': 'D012871', 'term': 'Skin Diseases'}, {'id': 'D017437', 'term': 'Skin and Connective Tissue Diseases'}]}}, 'protocolSection': {'designModule': {'studyType': 'OBSERVATIONAL', 'designInfo': {'timePerspective': 'RETROSPECTIVE', 'observationalModel': 'COHORT'}, 'enrollmentInfo': {'type': 'ACTUAL', 'count': 17}, 'patientRegistry': False}, 'statusModule': {'overallStatus': 'COMPLETED', 'startDateStruct': {'date': '2013-01-01', 'type': 'ACTUAL'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2020-07', 'completionDateStruct': {'date': '2019-12-31', 'type': 'ACTUAL'}, 'lastUpdateSubmitDate': '2020-07-28', 'studyFirstSubmitDate': '2020-07-23', 'studyFirstSubmitQcDate': '2020-07-27', 'lastUpdatePostDateStruct': {'date': '2020-07-29', 'type': 'ACTUAL'}, 'studyFirstPostDateStruct': {'date': '2020-07-28', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2019-12-01', 'type': 'ACTUAL'}}, 'outcomesModule': {'primaryOutcomes': [{'measure': 'MRI sensitivity and specificity values as a function of the duration of the follow-up', 'timeFrame': '1 day', 'description': 'MRI sensitivity and specificity values as a function of the duration of the follow-up. Since no official recommendations are available in the literature, the decision regarding the number of MRIs and the time lapse between any two was left to the discretion of the surgeon'}], 'secondaryOutcomes': [{'measure': 'Receiver operating characteristics (ROC) curves', 'timeFrame': '1 day', 'description': 'the receiver operating characteristics (ROC) curves'}]}, 'oversightModule': {'oversightHasDmc': False, 'isFdaRegulatedDrug': False, 'isFdaRegulatedDevice': False}, 'conditionsModule': {'keywords': ['residual cholesteatoma', 'imaging follow-up', 'canal wall-up tympanoplasty', 'non-EP DWI'], 'conditions': ['Middle Ear Cholesteatoma']}, 'descriptionModule': {'briefSummary': 'Previous studies demonstrated the high diagnostic value of non-echoplanar diffusion weighted magnetic resonance imaging (non-EP DWI) for residual cholesteatoma. However, limited data are available regarding a suitable length of imaging follow-up. The present study aimed to determine the optimal duration of non-EP DWI follow-up for residual cholesteatoma', 'detailedDescription': 'A retrospective, monocentric study was performed between 2013 and 2019 and included all patients regularly followed-up after canal wall-up tympanoplasty with at least two non-EP DWI performed on the same 1.5T MRI scanner. MR images were reviewed independently by two radiologists. Sensitivity and specificity values were calculated as a function of time after the surgery. Receiver operating characteristics (ROC) curves were analyzed to determine the optimal follow-up duration.'}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['CHILD', 'ADULT', 'OLDER_ADULT'], 'samplingMethod': 'NON_PROBABILITY_SAMPLE', 'studyPopulation': 'Patients with history of middle-ear cholesteatoma, who underwent canal wall-up tympanoplasty and are therefore at risk of residual cholesteatoma', 'healthyVolunteers': False, 'eligibilityCriteria': 'Inclusion criteria:\n\n\\- patients regularly followed-up for middle ear cholesteatoma, who underwent two or more non-EP DWI performed on the same 1.5 Tesla MRI scanner\n\nExclusion criteria:\n\n\\- congenital cholesteatomas, tympanoplasty with canal wall-down technique, or suspicion of residual cholesteatoma on the first MRI follow-up'}, 'identificationModule': {'nctId': 'NCT04489550', 'briefTitle': 'How Long Must the MRI Follow-up Last to Safely Identify Middle Ear Residual Cholesteatoma', 'organization': {'class': 'OTHER', 'fullName': 'University Hospital, Montpellier'}, 'officialTitle': 'Optimal Duration of Magnetic Resonance Imaging (MRI) Follow-up to Safely Identify Middle Ear Residual Cholesteatoma', 'orgStudyIdInfo': {'id': 'RECHMPL20_0224'}}, 'contactsLocationsModule': {'locations': [{'zip': '34295', 'city': 'Montpellier', 'country': 'France', 'facility': 'Uhmontpellier', 'geoPoint': {'lat': 43.61093, 'lon': 3.87635}}], 'overallOfficials': [{'name': 'Frederic Venail, MD, PhD', 'role': 'STUDY_DIRECTOR', 'affiliation': 'University Hospital, Montpellier'}]}, 'ipdSharingStatementModule': {'ipdSharing': 'UNDECIDED', 'description': 'NC'}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'University Hospital, Montpellier', 'class': 'OTHER'}, 'responsibleParty': {'type': 'SPONSOR'}}}}