• J P Van Nieuwenhuyse, P Clapuyt, J Malghem, P Everarts, J Melin, S Pauwels, B Brichard, J Ninane, C Vermylen, and G Cornu.
• Department of Radiology and Medical Imaging, Cliniques Universitaires St-Luc, University of Louvain Medical School, Brussels, Belgium.
• Pediatr Radiol. 1996 Oct 1; 26 (10): 734-8.

BackgroundThe lack of a consensus in the literature on the imaging strategy in Langerhans cell histiocytosis (LCH) bone lesions in childhood.ObjectiveTo evaluate the relative value of radionuclide bone scan (RBS) and radiographic skeletal survey (RSS) in the detection of LCH bone lesions, both in the initial work-up of the disease and during the follow-up period.Materials And MethodsTen children with bone lesions evaluated by means of RSS and RBS in a retrospective study (1984-1993).ResultsFifty radiologically and/or scintigraphically abnormal foci were detected: 27 anomalies in the initial work-up (12 by both RSS and RBS, 8 by RSS only and 7 by RBS only) and 23 additional anomalies during follow-up (10 by both RSS and RBS, 10 by RSS only and 3 by RBS only). RSS+/RBS- lesions (n = 18) are more frequently encountered in the skull (P = 0.038), and more frequently lack radiologic signs of osteoblastic activity (P = 0.020), than RSS+/RBS+ lesions (n = 22). RSS-/ RBS+ abnormalities (n = 10) were most frequently insignificant.ConclusionIn the initial work-up both RSS and RBS should be carried out, while in the follow-up only RSS should be performed.

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