Diagnostic methods
A simple complete blood count (CBC) test is the most important diagnostic test: it should reveal a profound neutrophilia. FACS (Fluorescence activated cell sorter) analysis using specific monoclonal antibodies is essential for the diagnosis of both LAD I and LAD II. Adhesion assays are not performed in most laboratories and should be carried out only in laboratories which are specialized in these assays [21]. Mutation analysis of patients DNA should be carried out to confirm the diagnosis and for genetic counselling.