“…In LetterereSiwe disease, the infiltrate is composed largely of LCs with scattered lymphocytes, eosinophils, and occasional neutrophils (Fig 1, B and C ). 20 In Hand-Schuller-Christian disease, there is a prominent granulomatous reaction (made up of aggregates of histiocytes) and, rarely, cells with xanthomatous changes. 21 In eosinophilic granuloma and Hand-Schuller-Christian disease, clusters of eosinophils are prominent and there are occasional multinucleate giant cells.…”