The Rare Case of an Adult-Onset Xanthogranuloma of the Paranasal Sinuses: A Histological Dilemma

Table 1

WHO classification of histiocytic disorders (adapted from Favara et al.).

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Class 1: dendritic cell histiocytoses

Langerhans cell histiocytosis
Erdheim-Chester disease
Juvenile xanthogranuloma

Class 2: nondendritic cell histiocytoses

Rosai-Dorfmann disease
Reticulohistiocytoma

Class 3: malignant histiocytoses

Acute monocytic leukaemia
Malignant histiocytosis
True histiocytic lymphoma

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