Antroscleroma.

Oedema, hypertrophy, polyposis, atrophy or empyema of the maxillary sinus are common features of rhinoscleroma. However, actual involvement of the antrum by the nasal granuloma is rare and primary scleroma of the antrum is of extreme rarity. Three cases of antroscleroma are presented, one secondary to an extensive rhinoscleroma and two primary. The difference in the physical, biological and microbiological environment in the antrum from that in the nose might explain the rarity of antroscleroma.