[Rare diseases of the ear: fibrous dysplasia of the tympanic bone, extensive papillomatosis, ceruminoma, aspergilloma, spontaneous évidement of the tympanic bone].

The authors report six cases of rare ear diseases: fibrous dysplasia of the tympanum mimicking an partially obstructive osteoma of the external auditory canal. The authors draw a parallel between the rarity of these monostotic forms of the temporal bone which are strictly localised to a single region (tympanum-mastoid-atrium) and the diffuse forms which involve several regions at the same time; extensive papillomatosis of the external and middle ear, a rare condition with serious repercussions; two ceruminomas with very different clinical presentations and outcomes; an atrial pseudo-tumoral aspergilloma which was easily excised ans repaired with a myringoplasty with a good long term result; hypoplasia of the tympanum, which constituted a spontaneous évidement, discovered at operation for an attic cholesteatoma. This finding was sufficiently unusual to warrant reporting.