[Isolated ankylosis of the malleus].

Certain cases of apparently isolated conductive deafness, the etiology of which remains uncertain after clinical examination and impedance measurement, can be found in younger patients and adults. Surgical exploration is necessary: this involves, first of all, an inspection of the anatomy of the ossicles and then precise study of their mobility at the level of the tympanic cavity and attic. Various forms of malleus ankylosis, due to blockage or malformation, are presented. Ossiculoplasty gives good auditory results.