[Enchondroma of the mastoid secondary to generalised enchondromatosis].

Please cite this article as: León FM, Gómez Quiroz C, Zernotti ME. Encondroma de mastoides secundario a encondromatosis generalizada. Acta Otorrinolaringol Esp. 2014;65:271--272. ∗ Corresponding author. E-mail address: [email protected] (M.E. Zernotti). generalised chondromatosis (Fig. 1). The patient’s right leg had been amputated as an infant. Physical examination revealed deformity of right skull with tumefaction of the ear lobe and retroauricular area, with marked mastoid hyperesthesia. The tympanic membrane could not be seen due to oedema of the external auditory canal. Computed tomography was performed (Fig. 2), revealing severe dysplastic changes (compatible with chondromatosis) in right temporal and sphenoid bones, with involvement and occupation of tympanic cavity. Because of the history of chondromatosis and the tomography results, scintigraphy and magnetic resonance were requested (Fig. 3). Results showed active lesions and deformity (probably from osteochondroma) in the stage of becoming malignant, located in