"tympanic membrane changes: thickening, retraction, tympanic membrane perforation or calcification (myringosclerosis)"
"mastoid process changes: underdeveloped pneumatisation, sclerosis or opacification"
"Patients typically present with conductive hearing loss, chronic pain, otorrhoea and vertigo."
"mastoid process changes: underdeveloped pneumatisation, sclerosis or opacification"