What causes cholesteatoma? A cholesteatoma usually occurs because of poor eustachian tube function in conjunction with infection in the middle ear. Negative pressure within the middle ear pulls a part of the eardrum the wrong way, creating a sac or cyst that fills with old skin cells and other waste material. As the cyst gets bigger, some of the middle ear bones break down, affecting hearing. A rare congenital form of cholesteatoma (one present at birth) can occur in the middle ear and elsewhere, such as in the nearby skull bones.
What causes Cholesteatoma ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What causes Cholesteatoma ? [/INST] \n What causes cholesteatoma? A cholesteatoma usually occurs because of poor eustachian tube function in conjunction with infection in the middle ear. Negative pressure within the middle ear pulls a part of the eardrum the wrong way, creating a sac or cyst that fills with old skin cells and other waste material. As the cyst gets bigger, some of the middle ear bones break down, affecting hearing. A rare congenital form of cholesteatoma (one present at birth) can occur in the middle ear and elsewhere, such as in the nearby skull bones.</s>