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Published online by Cambridge University Press: 16 October 2009
What is the surface marking of the parotid gland?
The superior margin can be marked on the side of the face by a curved line starting at the tragus of the ear running to the middle of the cheek, just below the zygomatic arch. From here a curved line drawn down to the angle of mandible marks the anterior border. The inferior border is between the angle of the mandible and the mastoid process.
What different types of parotidectomy do you know? When are they performed?
A parotidectomy is performed to excise a tumour of the parotid gland. A superficial parotidectomy is undertaken either as a primary diagnostic procedure or as a curative procedure when only the superficial lobe is involved in small and low-grade tumours. In cases where the deep lobe is also involved and/or the tumour is known to be malignant a conservative total parotidectomy must be performed. This refers to the excision of the entire gland with conservation of the facial nerve. Radical parotidectomy with excision of the nerve is undertaken in cases of adherent or infiltrative disease.
What pre-operative considerations may be undertaken prior to a parotidectomy?
Clinical assessment of the facial nerve to identify any pre-operative functional deficit
Local examination and imaging to identify involved lymph nodes
CT or MRI scanning to assess the deep lobe.
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