<prompt> Which of these pathologies is the most common benign tumour of the parotid gland?MumpsTBHeerfordt syndromePleomorphic adenoma  <response>: Mumps causes the classic bilateral parotitis, but it can present as a unilateral enlargement in rare cases. Heerfordt syndrome includes sarcoidosis.Tuberculosis historically was associated with cold abscess. It is caused by Mycobacterium tuberculosis, an acid-fast bacterium that does not stain with Gram stain. It requires ZiehlNeelsen staining. 