Salivary Gland Tumors

A 38-year-old woman undergoes ultrasound for a left submandibular gland mass. The ultrasound shows a hypoechoic lesion with indistinct margins and heterogeneous echotexture. FNAC is performed and shows malignant cells. Which investigation is most appropriate next to assess for perineural spread and determine surgical margins?

A 52-year-old woman presents with a 2-year history of a painless, slow-growing mass in the superficial lobe of the parotid gland. On examination, the overlying skin is intact, facial nerve function is normal, and the mass is mobile. Which histopathological feature best distinguishes this likely pleomorphic adenoma from an acinic cell carcinoma?

A 52-year-old man presents with a 3-month history of a painless swelling in the right parotid region. On examination, there is a firm, mobile mass approximately 2 cm in size. The overlying skin is normal. Which investigation is most appropriate to confirm the diagnosis and determine the nature of the lesion?

Which clinical feature best distinguishes pleomorphic adenoma from mucoepidermoid carcinoma of the parotid gland?

Which of the following salivary gland tumors has the highest malignant potential and is most commonly associated with facial nerve paralysis?