Classic symptoms: ptosis, swelling, fever. What could this be?

Correct answer: A. Cavernous sinus thrombophlebitis (thrombosis)

• A. Correct. Cavernous sinus thrombosis classically presents with periorbital swelling, ptosis, cranial nerve palsies, fever, and is a serious complication that can arise from spreading odontogenic infection.
• B. Bell's palsy presents with unilateral facial paralysis, not the fever/swelling/ptosis triad.
• C. Trigeminal neuralgia presents with sharp facial pain, not these systemic/orbital signs.
• D. Ludwig's angina presents with bilateral submandibular/sublingual swelling and airway compromise, not specifically ptosis.