Deep Neck Space Infections

A 28-year-old man from rural Maharashtra presents with a 5-day history of severe left-sided neck pain, dysphagia, and fever (38.5°C). On examination, he has trismus, left intraoral swelling pushing the soft palate medially, and a palpable firm mass in the left lateral pharyngeal wall. Neck movements are restricted. Laboratory studies show WBC 14,200/μL with left shift. CT neck with contrast reveals a 4 cm hypodense collection in the left lateral pharyngeal space with rim enhancement. What is the most likely diagnosis?

A 35-year-old woman from Delhi presents with a 3-day history of severe neck pain, fever (39.2°C), and progressive dysphagia. She reports a sore throat 1 week prior. On examination, she has a stiff neck, limited neck flexion, and bilateral neck swelling. Intraorally, the posterior pharyngeal wall appears bulged and erythematous. Neck X-ray shows widening of the prevertebral space (>6 mm at C3 level). Blood cultures are pending. What is the most appropriate next step in management?