Evaluating for a predisposing cause (such as eosinophilic esophagitis EoE, stricture, Schatzki ring) after 2-4 weeks is important to prevent recurrence, as most food impaction cases occur on background of stricture or chronic inflammation | Option A (chest X-ray) is not routinely necessary; Option B (CBC) is irrelevant to follow-up; Option D (liquid diet) is excessive; Option E (allergy testing) may be helpful but is not the priority | Consultation with a gastroenterologist is necessary after 2-4 weeks to perform follow-up endoscopy and assess mucosa, and take biopsies if needed to rule out EoE or stricture | History of recurrent impaction or chronic dysphagia changes the answer toward earlier evaluation (within one week) not after 2-4 weeks | After foreign body removal, search for: (1) EoE (concentric rings, pale mucosa), (2) peptic stricture, (3) Schatzki ring, (4) tumor | Sources: Scott Browns Otorhinolaryngology 8th edition volume 1.pdf — p. 505; CUMMINGS OTOLARYNGOLOGY–HEAD AND NECK 7th Ed p1.pdf — p. 50