Patient with cancer in remission, under chemo and radiation a year ago. Now presents with swelling and ulcerations in their mouth. What is the patient suffering from?

Correct answer: A. Mucositis

• A. Correct. Recurring oral swelling and ulcerations in a patient with a history of chemo/radiotherapy is consistent with mucositis (or its sequelae), the most directly fitting diagnosis among these options.
• B. Hyposmia (decreased smell) does not describe oral swelling/ulceration.
• C. Hyperosmia (increased smell sensitivity) does not describe oral swelling/ulceration.
• D. While candidiasis is a possible complication in this population, it presents more typically as white plaques/erythema rather than overt ulceration/swelling — mucositis is the better-fitting answer given the description.