Acute superficial ulcer的用法和样例：
- FAC usually shows multiple sites of necrosis and perforation of the colon, ranging from superficial ulcer, flask-shaped ulcer to transmural necrosis.
- An acute superficial methicillin-resistant Staphylococcus aureus infection occurred post-operatively and required a 5 week regimen of vancomycin.
- The primary lesions consist of purpuric papules which undergo superficial ulceration, followed by the development of irregular atrophic scars.
- He eats only bland food because of his ulcer.