Fig. 3
From: Difficult and complicated oral ulceration: an expert consensus guideline for diagnosis
A 22-year-old man with oral ulcers for 3 days. Widespread necrotic ulcers on the left maxillary gingiva, extending to the hard palate, with smooth and thick yellowish-white pseudomembrane. Full blood count showed the percentage of neutrophilic segmented granulocytes decreased significantly (2.0%). Then the bone marrow biopsy and immunotyping revealed acute monocytic leukemia, type M5
