Fig. 1

Displays an ulcer located on the lower lip. A The ulcer after 5 days of neutropenia with a pseudo-fibrinous membrane and an erythematous halo. The ulcer appears nonhemorrhagic, painless, and measures approximately 1.5 cm × 1 cm in size. B The ulcer on the lower lip after 12 days of neutropenia. There is evident growth in the size of the ulcer and the presence of necrotic tissue. C Reduction in the size of the ulcer on the lower lip, taken 7 days after initiating the topical treatment