A 13-year-old female patient presents to your clinic for eva…

A 13-year-old female patient presents to your clinic for evaluation of this lesion (see radiograph). The teeth associated with the lesion appear to test vital. You perform an incisional biopsy and see these large cells (arrows) in a background of granulation tissue and hemorrhage (see histology). What is the most likely diagnosis?

This area on the buccal mucosa was discovered on routine ora…

This area on the buccal mucosa was discovered on routine oral exam in this patient.   A similar lesion was also present on the buccal mucosa of the other side of the mouth. On examination, the lesion disappears when you stretch the buccal mucosa. What is the most likely diagnosis?