A 34-year-old male comes to the dentist because of a 1-year history of swelling in the right upper jaw. On intraoral examination, a single diffuse 2х1.5 cm swelling is seen on the right side of anterior maxilla. A biopsy specimen of the lesion shows numerous thinwalled sinusoids in the connective tissue, hemosiderin deposition, and numerous giant cells in a hemorrhagic background. Which of the following is the most likely diagnosis?