After local anaesthesia, a horizontal incision was made in the free gingiva for a distance of approximately 2 cm over the zygomatic buttress extending through the mucosa, submucosa, and any buccinator muscle fibers (Figure-2A).
The buccinator muscle, pterygomandibular raphe, and retromolar trigone are well delineated with cheek distension, and the location of a tumor on the buccal mucosa or gingival mucosa is clearly identified.
The main mass of the BFP occupies the buccal space bound medially by the buccinator muscle and laterally by the masseter muscle, and rests on the periosteum that covers the posterior buccal aspect of the maxilla.
Posteromedially, at the level of the hard palate (the superior aspect of the buccal space), the superficial layer of the deep cervical fascia (SLDCF) extending between the masseter and the buccinator muscle is incomplete, allowing spread of pathology between the buccal space and the masticator space.
It has a main excretory duct, the (Stenon or Stensen) parotid duct, which leaves the anterior border of the PG, passes in front of the masseter muscle, penetrates the buccinator muscle, and finally opens into the oral cavity at the level of the second upper molar (Standring, 2015).