Nasopharyngeal cyst after adenoidectomy in a child with liver transplantation

Preoperative X-ray film of the lateral aspect of the neck showing hyperplastic adenoids.

Follicular hyperplasia. There is great range in the size of follicles, some being very large. Note the rim of dark-stained mantle zone lymphocytes surrounding the active germinal centers (H&E, 40×).;

Magnetic resonance imaging 6 months after the initial surgical procedure. Note the presence of a cystic mass in the nasopharynx.

Granulation tissue. Note the presence of numerous vessels embedded in a loose connective tissue matrix containing mesenchimal cells and occasional inflammatory cells (H&E, 100×).;