Photoclinic Diagnosis: Dermoid Cyst of the Maxillary Sinus

The patient, a 13-year-old male, presented with the chief compliant of a mass in the lower aspect of his right orbit which had been present since his birth. On inspection, a large mass could be seen on the inferior part of the right eye that caused superior displacement of the right globe. He denied any history of acute or chronic sinusitis, paresthesia, swelling, or facial pain. Visual acuities of the right and left eye were 4/10 and 10/10, respectively. Refractive error on the right eye was -0.25+-9.0×15 ́; on the left eye, it was plano. A firm mass could be palpated in the upper part of maxillary area just inferior to the right globe. In the medial aspect, the inferior orbital rim could be palpated only with firm compression over the mass.