Nasolacrimal duct cyst versus epidermal cyst: 1cm nodule on left nasal side wall. There is a well-defined ovoid T2 hyperintense and T1 hypointense non-enhancing lesion in the subcutaneous tissues of the left nasolabial fold that measures up to 9 mm. The lesion does not involve the nasolacrimal duct and the underlying bone is intact. There is a right tympanomastoid effusion. There is a small retention cyst in the left maxillary sinus. There appears to be a small right temporomandibular joint effusion and mild anterior subluxation of the mandibular condyle. The salivary glands are unremarkable. There is a defect in the left orbital floor with protrusion of orbital fat and mild deformity of the left inferior rectus muscle, likely secondary to prior trauma. The imaged intracranial structures are unremarkable.
1. A well-defined cystic lesion in the subcutaneous tissues of the left nasolabial fold that measures up to 9 mm likely represents an epidermal inclusion cyst. 2. Right tympanomastoid effusion.3. Small right temporomandibular joint effusion and mild anterior subluxation of the mandibular condyle, which may indicate temporomandibular joint dysfunction.