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. The orbits and imaged intracranial structures are also 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.