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Arch Otolaryngol Head Neck Surg. 2006;132:105-106.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Diagnosis: Cystic schwannoma of the lingual nerve

Most cystic lesions of the floor of the mouth are of salivary origin, with ranulas and mucoceles being the most common. The following heterogeneous group of other masses may have a similar appearance on imaging: dermoid cysts (a term that includes dermoid, epidermoid, and teratoid cysts), infectious processes, and benign neoplasms, mainly of salivary and neural origin.¹ Diagnosis is based on the findings of ultrasound, with or without fine-needle aspiration cytology, and possibly on those of computed tomography (CT) or MRI.

Ranulas are homogeneously anechoic on ultrasound images, hypodense on CT scans, hyperintense on T2-weighted MRIs, and hypointense on T1-weighted MRIs. Because they lack an epithelial lining, no enhancement would be expected after contrast administration. The lesion almost invariably occurs off the midline; it may extend posteriorly from its site of origin within the sublingual gland into the submandibular space (plunging ranula). Salivary gland mucoceles may result from traumatic injury . . . [Full Text of this Article]

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Arch Otolaryngol Head Neck Surg. 2006;132(1):103.
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