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Click Initial contrast enhanced axial Computed Tomography - 100 cc of Omnipaque-300 (KVp 120, mA 20 * 3572ms). 44-year-old female with plunging ranula - Superior aspect of the lesion - Shows a non-enhancing, water-density mass from the right sublingual space displacing the tongue to the left. A large component of the mass extends posterolaterally into the submandibular space. Mass effect can be appreciated with displacement of the parapharyngeal and mucosal pharyngeal spaces. The lesion measures 6.7 x 2.2 x 4.5 cm and is of water-density. It is non-enhancing, homogenous, smoothly-marginated, and without internal septations. Smooth tapering anteriorly into the sublingual space, forming the ``tail sign,`` is seen, but better appreciated on stack images.

Click Initial contrast enhanced axial Computed Tomography - 100 cc of Omnipaque-300 (KVp 120, mA 20 * 3572ms). 44-year-old female with plunging ranula - Superior aspect of the lesion - Shows a non-enhancing, water-density mass from the right sublingual space displacing the tongue to the left. A large component of the mass extends posterolaterally into the submandibular space. Mass effect can be appreciated with displacement of the parapharyngeal and mucosal pharyngeal spaces. The lesion measures 6.7 x 2.2 x 4.5 cm and is of water-density. It is non-enhancing, homogenous, smoothly-marginated, and without internal septations. Smooth tapering anteriorly into the sublingual space, forming the ``tail sign,`` is seen, but better appreciated on stack images.

Click Initial contrast enhanced axial Computed Tomography - 100 cc of Omnipaque-300 (KVp 120, mA 20 * 3572ms). 44-year-old female with plunging ranula - Superior aspect of the lesion - Shows a non-enhancing, water-density mass from the right sublingual space displacing the tongue to the left. A large component of the mass extends posterolaterally into the submandibular space. Mass effect can be appreciated with displacement of the parapharyngeal and mucosal pharyngeal spaces. The lesion measures 6.7 x 2.2 x 4.5 cm and is of water-density. It is non-enhancing, homogenous, smoothly-marginated, and without internal septations. Smooth tapering anteriorly into the sublingual space, forming the ``tail sign,`` is seen, but better appreciated on stack images.

Click Follow-up contrast enhanced axial Computed Tomography performed 2 months later - 80 cc of Omnipaque-300 (KVp 120, mA 20 * 3575 ms) 44-year-old female with infected plunging ranula. Superior aspect of the lesion. The mass has unchanged anatomic relationships, but has slightly enlarged and now measures 6.9 x 3.7 x 4.0 cm. It remains homogenous, smoothly-marginated, and without internal septations. Thick rim-enhancement is now seen, consistent with secondary infection. Mass effect with tracheal deviation and compression is worse and there is new right submandibular and cervical reactive lymphadenopathy. The mass was surgically excised and pathologically proven to be a plunging ranula.

Click Follow-up contrast enhanced axial Computed Tomography performed 2 months later - 80 cc of Omnipaque-300 (KVp 120, mA 20 * 3575 ms) 44-year-old female with infected plunging ranula. Superior aspect of the lesion. The mass has unchanged anatomic relationships, but has slightly enlarged and now measures 6.9 x 3.7 x 4.0 cm. It remains homogenous, smoothly-marginated, and without internal septations. Thick rim-enhancement is now seen, consistent with secondary infection. Mass effect with tracheal deviation and compression is worse and there is new right submandibular and cervical reactive lymphadenopathy. The mass was surgically excised and pathologically proven to be a plunging ranula.

Click Follow-up contrast enhanced axial Computed Tomography performed 2 months later - 80 cc of Omnipaque-300 (KVp 120, mA 20 * 3575 ms) 44-year-old female with infected plunging ranula. Superior aspect of the lesion. The mass has unchanged anatomic relationships, but has slightly enlarged and now measures 6.9 x 3.7 x 4.0 cm. It remains homogenous, smoothly-marginated, and without internal septations. Thick rim-enhancement is now seen, consistent with secondary infection. Mass effect with tracheal deviation and compression is worse and there is new right submandibular and cervical reactive lymphadenopathy. The mass was surgically excised and pathologically proven to be a plunging ranula.