Parapharyngeal lymph node XXXX : an unusual presentation of @entity3557 .

@entity1 @entity3557 @entity706 @entity5 @entity1376 @entity3
BACKGROUND: Parapharyngeal space nodal @entity3 are usually secondary to @entity5 of the pharynx and sinonasal tract, although localization of @entity706 is also possible. Parapharyngeal @entity3 arising from @entity3557 are instead an exceedingly rare event, with only 10 cases reported up to now in the literature. METHODS: We describe two cases of parapharyngeal @entity3 from @entity3557 in a @entity1 and a @entity1 , aged 40 and 52 years, respectively. RESULTS: Both @entity1 had a lesion that clinically appeared to be located in the parapharyngeal space; they underwent CT and MRI, which detected a cystic mass in the poststyloid compartment. In the first @entity1 , fine-needle aspiration cytology failed in identifying the histologic nature of the lesion, which was excised through a transcervical approach. A diagnosis of @entity3557 was rendered and therefore the @entity1 underwent total thyroidectomy. In the second @entity1 , a total thyroidectomy, previously scheduled for @entity1376 , was performed along with the removal of the parapharyngeal mass. Definitive histologic findings revealed that the two parapharyngeal masses were cystic @entity3 from a @entity3557 . Both @entity1 received postoperative 131I treatment. Twenty-four months after surgery, the first @entity1 is free of disease, whereas the second one has clear signs of abnormal 131I uptake in the lungs. CONCLUSIONS: The differential diagnosis of a parapharyngeal poststyloid mass should also include @entity3 from @entity3557 . When the lesion displays a cystic appearance on imaging, it is advisable to rule out a thyroid primary by ultrasonographic examination. The occurrence of a @entity3 in such unusual site, even though rarely reported, does not seem to significantly affect the prognosis of the disease.
