Preoperative identification of the internal opening with the modified Killian's method in a case of pyriform sinus fistula.

Pyriform sinus fistula is a rare branchial pouch anomaly, which causes recurrent neck abscess. Although complete excision of the fistula tract is considered as a definitive treatment for pyriform sinus fistula, it has been suggested that chemocauterization with trichloroacetic acid (TCA) of the internal opening is a reasonable treatment. For this purpose identifying the existence of an internal opening is important.

Sonographically guided core biopsy of the salivary gland masses: safety and efficacy.

Over an 8-year period, we performed ultrasonography (US)-guided core biopsy of the salivary gland in 37 patients using an 1l-mm-throw 18-gauge automated biopsy system. The biopsy results were retrospectively compared with the findings of surgical pathology (n=18) or more than 6 months of clinical follow-up (n=19). The sensitivity, specificity, and accuracy of US-guided core biopsy for the diagnosis of malignancy were 75.