Ureteral Metastasis From an Appendiceal Carcinoma and Diagnosis by Endoscopic Ultrasound-Guided Fine-Needle Aspiration

Abstract

Endoscopic ultrasound (EUS) is a standard tool for imaging the gastrointestinal tract and adjacent structures. EUS-guided fine-needle aspiration (FNA) allows the endosonographer easy access to these structures for both diagnostic and therapeutic purposes. We describe a case of metastatic lesion, adherent to a stented right ureter, which was imaged with transrectal EUS, with successful cytologic identification after EUS-guided FNA. EUS and EUS-guided FNA can be valuable tools in the evaluation of some soft-tissue abnormalities of the pelvis.

Review of endoscopic ultrasound‐guided fine‐needle aspiration cytology

“…Extrarectal lesions, including primary and secondary malignancies, and benign conditions of the pelvic cavity are amenable for evaluation by EUS-FNA and core biopsies. 279,280 In a histologic study, transrectal EUS-guided core biopsies of pelvic tumors had a sensitivity of 88%, specificity of 100%, positive predictive value of 100%, and negative predictive value of 89%. Sufficient tissue was obtained for tissue examination in all cases and apart from one postbiopsy hemorrhage, which was managed conservatively, no other complications were encountered.…”

Utility of EUS-guided biopsy of extramural pelvic masses

“…6 EUS is a potentially useful modality to diagnose pelvic lesions in close proximity to the rectosigmoid colon. Although a few case reports have described the use of EUS or EUS-guided FNA (EUS-FNA) in the diagnosis of pelvic lesions, 1,2,[7][8][9] there have been few larger studies evaluating the role of EUS in these patients. 10,11 Furthermore, the accuracies of EUS-FNA and EUS-guided Tru-cut biopsy (EUS-TCB) in pelvic masses have not been described.…”