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  • Title: Utility of EUS-guided biopsy of extramural pelvic masses.
    Author: Mohamadnejad M, Al-Haddad MA, Sherman S, McHenry L, Leblanc JK, DeWitt J.
    Journal: Gastrointest Endosc; 2012 Jan; 75(1):146-51. PubMed ID: 22018550.
    Abstract:
    BACKGROUND: The diagnostic utility of EUS-guided FNA (EUS-FNA) and EUS-guided Trucut biopsy (EUS-TCB) of pelvic masses has not been well described. OBJECTIVE: To evaluate the utility of EUS in the diagnosis of pelvic masses. DESIGN: Retrospective cohort study. SETTING: Single tertiary referral hospital in Indianapolis, Indiana. PATIENTS: Consecutive patients referred for EUS evaluation of pelvic mass from January 2002 to July 2009. Patients with newly diagnosed rectal cancer or a known/suspected intramural mass were excluded. INTERVENTIONS: EUS-FNA and/or EUS-TCB. MAIN OUTCOME MEASUREMENTS: Endosonographic features and cytological and pathological findings were evaluated. The final diagnosis was confirmed by surgical pathology or cytology and clinical follow-up. The sensitivities and specificities of EUS-TCB were calculated in a subset of patients with available surgical pathology. RESULTS: A total of 69 patients were identified, and 40 with intramural lesions (n = 36) or incomplete follow-up (n = 4) were excluded. The remaining 29 patients (15 men, mean age 58.5 ± 10.8 years) with pelvic masses (mean size 40.8 ± 20.1 mm) were evaluated. EUS-FNA or EUS-TCB helped to make the diagnosis in 25 of 29 patients (86%). Compared with surgical pathology (available in 17 patients), EUS-FNA had a sensitivity of 88% (95% CI, 53%-98%) and specificity of 100% (95% CI, 65%-100%) for malignancy. EUS-TCB alone had a sensitivity of 67% (95% CI, 21%-94%) and specificity of 100% (95% CI, 34%-100%) for malignancy, but the combination of EUS-FNA and EUS-TCB had a sensitivity of 100% (95% CI, 68%-100%) and a specificity of 100% (95% CI, 68%-100%). Complications after EUS-FNA included a pelvic abscess in 2 patients (7%) with a cystic pelvic mass. LIMITATION: Single-center study. CONCLUSION: EUS-FNA and EUS-TCB are sensitive for the diagnosis of malignancy in pelvic masses. Sampling of cystic masses in this region is discouraged.
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