Endobronchial ultrasound-guided transbronchial needle aspiration in the diagnosis of lymphoma

Kennedy, M P; Jimenez, C A; Bruzzi, J F; Mhatre, A B; Lei, X; Giles, F J; Fanning, T; Morice, R C; Eapen, G A
April 2008
Thorax;Apr2008, Vol. 63 Issue 4, p360
Academic Journal
Background: The diagnostic accuracy of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) for the diagnosis of lymphoma in patients with mediastinal lymphadenopathy is not well defined. Methods: A retrospective review was performed of all patients with mediastinal lymphadenopathy referred for EBUS-TBNA between August 2005 and December 2006 in whom lymphoma was suspected based on prior history or clinical presentation. Mediastinal biopsy specimens were taken using a linear array ultrasonic bronchoscope (Olympus XBF-UC 160F) and a 22-gauge cytology needle (NA-202C Olympus) with on-site cytopathological support. The EBUS-TBNA result was compared with a reference standard of pathological tissue diagnosis or a composite of ⩾6 months of clinical follow-up with radiographic imaging. Results: Of 236 patients who underwent EBUS-TBNA, 25 were eligible for inclusion. Indications for EBUS-TBNA were suspected mediastinal recurrence of lymphoma (n = 13) and mediastinal lymphadenopathy of unknown cause (n = 12). Adequate lymph node sampling was accomplished in 24/25 patients (96%); there were no complications. EBUS-TBNA identified lymphoma in 10 patients and benign disease in 14 patients. There was one false negative EBUS-TBNA for lymphoma (lymphoma prevalence 11/25(44%)). Follow-up over a median of 10.5 months (range 1-19) confirmed stable or regressive lymphadenopathy in all 14 patients without a lymphoma diagnosis, consistent with a benign diagnosis. Overall, EBUS-TBNA had a sensitivity of 90.9%, specificity of 100%, positive predictive value of 100% and negative predictive value of 92.9% for the diagnosis of lymphoma. Conclusions: EBUS-TBNA is an accurate, safe and useful tool in the investigation of suspected lymphoma with isolated mediastinal adenopathy, and may diminish the need for more invasive procedures such as mediastinoscopy.


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