BACKGROUND AND OBJECTIVES: @entity1 presenting with @entity774 require workup with @entity5733 or metabolite measurements to rule out @entity1911 . There is a select portion of @entity1 with marker negative @entity1911 . The aim of this study is to compare @entity1 characteristics and presentations between marker positive and marker negative @entity5 . METHODS: We performed an IRB-approved retrospective chart review of 88 cases of @entity1911 excised at our institution from 1995 to 2013. We considered any abnormal elevation in diagnostic test to be marker-positive. RESULTS: Seventy-eight cases had laboratory results available. Among these, seven had no elevations in laboratory testing. There was no difference in age or @entity5 size, but marker-negative @entity1 had higher BMI than marker-positive @entity1 . Marker negative @entity1 were more likely to present with vertigo/ @entity1296 (P   =   0.003). Neither was more likely to have a @entity74 associated with risk of @entity1911 . CONCLUSIONS: Marker-negative @entity1911 is uncommon, representing 9% of cases in our series. Of @entity1 with @entity774 or presentation suggesting @entity5733 excess with normal labs, those with vertigo/ @entity1296 may warrant a @entity7990 scan or repeat testing to avoid missing @entity1911 . Clinicians may need a high degree of suspicion for @entity1911 in @entity1 with negative testing and elevated BMI. J. Surg. Oncol. 2015; 112:492-495.    2015 Wiley Periodicals, Inc.

XXXX diagnosed pathologically with previous negative serum markers.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'patient'] @entity5733 :: ('D002395', 'Chemical') :: ['catecholamine'] @entity1911 :: ('MESH:D010673', 'Disease') :: ['pheochromocytoma'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'tumors'] @entity7990 :: ('MESH:D019797', 'Chemical') :: ['metaiodobenzylguanidine'] @entity74 :: ('MESH:D030342', 'Disease') :: ['genetic syndrome'] @entity1296 :: ('MESH:D004244', 'Disease') :: ['dizziness'] @entity774 :: ('MESH:D000312', 'Disease') :: ['adrenal masses']
@entity1911 :: (MESH:D010673,Disease) :: ['Pheochromocytoma']
