title: Endoscopic ultrasound-guided fine needle aspiration for the diagnosis of nonfunctional paragangliomas: a case report and review of the literature.
abstract: Paraganglioma is a rare tumor that should be included in the differential diagnosis of retroperitoneal tumors. Endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) has emerged as an effective tool in the diagnosis of these lesions. A 37-year-old female patient with a history of microcytic anemia underwent EUS-FNA and was diagnosed with a neuroendocrine tumor by histopathological and immunohistochemical analysis. The tumor was surgically removed, and the final diagnosis was paraganglioma. This case report emphasizes the importance of EUS in the evaluation of this type of lesion.
authors.affiliation: Santa Casa Medical School, Sao Paulo, Brazil.
authors.forename: Ricardo L
authors.initials: RL
authors.lastname: Ganc
authors.affiliation: Santa Casa Medical School, Sao Paulo, Brazil.
authors.forename: Ana Carolina F
authors.initials: AC
authors.lastname: Castro
authors.affiliation: Santa Casa Medical School, Sao Paulo, Brazil.
authors.forename: Rogerio
authors.initials: R
authors.lastname: Colaiacovo
authors.affiliation: Santa Casa Medical School, Sao Paulo, Brazil.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Vigil
authors.affiliation: Santa Casa Medical School, Sao Paulo, Brazil.
authors.forename: Lucio G B
authors.initials: LG
authors.lastname: Rossini
authors.affiliation: Santa Casa Medical School, Sao Paulo, Brazil.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Altenfelder
keywords: endoscopic ultrasound; fine needle aspiration; immunohistochemstry; neuroendocrine tumor; pancreas; paraganglioma