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Pulmonary amoebiasis presenting as superior vena cava syndrome

¹ Department of Medicine, São Paulo University Medical School, São Paulo, Brazil
² Department of Pathology, São Paulo University Medical School, São Paulo, Brazil
³ Division of Parasitic Diseases, National Centers for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
⁴ Department of Thoracic Surgery, São Paulo University Medical School, São Paulo, Brazil

Correspondence to:
Correspondence to:
Dr T Mauad
Department of Pathology, Faculdade de Medicina da Universidade de Sao Paulo, Av. Dr. Arnaldo 455 1st floor, 01246-903 São Paulo SP, Brazil; tmauad{at}usp.br

Pulmonary amoebiasis without liver involvement occurs sporadically as a result of haematogenous spread from a primary site, the colon. The case history is presented of a patient who developed superior vena cava syndrome due to a pulmonary amoebic abscess without liver involvement. He was initially suspected of having a neoplasm but a combination of tests including histological examination of the H&E stained excised tissue, immunofluorescence using anti-Entamoeba histolytica antibodies, and serology confirmed the diagnosis of amoebiasis. To our knowledge this is the first description of pulmonary amoebiasis presenting as superior vena cava syndrome.

Keywords: lung abscess; Entamoeba histolytica; superior vena cava syndrome

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