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Pecoma of the lung: a benign tumor with extensive ¹⁸F-2-deoxy-D-glucose uptake

^a Department of Thoracic Surgery, 251 General Hospital of the Hellenic Air Force, Athens, Greece
^b Department Pathology, University Ulm, Ulm, Germany
^c Clinic of Thoracic and Vascular Surgery, University Ulm, Ulm, Germany
^d Department Nuclear Medicine, University Ulm, Ulm, Germany

*Corresponding author. Universitätsklinik für Thorax- und Gefässchirurgie, Universität Ulm, Steinhövelstrasse 9, 89075 Ulm, Germany. Tel.: +49 731/500-27301; fax: +49 731/500-27289.

E-mail address: hubert.schelzig{at}medizin.uni-ulm.de (H. Schelzig).

A case of lung pecoma (i.e. tumors showing perivascular epithelioid cell differentiation) with extensive ¹⁸F-2-deoxy-D-glucose (FDG) uptake in PET/CT study is reported. Pecomas of the lung – which include the better known clear cell ‘sugar’ tumor – are a subset of extremely rare lung tumors which usually react positively to both melanocytic and smooth muscle markers. Although widely presumed as benign in computed tomography (CT) and positron emission tomography (PET)/CT studies they depict as malignant, thus complicating the preoperative diagnosis. A subset of pecomas could conceal a malignant potential.

Key Words: Lung tumor; Positron emission tomography