Periprosthetic seroma with false-positive FDG PET-CT reactive nodes mistaken for metastases in a patient previously treated of metastasic melanoma. Potential source of diagnostic errors

Alberto Gomez Portilla; Eleder Onaindia; Maitane Larrañaga; Eduardo López de Heredia; Victor Echenagusía

doi:10.1016/j.ijscr.2017.07.001

Periprosthetic seroma with false-positive FDG PET-CT reactive nodes mistaken for metastases in a patient previously treated of metastasic melanoma. Potential source of diagnostic errors

Int J Surg Case Rep. 2017:38:66-68. doi: 10.1016/j.ijscr.2017.07.001. Epub 2017 Jul 8.

Authors

Alberto Gomez Portilla¹, Eleder Onaindia², Maitane Larrañaga³, Eduardo López de Heredia⁴, Victor Echenagusía⁵

Affiliations

¹ Department of General Surgery and Digestive Diseases, University Hospital of Araba, Spain; University of the Basque Country, UPV, Spain. Electronic address: agomezpor@gmail.com.
² Department of Surgery, University of the Basque Country, UPV, Spain. Electronic address: eleder93@gmail.com.
³ Department of General Surgery and Digestive Diseases, University Hospital of Araba, Spain. Electronic address: maitanelz@hotmail.com.
⁴ Department of General Surgery and Digestive Diseases, University Hospital of Araba, Spain; University of the Basque Country, UPV, Spain. Electronic address: eduarmentia@gmail.com.
⁵ Department of General Surgery and Digestive Diseases, University Hospital of Araba, Spain. Electronic address: bittor_01@hotmail.com.

Abstract

FDG PET/CT is believed to be crucial in oncology, but its limited specificity represents a challenge. Prosthetic meshes used for repair abdominal defects may lead to false-positives FDG PET/CT uptake, over staging malignancies and inducing inappropriate treatments. A false-positive FDG PET/CT uptake mimicking metastatic disease during the follow-up of a previously treated metastatic melanoma patient is presented.