Case 375: Echinococcosis, alveolar
55 year-old man from Switzerland with right upper quadrant pain, fever, and unintentional weight loss for 2 months.
CT: Calcifications, with peritoneal and pleural manifestation
CT demonstrates a well, but irregularly defined mass in the right lobe with nodular margins and a right lateral curvilinear calcification. No contrast enhancement within or surrounding the mass. Note capsular involvement anteriorly and pleural thickening posteriorly.
PET-CT demonstrates no FDG-avidity of the mass, but mild FDG-avidity of the pleura.
Ultrasound guided biopsy of the mass revealed active alveolar echinococcosis, which had infested the peritoneum, diaphragm and right pleura.