LAUSR

430 Splenosis is an acquired condition defined as seed‐ ing and autotransplantation of splenic tissue fol‐ lowing splenic trauma or splenectomy. It should be distinguished from the accessory spleen.1 Al‐ though it is usually benign, correct identification is essential because misdiagnosis can have a sig‐ nificant impact on patient management. An asymptomatic 48 ‐year ‐old man after trans‐ plantation was admitted for routine checkup. He had a history of hepatocellular carcinoma asso‐ ciated with hepatitis B cirrhosis and hypersplen‐ ism, which had been treated by liver transplan‐ tation and splenectomy 6 years earlier. The level of α ‐fetoprotein was slightly elevated (32 μg/l). Abdominal ultrasonography revealed a 2.3 ‐cm, well ‐circumscribed intra ‐abdominal hypoechoic mass. Considering the possibility of a metastatic lesion, a fluoro ‐18 ‐deoxyglucose (18F ‐FDG) pos‐ itron emission tomography (PET) coregistered with a computed tomography (CT) scan was per‐ formed. It demonstrated a lesion in the lower ab‐ domen (FIGURE 1A), located in the greater omen‐ tum. It showed central calcification on CT and the corresponding fused images (FIGURES 1B and 1C), with a moderate 18F ‐FDG uptake in relation to the lesion (maximum standardized uptake value, 3.88). No other abnormal distribution of 18F ‐FDG was shown. Accordingly, the biopsy of the mass CLINICAL IMAGE