J Rheum Dis 2019; 26(2): 137-141  
A Case of Hepatic Inflammatory Pseudotumor Occurred in a Patient with Lupus Nephritis
Min Jung Kim1, Hyoungyoung Kim1, Yeo-Jin Song2, Soo-Kyung Cho1, Yoon-Kyoung Sung1
1Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, 2Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
Correspondence to: Yoon-Kyoung Sung http://orcid.org/0000-0001-6691-8939
Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea. E-mail:sungyk@hanyang.ac.kr
Received: July 23, 2018; Revised: October 7, 2018; Accepted: October 23, 2018; Published online: April 1, 2019.
© Korean College of Rheumatology. All rights reserved.

This is a open Access article, which permits unrestricted non-commerical use, distribution, and reproduction in any medium, provided the original work is properly cited.
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease affecting various organs. Among its manifestations, inflammatory pseudotumor (IPT) is an extremely rare disease about which no case has been reported of it occurring in the liver. We present a case of a SLE patient with hepatic IPT (hIPT) successfully treated with immunosuppressants. A 16-year-old male with elevated liver enzymes visited our clinic and was diagnosed as SLE. Although no lesion was observed in the initial abdomen ultrasonography, the abdominal CT on hospital day 7 revealed a new hepatic mass resembling an abscess. Despite 5 weeks of antibiotics treatment, the hepatic mass remained, and was re-diagnosed as hIPT secondary to SLE with an abdominal MRI. After high dose prednisolone and mycophenolate mofetil treatment, lupus activity subsided and hIPT disappeared in the follow- up CT. This case suggests that hIPT should be considered as a differential diagnosis among hepatic mass in SLE patients.
Keywords: Systemic lupus erythematosus, Liver neoplasm, Granuloma, Plasma cell

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