J Rheum Dis 2019; 26(4): 282-285  
A Rare Case of Overlap Syndrome with Diffuse Systemic Sclerosis, Rheumatoid Arthritis, and Cutaneous Sarcoidosis
Kyung Min Ko1, Su-Jin Moon1, Jung Hee Koh1, Jeana Kim2, Jun-Ki Min1
1Division of Rheumatology, Department of Internal Medicine, and 2Department of Pathology, Bucheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
Correspondence to: Jun-Ki Min http://orcid.org/0000-0003-0520-6086
Division of Rheumatology, Department of Internal Medicine, Bucheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 327 Sosa-ro, Wonmi-gu, Bucheon 14647, Korea. E-mail : min6403@catholic.ac.kr
Received: June 25, 2019; Revised: August 8, 2019; Accepted: August 27, 2019; Published online: October 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.
Abstract
Overlap syndrome is defined as a disease entity that satisfies the classification criteria of at least two connective tissue diseases occurring concurrently or separately in a single patient. Here, we report a rare case of a 59-year-old woman with diffuse systemic sclerosis with lung involvement–rheumatoid arthritis overlap syndrome accompanied by cutaneous sarcoidosis. Although there is no consensus for the optimal treatment of overlap syndrome to date, this case of co-existing rheumatoid arthritis and systemic sclerosis with interstitial lung disease successfully responded to abatacept.
Keywords: Undifferentiated connective tissue diseases, Systemic sclerosis, Rheumatoid arthritis, Sarcoidosis


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