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Case Report
A Case of Pediatric Unprovoked Deep Vein Thrombosis due to Combined Hereditary Thrombophilia of Antithrombin III and Protein S Deficiency
Clin Pediatr Hematol Oncol 2018;25:185-90.
Published online October 31, 2018
© 2018 Korean Society of Pediatric Hematology-Oncology and Korean Society for Pediatric Neuro-Oncology

Jeong Yeon Kim, M.D.1, I-Seok Kang, M.D.1 and Hee-Jin Kim, M.D., Ph.D.2

Departments of 1Pediatrics and 2Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
Correspondence to: I-Seok Kang
Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 06351, Korea
Tel: +82-2-3410-3531
Fax: +82-2-3410-0043
E-mail: kis4298@gmail.com
ORCID ID: orcid.org/0000-0003-4264-0826
Received September 4, 2018; Revised September 26, 2018; Accepted October 5, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Unprovoked deep vein thrombosis (DVT) is uncommon in pediatric patients and, among those, combined hereditary thrombophilia is particularly rare. We present a 9-year-old Korean boy who developed lower extremity pain with swelling, and was diagnosed with unprovoked DVT due to hereditary (combined hereditary thrombophilia). Coagulation test revealed antithrombin III and protein S deficiency. The genetic work up confirmed the first case of combined antithrombin III deficiency and protein S deficiency by SERPINC1 heterozygous termination mutation [c.685C>T (p.Arg229*)] and PROS1 heterozygous missense mutation [c.1597G>A (p.Val533Met)]. He was treated with continuous heparin and catheter intervention but those were ineffective or transiently effective. His DVT gradually improved only after prolonged anticoagulation.
Keywords: Deep vein thrombosis, Hereditary thrombophilia, Pediatric, Anticoagulation
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October 2018, 25 (2)
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  • I-Seok Kang