title: Von-Willebrand disease presenting as intractable epistaxis after nasal polypectomy.
abstract: Von-Willebrand disease (VWD) is one of the platelet dysfunction disorders that results from a deficiency of Von-Willebrand factor, which is essential for hemostasis. VWD patients typically have normal laboratory results on screening for bleeding disorders. To suspect and diagnose VWD, a careful review of past medical history and laboratory tests is critical. A 59-year-old male patient presented with intractable nasal bleeding after nasal polypectomy. The bleeding was controlled by platelet transfusion, and he was later diagnosed with VWD.
authors.affiliation: Department of Otorhinolaryngology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemoon-gu, Seoul 120-752, Republic of Korea.
authors.forename: Jeong Jin
authors.initials: JJ
authors.lastname: Park
authors.affiliation: Department of Otorhinolaryngology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemoon-gu, Seoul 120-752, Republic of Korea ; The Airway Mucus Institute, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea.
authors.forename: Chang-Hoon
authors.initials: CH
authors.lastname: Kim
authors.affiliation: Department of Otorhinolaryngology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemoon-gu, Seoul 120-752, Republic of Korea.
authors.forename: Jeung-Gweon
authors.initials: JG
authors.lastname: Lee
authors.affiliation: Department of Otorhinolaryngology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemoon-gu, Seoul 120-752, Republic of Korea ; The Airway Mucus Institute, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea.
authors.forename: Hyung-Ju
authors.identifier: 0000-0002-2851-3225
authors.initials: HJ
authors.lastname: Cho