PMID- 24461090 OWN - NLM STAT- MEDLINE DCOM- 20141124 LR - 20181203 IS - 0151-9638 (Print) IS - 0151-9638 (Linking) VI - 141 IP - 1 DP - 2014 Jan TI - [A study of 19 cases of allergy to heparins with positive skin testing]. PG - 23-9 LID - S0151-9638(13)01697-9 [pii] LID - 10.1016/j.annder.2013.10.040 [doi] AB - BACKGROUND: Allergic hypersensitivity to unfractioned or low-molecular-weight heparins is uncommon but is known, and in particular the most common form is localized dermatitis, although such cases have seldom turned into maculopapular exanthema. Since cross-reactions with other heparins are frequent, identification of therapeutic alternatives is essential. PATIENTS AND METHODS: This retrospective study included patients referred to the Department of Dermatology and Allergology at Tenon Hospital between 2000 and 2012 with suspicion of allergy to unfractionated heparin (UFH) or low-molecular-weight heparin (LMWH) and sensitized to at least one heparin (i.e. positive skin tests to at least one heparin). The heparins and hirudins used were tested in the forearm by means of intradermal skin tests. All patients were contacted in 2012 to establish whether they had used some form of heparin since the cutaneous allergy tests. RESULTS: Nineteen patients had at least one positive skin test for heparin; 1 patient had presented anaphylactic shock, while 18 others had presented localized eczema (12) or generalized dermatitis (6). The heparin most often responsible for these adverse reactions was enoxaparin (13/19). An LMWH was responsible in most cases (18 vs. 1 with UFH). Of these 18 patients, 16 also presented positive skin tests for UFH, 9 for synthetic heparinoid and 1 for hirudin. 11/19 patients were tested for fondaparinux (a synthetic pentasaccharid) and all had negative skin tests. 5/7 patients with negative skin tests had taken fondaparinux without any visible reaction, whereas 2 who also tested negative experienced localized eruption at the injection site. DISCUSSION: Our results underline the greater frequency of delayed hypersensitivity reactions compared with immediate reactions to heparins. Skin tests can help to identify substitution molecules. Fondaparinux might be an alternative but certain diagnosis relies on rechallenge. CI - Copyright (c) 2013 Elsevier Masson SAS. All rights reserved. FAU - Phan, C AU - Phan C AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. Electronic address: cel.phan@gmail.com. FAU - Vial-Dupuy, A AU - Vial-Dupuy A AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. FAU - Autegarden, J-E AU - Autegarden JE AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. FAU - Amsler, E AU - Amsler E AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. FAU - Gaouar, H AU - Gaouar H AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. FAU - Abuaf, N AU - Abuaf N AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. FAU - Pecquet, C AU - Pecquet C AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. FAU - Frances, C AU - Frances C AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. FAU - Soria, A AU - Soria A AD - Service de dermatologie et allergologie, hopital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. LA - fre PT - Journal Article TT - Etude de 19 cas d'allergie aux heparines prouvee par des tests cutanes. DEP - 20131202 PL - France TA - Ann Dermatol Venereol JT - Annales de dermatologie et de venereologie JID - 7702013 RN - 0 (Anticoagulants) RN - 0 (Heparin, Low-Molecular-Weight) RN - 0 (Heparinoids) RN - 0 (Hirudins) RN - 0 (Polysaccharides) RN - 9005-49-6 (Heparin) RN - J177FOW5JL (Fondaparinux) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Anaphylaxis/diagnosis/etiology MH - Anticoagulants/*adverse effects MH - Cross Reactions MH - Dose-Response Relationship, Immunologic MH - Drug Eruptions/diagnosis/*etiology MH - Drug Hypersensitivity/diagnosis/etiology MH - Eczema/*chemically induced/diagnosis MH - Female MH - Fondaparinux MH - Heparin/*adverse effects MH - Heparin, Low-Molecular-Weight/adverse effects MH - Heparinoids MH - Hirudins MH - Humans MH - Male MH - Middle Aged MH - Polysaccharides MH - Retrospective Studies MH - *Skin Tests MH - Young Adult OTO - NOTNLM OT - Allergic hypersensitivity OT - Allergie OT - Dermatitis OT - Eczema OT - Fondaparinux OT - Heparin OT - Hypersensibilite OT - Heparine OT - Skin tests OT - Tests cutanes EDAT- 2014/01/28 06:00 MHDA- 2014/12/15 06:00 CRDT- 2014/01/28 06:00 PHST- 2013/07/19 00:00 [received] PHST- 2013/09/20 00:00 [revised] PHST- 2013/10/29 00:00 [accepted] PHST- 2014/01/28 06:00 [entrez] PHST- 2014/01/28 06:00 [pubmed] PHST- 2014/12/15 06:00 [medline] AID - S0151-9638(13)01697-9 [pii] AID - 10.1016/j.annder.2013.10.040 [doi] PST - ppublish SO - Ann Dermatol Venereol. 2014 Jan;141(1):23-9. doi: 10.1016/j.annder.2013.10.040. Epub 2013 Dec 2.