The possible influence of an extravascular pool of FIX and a source of haemostatically active FIX, bound to collagen IV, warrant further investigation. Therefore, clinical assessment of the frequency and severity of bleeds remains an important measure of the efficacy of treatment

for haemophilia B, and the role of PK-guided therapy for patients with haemophilia B remains to be established. With respect to the infectious safety of replacement therapy, although blood derivatives can be considered reasonably safe for classical pathogens, the threat of emerging pathogens is ever present. The identification of virus variants that evade standard donor screening and the demonstration that non-lipid-enveloped viruses are less susceptible to viral inactivation steps should motivate the haemophilia community to remain constantly vigilant and justify the use of the safest replacement therapies, with no exception HDAC inhibitor for patients with haemophilia B. find more Mike Laffan has received speaker and advisory fees from Pfizer, CSL Behring, Bayer and Octapharma and travel support from CSL Behring. Erik Berntorp has no conflict to declare. Gerry Dolan has received honoraria for speaking or advisory boards from Pfizer, Baxter, Bayer, Biotest, CSL Behring,

Grifols, Novo Nordisk and Octapharma. Elena Santagostino received fees as a speaker in meetings organised by Bayer, Baxter, Pfizer, CSL Behring, Novo Nordisk, Biotest, Kedrion, Octapharma and Grifols, acted as a paid consultant for Bayer, Pfizer, CSL Behring, Novo Endonuclease Nordisk and Grifols and received unrestricted research grants from Novo Nordisk and Pfizer. Cedric Hermans has received honoraria from Bayer, Baxter, Pfizer, Sobi Biogen, CSL Behring, LFB, Octapharma, Novo Nordisk

and CAF-DCF. “
“In this chapter the most recent developments on arthropathy in hemophilia patients with and without inhibitors are reviewed. Early long-term prophylaxis is strongly recommended in children with severe hemophilia. In joint bleeds not responding to substitution of factor VIII to normal factor VIII levels angiographic embolization might be considered as a promising therapeutic option. Recent data indicate disruption of normal development for adolescents with inhibitors. Some case reports indicate the benefit of secondary prophylaxis with rFVIIa in a patient with severe hemophilia A and inhibitors. Surgical procedures in hemophilia patients with factor inhibitors can be accomplished safely and effectively with FEIBA and/or rFVIIa, although the risk of complications is higher than in hemophilia patients without inhibitors. In elderly hemophilic patients with arthropathy, quality of life can be improved by adequate pain medication, rehabilitation, orthopaedic interventions and adaptation at home. Little is known regarding the management of arthropathy in elderly patients, and hence further studies are warranted.