FACTOR IX DEFICIENCY
\fˈaktə ɹˌə͡ʊmən nˈa͡ɪn dɪfˈɪʃənsi], \fˈaktə ɹˌəʊmən nˈaɪn dɪfˈɪʃənsi], \f_ˈa_k_t_ə ɹ_ˌəʊ_m_ə_n_ n_ˈaɪ_n d_ɪ_f_ˈɪ_ʃ_ə_n_s_i]\
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A deficiency of blood coagulation factor IX inherited as an X-linked disorder. (Also known as Christmas Disease, after the first patient studied in detail, not the holy day.) Historical and clinical features resemble those in classic hemophilia (HEMOPHILIA A), but patients present with fewer symptoms. Severity of bleeding is usually similar in members of a single family. Many patients are asymptomatic until the hemostatic system is stressed by surgery or trauma. Treatment is similar to that for hemophilia A. (From Cecil Textbook of Medicine, 19th ed, p1008)
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Word of the day
tinctura quininae ammoniata
- A preparation made by dissolving quinin sulphate in alcohol [Br. Ph.].