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CHAPTER 13  ■  Bone Marrow Failure Syndromes                                245




                                                                                                                               Infections

                        BOX  13.1                                                                                              I                                                             q                              -


                                                                                                                                          m   . V                     ,                                  B,         -


                     Etiologic Classi  cation of Aplastic Anemia                                             a                        C,  m         ,  E         -B             ,                 m                ,
                                                                                                                                                 m             .         B         m                      (HPV)

                     DIRECT TOXICITY                                                                                                                                                    ,

                     Iatrogenic causes                                                                                                                     m                m                  mm          m     -

                     Radiation                                                                                                 m             . T    m            m

                     Chemotherapy                                                                                                                       m             q
                     Benzene                                                                                                                                           x                               m     ,

                     I      m           m                       m       mm                                                         m            m                         ,                     m



                     IMMUNE-MEDIATED CAUSES                                                                                                          m  ,               -                      mm           m      .

                     Iatrogenic causes                                                                                         I                ,                         m
                     Transfusion-associated graft versus host disease                                                          m                    .

                     Eosinophilic fasciitis                                                                                         H           -                                    m                                  -

                     Hepatitis-associated disease                                                                                         m                                     m                                      k

                     P                                                                                                                         . S

                     I      m           m                       m       mm                                                            m                                                                           . T

                     I                                   m                                                                                                    m                                                      m


                     a B                                                          -                  m            m .
                                                                                                                                                     m   . I   m                 ,                              -A,

                                                                                                                                    -B,      -C,              -G.  T                                             -

                                                                                                                                                                 m
                                    m        ,                          z                           q                                         k                                 . S

                                                               m                                          .                              m                            m                   mm

                   H           ,   x                                             K                                             m            m .

                   G     W                                 m                             m                                          A                                m                    q                         ,

                                    .                                                                                                             k                                           m                       -

                        B                                       z     m                       ,                                                                               m   .

                                     z      . B    z                   m           z                                                E       m                                                            m

                                                                     -                     ,                                             m                                                                  m   .

                            q            ,                                   m                        m    -                   A                 m                     m          mm               F    E

                                            m             m                       . I                ,                         (  %         %           F    E         m                   %       %

                   m                          z                                            m                                                         m              W    ),

                                    m                                                   q                                                    ,                                                    ,            m     ,

                                                                          m                        . T                                      (                     )   x                             A.

                                                               m   ,                                                                H           -                                      m

                                                                     x                    z      .                                           .  I           m           k                         (HLA)-m


                                                                                                                                                                                            m                          -
                   Drugs
                                                                                                                                     ,  mm                               m                  .
                   D                                                                    m   . U    k

                                                             z      ,           ,          f                 ,                 Pathophysiology

                                               m                    ,

                                       q     . T                             m                       -                         T   pathophysiology     mm       m                 m             ,

                                                                                                                                                                   x                m             . T    m

                       m                                         . D                             x                                                             mm

                          m      ,    m                     m                                           m                         m                                                                           ;   x  m-

                                       . B                                   ,              -                                                    m                        m

                                                                                                                                                      -                                        .  C             mm

                                           m                   m              m                    -                                             m                                                                   -

                         (           ). P                                        ,               ,                                                                                                            . P

                      m                                                                                                                                                                          m  m   .

                       m         m                  %.                                                                              H  m                            m                                                         -

                        O                                                               m   ,                                                          m                               . T       m                f -

                                                                        m        ,                     -                                                                    m       (          -    m            ,

                               ,                            ,                  z      ,    m               ,                       m         [CFU-S])         mm            m         (           -    m

                         m                                          .                                                               ,     mm               [CFU-C]). T    m                  m     m
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