Ns. Rosenthal et Dc. Farhi, MYELODYSPLASTIC SYNDROMES AND ACUTE MYELOID-LEUKEMIA IN CONNECTIVE-TISSUE DISEASE AFTER SINGLE-AGENT CHEMOTHERAPY, American journal of clinical pathology, 106(5), 1996, pp. 676-679
Cytopenias are typical of patients with connective tissue disease (CTD
) and are usually related to autoimmune phenomena. In some cases, cyto
penia may be tile result of treatment with cytotoxic agents. Although
multi-drug therapy is known to produce myelodysplastic syndromes (MDS)
and acute myeloid leukemia (AML) in patients with CTD, treatment with
single-agent therapy, particularly methotrexate, has rarely been asso
ciated with secondary MDS or AML. Blood and marrow samples were studie
d from 3 men and 5 women with rheumatoid arthritis (5 cases), Behcet's
disease (2 cases), and systemic lupus erythematosus (1 case) developi
ng MDS or ARIL after methotrexate (5 cases), chlorambucil(2 cases), an
d cytoxan(1 case). The durations of CTD ranged from less than 5 months
to more than 10 years. Five patients (63%) presented with MDS includi
ng refractory anemia (RA), refractory thrombocytopenia (RT), refractor
y anemia with excess blasts (RAEB), chronic myelomonocytic leukemia (C
MML), and RAEB in transformation. Patients with RT, CMML, and RAEB in
transformation developed AML. Of six patients presenting with or devel
oping AML, four had AML with differentiation (FAB M2), one acute myelo
monocytic leukemia (FAB M4), and one M4Eo, Inv 16 was seen in the M4Eo
and t(8; 21) in one case of M2. Four of six patients are alive up to
6 rears after diagnosis of AML. One of three patients with MDS is aliv
e 6 months after diagnosis of MDS, Cytopenias in patients with CTD may
be due to therapy-related MDS or AML occurring in a setting of single
-agent chemotherapy, including methotrexate.