| Inclusion Criteria: | 1) Patient with one of the following documented mastocytosis: Smouldering Systemic, Mastocytosis, Indolent Systemic Mastocytosis, Cutaneous Mastocytosis.
2) Patient with documented mastocytosis and evaluable disease based upon histological criteria: typical infiltrates of mast cells in a multifocal or diffuse pattern in skin and/or bone marrow biopsy
3) Patient with documented treatment failure of his/her handicap(s) with at least one of the following therapy used at optimized dose: Anti H1, Anti H2, Proton pump inhibitor, Osteoclast inhibitor, Cromoglycate sodium, Antileukotriene, Other therapies used for the symptomatic care. These therapies should be maintained at the same dose during the study. No change in the symptomatic treatment of mastocytosis or administration of any new treatment of mastocytosis should occur.
4) Handicapped status defined as at least two of the following handicaps, including at least one among pruritus, flushes, depression and asthenia: pruritus score >/= 6, number of flushes per week >/= 7, Hamilton rating scale (depression) >/= 10, number of stools per day >/= 4, number of mictions per day >/=8, Fatigue Impact Scale total score (asthenia) >/= 40.
5) Patient with OPA >/= 2 (moderate to intolerable general handicap). 1-None; 2-Mild; 3-Moderate; 4-Severe; 5-Intolerable
6) ECOG </= 2
7) Patient with adequate organ function : absolute neutrophil count (ANC) >/= 2.0 x 10^9/L, platelets (PTL) >/= 100 x 10^9/L, AST/ALT </= 2.5x ULN (</= 5 x ULN in case of liver mast cell involvement), bilirubin </= 1.5x ULN, creatinine </= 1.5 x ULN, albumin > 0.75 x LLN, urea </= 1.5 x ULN, negative proteinuria defined as negative dipstick; in case of the positive dipstick (proteinuria equal to or greater than 30 mg/dL), 24 hours proteinuria < 1.5g/24 hours.
8) Subjects must be >/= 18 years of age.
9) Men and women of child bearing potential (entering the study after a confirmed menstrual period and who have a negative pregnancy test) must agree to use 2 methods of medically acceptable forms of contraception during the study. Men and women of childbearing potential must agree using contraception for three months following their participation in the study
10) Patient should be able and willing to comply with study visits and procedures per protocol.
11) Patient should understand, sign, and date the written voluntary informed consent form at the screening visit prior to any protocol-specific procedures performed.
12) Patient must be covered by insurance for routine costs (applicable to European patients only). |