What does Methotrexate treat? treats Juvenile Arthritis, Rheumatoid Arthritis, Breast Neoplasms, Choriocarcinoma, Crohn Disease, Esophageal Neoplasms, Hydatidiform Mole, Leukemia, Lung Neoplasms, Mycosis Fungoides, Psoriasis, Osteosarcoma, Stomach Neoplasms and Testicular Neoplasms