A 21 month old boy with acute lymphoblastic leukemia diagnosed on 17th September 1971, was treated according to the Memphis Study VII of Pinkel. Bone marrow examination, 39 days after treatment, showed complete remission. The patient has since then been in continuous complete remission. Therapy was suspended twice (29 days and 18 days) because of interstitial pneumonia. The treatment was terminated on 9th October 1974 nearly 3 years after onset of the disease. Because of papillary thyroid carcinoma with metastases in the regional lymph nodes, a total thyreoidectomy with removal of lymphnodes was performed on 30th April 1977. Because of a relapse in the neck lymphnodes, the patient was treated in December 1977 with radioiodine. The prognosis is however not discouraging.