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Three sequential 99mTc-HMPAO-white blood cell scintigraphies performed in a patient diagnosed with Crohn’s disease. A: Performed at diagnosis, there is evidence of increased activity involving colon ascendens; B: Performed at follow-up after immunological therapy, a complete remission can be demonstrated; C: There is evidence of a relapse involving colon ascendens and sigma-rectum. Reprinted with permission of Springer Verlag from Caobelli et al[34].
