The 99mTc-HMPAO leukocyte scan: an alternative to radiology and endoscopy in evaluating the extent and the activity of inflammatory bowel disease.
Seventy-eight patients, 47 with Crohn's disease and 31 with ulcerative colitis, were studied using 99mTc-HMPAO-labelled leukocytes, in order to assess the reliability of the scan in evaluating the location and activity of the disease. The granulocyte integrity was assessed by evaluating the lung wash-out and the early liver and spleen uptake using a 20 minute initial dynamic study. The results of the leukocyte scan revealed a high correlation with radiological and endoscopic findings in the diagnosis of the inflamed bowel segments. The disease activity correlated well with uptake in the bowel, graded from 0 to 3. The leukocyte scan exactly documented the activity in the 9 cases of Crohn's disease located in the ileum and in 5 cases in which the endoscopic exploration was hampered by scarring. Four fistulae were correctly visualized. Moreover, the change in activity after therapy in 6 patients was documented. This technique provides images of excellent quality, superior to those obtainable with indium-111.
Spinelli
F
F
Department of Nuclear Medicine, Ospedale Niguarda-Ca' Granda, Milan, Italy.
Milella
M
M
Sara
R
R
Banfi
F
F
Vigorelli
R
R
Possa
M
M
Bianchi Porro
G
G
Ardizzone
S
S
Gallitelli
L
L
D000328:Adult; D001466:Barium Sulfate; D003093:Colitis, Ulcerative / Q000000981:diagnostic imaging*; D003424:Crohn Disease / Q000000981:diagnostic imaging*; D016099:Endoscopy, Gastrointestinal; D004733:Enema; D005260:Female; D006801:Humans; D007962:Leukocytes; D008297:Male; D015609:Organotechnetium Compounds; D010091:Oximes; D011877:Radionuclide Imaging; D019690:Technetium Tc 99m Exametazime
D015609:Organotechnetium Compounds; D010091:Oximes; D001466:Barium Sulfate; D019690:Technetium Tc 99m Exametazime