TY - JOUR
T1 - Evaluation of 11C-choline PET/CT for primary diagnosis and staging of urothelial carcinoma of the upper urinary tract
T2 - a pilot study
AU - Sassa, Naoto
AU - Kato, Katsuhiko
AU - Abe, Shinji
AU - Iwano, Shingo
AU - Ito, Shinji
AU - Ikeda, Mitsuru
AU - Shimamoto, Kazuhiro
AU - Yamamoto, Seiichi
AU - Yamamoto, Tokunori
AU - Gotoh, Momokazu
AU - Naganawa, Shinji
N1 - Publisher Copyright:
© 2014, The Author(s).
PY - 2014/12
Y1 - 2014/12
N2 - Purpose: We conducted a pilot study to prospectively evaluate the efficacy of PET/CT with 11C-choline (choline PET/CT) for primary diagnosis and staging of urothelial carcinoma of the upper urinary tract (UUT-UC).Methods: Enrolled in this study were 16 patients (9 men, 7 women; age range 51 – 83 years, mean ± SD 69 ± 10.8 years) with suspected UUT-UC. The patients were examined by choline PET/CT, and 13 underwent laparoscopic nephroureterectomy and partial cystectomy. Lymphadenectomy and chemotherapy were also performed as necessary in some of the patients. Of the 16 patients, 12 were confirmed to have UUT-UC (7 renal pelvis carcinoma and 5 ureteral carcinoma), 1 had malignant lymphoma (ureter), 1 had IgG4-related disease (ureter), and 2 had other benign diseases (ureter).Results: Of the 16 study patients, 13 showed definite choline uptake in urothelial lesions, and of these, 11 had UUT-UC, 1 had malignant lymphoma, and 1 had IgG4-related disease. Three patients without choline uptake comprised one with UUT-UC and two with benign diseases. Of the 12 patients with UUT-UC, 3 had distant metastases, 2 had metastases only in the regional lymph nodes, and 7 had no metastases. Distant metastases and metastases in the regional lymph nodes showed definite choline uptake. The outcome in patients with UUT-UC, which was evaluated 592 – 1,530 days after surgery, corresponded to the patient classification based on the presence or absence of metastases and locoregional or distant metastases. Choline uptake determined as SUVmax 10 min after administration was significantly higher than at 20 min in metastatic tumours of UUT-UC (p < 0.05), whereas there was no statistically significant difference between the SUVmax values at 10 and those at 20 min in primary tumours of UUT-UC.Conclusion: This study suggests that choline PET/CT is a promising tool for the primary diagnosis and staging of UUT-UC.
AB - Purpose: We conducted a pilot study to prospectively evaluate the efficacy of PET/CT with 11C-choline (choline PET/CT) for primary diagnosis and staging of urothelial carcinoma of the upper urinary tract (UUT-UC).Methods: Enrolled in this study were 16 patients (9 men, 7 women; age range 51 – 83 years, mean ± SD 69 ± 10.8 years) with suspected UUT-UC. The patients were examined by choline PET/CT, and 13 underwent laparoscopic nephroureterectomy and partial cystectomy. Lymphadenectomy and chemotherapy were also performed as necessary in some of the patients. Of the 16 patients, 12 were confirmed to have UUT-UC (7 renal pelvis carcinoma and 5 ureteral carcinoma), 1 had malignant lymphoma (ureter), 1 had IgG4-related disease (ureter), and 2 had other benign diseases (ureter).Results: Of the 16 study patients, 13 showed definite choline uptake in urothelial lesions, and of these, 11 had UUT-UC, 1 had malignant lymphoma, and 1 had IgG4-related disease. Three patients without choline uptake comprised one with UUT-UC and two with benign diseases. Of the 12 patients with UUT-UC, 3 had distant metastases, 2 had metastases only in the regional lymph nodes, and 7 had no metastases. Distant metastases and metastases in the regional lymph nodes showed definite choline uptake. The outcome in patients with UUT-UC, which was evaluated 592 – 1,530 days after surgery, corresponded to the patient classification based on the presence or absence of metastases and locoregional or distant metastases. Choline uptake determined as SUVmax 10 min after administration was significantly higher than at 20 min in metastatic tumours of UUT-UC (p < 0.05), whereas there was no statistically significant difference between the SUVmax values at 10 and those at 20 min in primary tumours of UUT-UC.Conclusion: This study suggests that choline PET/CT is a promising tool for the primary diagnosis and staging of UUT-UC.
KW - C-Choline PET/CT
KW - Renal pelvis
KW - Upper urinary tract
KW - Ureter
KW - Urothelial carcinoma
UR - http://www.scopus.com/inward/record.url?scp=84938519094&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938519094&partnerID=8YFLogxK
U2 - 10.1007/s00259-014-2871-y
DO - 10.1007/s00259-014-2871-y
M3 - Article
C2 - 25104209
AN - SCOPUS:84938519094
SN - 1619-7070
VL - 41
SP - 2232
EP - 2241
JO - European Journal of Nuclear Medicine
JF - European Journal of Nuclear Medicine
IS - 12
ER -