Eingeschränkte vs Ausgedehnte Lymphadenektomie LEA

Prospektiv Randomisierte Studie Zum Vergleich Einer Ausgedehnten Mit Einer eingeschränkten Pelvinen Lymphadenektomie Bei Der Operativen Therapie Des Harnblasenkarzinoms

This trial evaluates the therapeutic benefit of extended versus limited lymphadenectomy at the time of radical cystectomy in patients with bladder cancer.

The extent of pelvic lymphadenectomy in the surgical treatment of muscle-invasive, clinically locally bladder cancer is not yet standardized. There are no data from randomized, prospective studies on the prognostic role of regional lymphadenectomy. Results of retrospective studies suggest, that the prognosis of patients with muscle-invasive bladder cancer can be improved by extending the limits of pelvic lymphadenectomy. Furthermore it could be demonstrated in a prospective study that the pattern of metastasis of bladder cancer has a high variability. About two-thirds of lymph node metastases are found outside the normally cleared areas of lymphadenectomy. In this study patients will be randomized into arms with limited versus extended lymphadenectomy. The limited lymphadenectomy includes the removal of the obturatoric, external and internal iliac lymph nodes, the extended one includes the removal of all lymph nodes between pelvic floor and the inferior mesenteric artery. The primary objective of the study is to detemine the influence of limited versus extended lyphadenectomy at the time of radical cystectomy on recurrence-free survival. Secondary study objectives include the influence on cancer-specific survival, overall survival, complication rates, histopathologic N-stage, the localization of recurrence and influence of adjuvant chemotherapy . Adjuvant chemotherapy is optional and is recommended in patients with locally advanced disease (pT3/4) or regional lymph node metastasis (pN+).

Field 5 (Group external iliac rigt) Field 7 (Group external iliac left) Field 9 (obturatorical Group right) Field 11 (obturatorical Group left) Field 13 (Group internal iliac right) Field 14 (Group internal iliac left)

Field 1 (paracaval right) Field 2 (interaortocaval) Field 3 (paraaortal left) Field 4 (Group iliac artery right) Field 5 (Group external iliac rigt) Field 6 (Group iliac artery left) Field 7 (Group external iliac left) Field 8 (presacral) Field 9 (obturatorical Group right) Field 10 (deep obturatorical Group right) Field 11 (obturatorical Group left) Field 12 (deep obturatorical Group left) Field 13 (Group internal iliac right) Field 14 (Group internal iliac left)

Definition Recurrence-free survival: Time from radical cystectomy to tumor reccurence or death from any cause up to 5 years

Definition Cancer-specific suvival: Time from radical cystectomy to death from bladder cancer up to 5 years

Definition Effect on histopathologic stage: Influence of extended lymphadenectomy on detection of lymph node metastasis

Inclusion Criteria: Histologically proven, invasive urothelial bladder cancer, locally completely resectable (T1G3 - T4a, Nx) Age >= 18 years Written consent of the patient Patient compliance and geographic proximity to allow adequate follow-up Exclusion Criteria: Histologically or by imaging diagnostics proven organ metastases Radiographic evidence of enlarged lymph nodes (> 1 cm) above the aortic bifurcation in conjunction with pelvic lymph node metastases Radiographic or other evidence of T4b-tumor (infiltration of the pelvic wall or other organ systems) Prior neoadjuvant chemotherapy of bladder cancer Prior previous pelvic lymphadenectomy Prior radiotherapy to the pelvis internal medical or anesthetic risk factors that require a short operation time Palliative cystectomy (f.e. bulky-disease, infiltration of adjacent structures) Evidence of another tumor restricting life expectancy of the patient

Gschwend JE, Heck MM, Lehmann J, Rubben H, Albers P, Wolff JM, Frohneberg D, de Geeter P, Heidenreich A, Kalble T, Stockle M, Schnoller T, Stenzl A, Muller M, Truss M, Roth S, Liehr UB, Leissner J, Bregenzer T, Retz M. Extended Versus Limited Lymph Node Dissection in Bladder Cancer Patients Undergoing Radical Cystectomy: Survival Results from a Prospective, Randomized Trial. Eur Urol. 2019 Apr;75(4):604-611. doi: 10.1016/j.eururo.2018.09.047. Epub 2018 Oct 15.

Froehner M, Novotny V, Heberling U, Rutsch L, Litz RJ, Hubler M, Koch R, Baretton GB, Wirth MP. Relationship of the number of removed lymph nodes to bladder cancer and competing mortality after radical cystectomy. Eur Urol. 2014 Dec;66(6):987-90. doi: 10.1016/j.eururo.2014.07.046. Epub 2014 Aug 19.