bladder%20cancer
BLADDER CANCER

Bladder cancer is a heterogenous neoplasm that ranges from non-life-threatening, low-grade, superficial papillary lesions to high-grade invasive tumors that often metastasizes at the presentation.

It is the most common cancer involving the urinary system and it is the 11th most commonly diagnosed in the world.

Microscopic or gross painless hematuria is the most common presenting complaint.

Bladder%20cancer Treatment

Principles of Therapy

  • Non-muscle-invasive tumors management is directed at reducing recurrences and preventing progression to a more advanced stage
  • Goals of therapy for muscle-invasive lesions are to determine if the bladder should be removed or preserved without compromising survival, and to determine if the primary lesion can be managed independently, or if patients are at high risk for distant spread requiring systemic approaches to improve the likelihood of cure
    • Therapy for patients with metastatic lesions should focus on prolongation and quality of life

Pharmacotherapy

Intravesical Chemotherapy

  • In low-risk patients, and those presumed to be at intermediate risk with previous low recurrence rate, a single, immediate, post-operative intravesical instillation of chemotherapy has been considered to be the standard and sufficient treatment
    • Shown to act by the destruction of circulating tumor cells resulting from TURB and by an ablative effect (chemoresection) on residual tumor cells at the resection site and on small overlooked tumors
    • Although for other patients, it remains an incomplete treatment because of the considerable likelihood of recurrence and/or progression
  • Induction therapy should be administered within 24 hours after TURBT
    • During induction weekly installations are given for approximately 6 weeks
    • 2 consecutive cycle inductions is the maximum without complete response
  • Gemcitabine and Mitomycin are the most widely used agents for intravesical chemotherapy
    • Alternative options to Gemcitabine and Mitomycin include Epirubicin, Valrubicin, Docetaxel, or sequential Gemcitabine/Docetaxel or Gemcitabine/Mitomycin
  • Adjuvant Cisplatin combination chemotherapy after radical cystectomy is considered for patients with a diagnosis of muscle-invasive or lymph-node-positive urothelial bladder cancer for whom neoadjuvant chemotherapy was not suitable
  • Adjuvant intravesical chemotherapy should be initiated 3-4 weeks after TURBT

Intravesical Bacillus Calmette-Guérin (BCG) Immunotherapy 

  • Treatment option for patients with non-muscle-invasive disease
    • May be considered in patients with stage IIIB muscle invasive bladder cancer with partial response after concurrent chemoradiotherapy
  • Intravesical BCG regimen consists of 6-week induction course followed by maintenance dose with 3-weekly installations at 3, 6, 12, 18, 24, 30 and 36 months
    • For patients with intermediate risk maintenance is given ideally for 1 year while for those with high risk non-muscle invasive disease it is given for 3 years
    • If there is substantial local symptoms experienced during the maintenance therapy dose reduction is encouraged
    • It has been shown in recent data that maintenance BCG therapy results in decreased rate of recurrence of non-muscle invasive disease

Systemic Therapy

  • Neoadjuvant chemotherapy using a Cisplatin combination regimen before radical cystectomy or radical radiotherapy is suggested in patients with diagnosed T2-T4a, cN0M0 muscle invasive bladder cancer
  • For patients with muscle-invasive bladder cancer, chemotherapy regimen recommendations include:
    • Preferred neoadjuvant or adjuvant regimen is Gemcitabine and Cisplatin for 4 cycles or DDMVAC (dose-dense Methotrexate, Vinblastine, Doxorubicin and Cisplatin) with growth factor support for 3 or 4 cycles
      • Alternative is CMV (Cisplatin, Methotrexate and Vinblastine) for 3 cycles
  • For patients with locally advanced or metastatic urothelial bladder cancer who are otherwise physically fit and have adequate renal function, a Cisplatin-based chemotherapy regimen is suggested
  • For patients with locally advanced or metastatic bladder cancer, 1st-line chemotherapy regimen include:
    • Preferred regimens for Cisplatin-eligible patients are Gemcitabine with Cisplatin or DDMVAC with growth factor support
    • In patients who are ineligible for systemic therapy with Cisplatin, the preferred regimens include Gemcitabine with Carboplatin or Atezolizumab or Pembrolizumab
      • Atezolizumab and Pembrolizumab may be considered in patients with PD-L1-expressing tumor or those ineligible for any platinum-containing chemotherapy regardless if positive for PD-L1 expression
      • Other recommended regimens include Gemcitabine monotherapy or Gemcitabine with Paclitaxel
      • Conditional regimens that may be considered include Ifosfamide, Doxorubucin, and Gemcitabine
  • Checkpoint inhibitors such as Pembrolizumab (preferred), Atezolizumab, Nivolumab, Durvalumab, Avelumab and Erdafitinib are recommended as 2nd-line systemic therapy of locally advanced or metastatic bladder cancer after platinum-based therapy
    • Other recommended regimens include Paclitaxel or Docetaxel and Gemcitabine
    • Conditional regimens that may be considered based on patient’s medical history include Ifosfamide + Doxorubicin + Gemcitabine, Gemcitabine + Paclitaxel, Gemcitabine + Cisplatin, and DDMVAC with growth factor support
  • Recommended systemic therapy for locally advanced or metastatic bladder cancer after checkpoint inhibitor-based therapy include:
    • Preferred regimens for Cisplatin-eligible patients and without prior chemotherapy: Gemcitabine with Cisplatin or DDMVAC with growth factor support
    • Gemcitabine + Cisplatin combination regimen is recommended for patients who are ineligible for systemic therapy and chemotherapy-naive
    • Other recommended regimens include Erdafitinib, Paclitaxel or Docetaxel, and Gemcitabine
    • Conditional regimens that may be considered include Gemcitabine and Paclitaxel or Ifosfamide/Doxorubicin/Gemcitabine combination therapy
  • Recommended subsequent-line systemic therapy for locally advanced or metastatic bladder cancer after platinum and checkpoint inhibitor therapy include:
    • Preferred regimens: Enfortumab vedotin or Erdafitinib
      • Erdafitinib may only be used for patients with susceptible FGFR3 or FGFR2 genetic alterations
    • Other recommended regimens include Gemcitabine, Paclitaxel or Docetaxel, Ifosfamide/Doxorubicin/Gemcitabine, Gemcitabine with Paclitaxel, Gemcitabine with Cisplatin, and DDMVAC with growth factor support
  • Pembrolizumab may also be considered in patients with high-risk non-muscle invasive bladder cancer with Cis unresponsive to BCG treatment and ineligible for cystectomy
Editor's Recommendations
Most Read Articles
21 Nov 2020
Ivermectin confers benefits in the treatment of COVID-19, with a recent study showing that its use helps reduce the risk of death especially in patients with severe pulmonary involvement.
6 days ago
Mental health comorbidities are common among patients with type 2 diabetes mellitus and may lead to worse outcomes, a recent study has found.
Roshini Claire Anthony, 13 Nov 2020

Diabetes is a key risk factor for heart failure (HF), which is the leading cause of hospitalization in patients with or without diabetes. SGLT-2* inhibitors (SGLT-2is) have been shown to reduce the risk of hospitalization for HF (HHF) regardless of the presence or absence of diabetes.

3 days ago
Vitamin D deficiency may be a contributing factor to the mortality rate among patients with the novel coronavirus disease (COVID-19), reports a new study.