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Living with Urinary bladder small cell neuroendocrine carcinoma

A fast-growing bladder cancer that looks like small cell lung cancer under the microscope and mainly affects adults.

Understanding Urinary bladder small cell neuroendocrine carcinoma

Urinary bladder small cell neuroendocrine carcinoma is an aggressive bladder cancer that looks like small cell lung cancer under the microscope.

It mainly affects adults. In most cases it is linked with carcinoma in situ, an early cancer that has not spread beyond the lining of the bladder. Common signs involve urination.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • A growth in the bladder (bladder neoplasm)
  • Blood in the urine (hematuria)
  • Painful or hard urination (dysuria)
  • Belly pain
  • Frequent urinary tract infections

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include cancer specialists, hormone specialists and urinary and male reproductive system specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Cancer specialists (oncologists); Hormone specialists (endocrinologists); Urinary and male reproductive system specialists (urologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Bladder Cancer Advocacy Network
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
How was this type of bladder cancer confirmed?
What treatment options exist for this type?
Which specialists should be on my care team?

Quick facts

Symptoms usually startAdult

GARD doesn't describe a cause for this condition yet.

EndocrineUrinary and Reproductive

Also known as: bladder small cell neuroendocrine cancer; bladder small cell neuroendocrine carcinoma; poorly differentiated neuroendocrine carcinoma of the bladder; sccb; small cell bladder cancer; small cell bladder carcinoma

Patient organizations

Source: NIH GARD · Urinary bladder small cell neuroendocrine carcinomaGARD ID 11923 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Urinary bladder small cell neuroendocrine carcinoma.

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