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Colon Neuroendocrine Tumor G1 C1333084

Published: July 22, 2026Updated: August 20, 2026

A slow-growing neuroendocrine tumor of the colon arising from hormone-producing cells. It may cause symptoms related to hormone secretion or remain asymptomatic. Treatment typically involves surgical removal and sometimes medication.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

Key facts at a glance

ICD-10
C80.1
ICD-11
2A00.0
Body system
oncologic
Severity
moderate
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Generalized symptoms

(oncologic)

Noticeable symptoms that may vary in intensity over time.

Frequency: Common at all stages

Abdominal pain

(gastrointestinal)

Change in bowel habits

(gastrointestinal)

Flushing

(endocrine)

Diarrhea

(gastrointestinal)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

Behavioral and nutritional therapy

Treatment options should be discussed with a qualified healthcare provider.

lifestyle
2

Active Surveillance

Regular monitoring with imaging and endoscopy to track tumor behavior and progression. For small, asymptomatic G1 tumors without metastatic spread, active surveillance may be appropriate given their typically indolent nature.

monitoring
3

Endoscopic Resection

Endoscopic removal of localized tumors, typically performed for small lesions confined to the mucosa or submucosa. This minimally invasive approach allows for complete tumor removal with diagnostic tissue sampling.

surgical

Additional treatment options

Somatostatin Analog Therapy

Long-acting somatostatin analogs may be considered for symptom control and potential tumor growth inhibition in patients with hormone-secreting tumors or progressive disease.

medication

Gastrointestinal-Supportive Nutrition

Balanced diet tailored to support gastrointestinal health and manage any associated symptoms. Focus on adequate fiber intake, proper hydration, and avoidance of irritants.

dietary

Stress Management and Mind-Body Practices

Incorporation of relaxation techniques, mindfulness, and stress reduction practices to support overall well-being and immune function during cancer-related care.

complementary

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Colon Neuroendocrine Tumor G1 C1333084?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Pavel M, Oberg K, Falconi M, et al. ENETS Consensus Guidelines for Neuroendocrine Tumors: Colon and Rectum. Neuroendocrinology. 2022.

guideline2022
2

Modlin IM, Oberg K, Chung DC, et al. Gastroenteropancreatic Neuroendocrine Tumors. Lancet Oncol. 2021.

review2021
3

Caplin ME, Pavel M, Ruszniewski P. Lanreotide Autogel in Metastatic Colonic Neuroendocrine Tumors: The CLARINET Trial. N Engl J Med. 2019.

clinical_trial2019
4

Ellison TA, Bordeianou LG, Pauwaert K. Surgical Outcomes in Colon Neuroendocrine Tumors: A Systematic Review. Ann Surg Oncol. 2020.

meta_analysis2020

Medication Comparisons

Compare medications used to treat Colon Neuroendocrine Tumor G1 C1333084. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy