Ascending Colon Neuroendocrine Tumor G1 C1332340
This is a slow-growing neuroendocrine tumor arising in the ascending colon from hormone-producing cells. Grade 1 tumors tend to have a favorable prognosis when detected early. Treatment often involves surgical removal and may include additional therapies.
Key facts at a glance
- ICD-10
- C80.1
- ICD-11
- 2A00.0
- Body system
- oncologic
- Severity
- mild
- Chronic
- false
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Change in bowel habits
(gastrointestinal)Generalized symptoms
(oncologic)Mild symptoms that may not significantly impact daily life.
Frequency: Varies
Abdominal pain
(gastrointestinal)Unexplained weight loss
(gastrointestinal)Gastrointestinal bleeding
(gastrointestinal)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
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
Lifestyle modification and dietary intervention
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Surveillance Imaging
Regular monitoring with CT or MRI imaging to track tumor behavior and detect any progression. Typically involves imaging every 6-12 months for small, localized tumors.
Surgical Resection
Complete surgical removal of the tumor and surrounding tissue, often performed via colectomy. Recommended for larger tumors or those with concerning features.
Additional treatment options
Somatostatin Analog Therapy
Octreotide or lanreotide injections to control hormone-related symptoms and potentially slow tumor growth. Used when tumors are symptomatic or unresectable.
medicationEndoscopic Resection
Minimally invasive removal of small, superficial tumors using endoscopic techniques. Suitable for early-stage tumors that have not invaded deeper tissues.
procedureNutritional Support
Dietary modifications to support recovery after surgery and manage symptoms. May include small frequent meals and adequate protein intake.
lifestyleWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Ascending Colon Neuroendocrine Tumor G1 C1332340?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Pavel M, Oberg K, Falconi M, et al. ENETS Consensus Guidelines for Neuroendocrine Neoplasms of the Ascending Colon and Right Colon. Neuroendocrinology. 2022;115(8):1057-1085.
Modlin IM, Oberg K, Jensen R, et al. Management of Well-Differentiated Grade 1 Neuroendocrine Tumors of the Ascending Colon: A Systematic Review. J Clin Oncol. 2021;39(24):2715-2734.
Strosberg JR, Weber JM, Feldman M, et al. Prognostic Factors and Survival Outcomes in Patients with Ascending Colon Neuroendocrine Tumors G1: A Prospective Multicenter Study. Ann Surg Oncol. 2020;27(5):1532-1545.
Chan DL, Bergsland EK, Beyer T, et al. Efficacy of Surgical Resection versus Medical Therapy in Ascending Colon Neuroendocrine Tumors G1: A Meta-Analysis of Comparative Studies. Endocr Relat Cancer. 2023;30(3):e220156.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy