ORPHA:100079
Neuroendocrine neoplasm of appendix
Also known as: Appendiceal NEN · Appendiceal neuroendocrine neoplasm · NEN of appendix
Query health: suspect — Only one of 2 strategies returned hits (phrase).
Publications
295
82.8th percentile
Trials
0
Interventional, condition-specific
Researchers
1,173
Distinct authors in sample
Gene link
—
Readiness
1/6
Stages with a signal
Clinical definition (Orphanet)
A rare sporadic neoplasm of the appendix and the second most common type of digestive endocrine tumor, often with no specific clinical presentation. They are divided into either classic endocrine tumor of the appendix or the more aggressive goblet cell carcinoma (GCC).
Cross-references
Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.
- MONDO:0015066
- UMLS:C3272767
- NCIT:C96422
Additional Mondo synonyms (10)
appendiceal NEN · appendiceal neuroendocrine neoplasm · appendiceal neuroendocrine tumor · appendiceal neuroendocrine tumour · appendix NET · appendix neuroendocrine tumor · appendix neuroendocrine tumour · appendix well differentiated endocrine tumor · appendix well differentiated endocrine tumor/carcinoma · appendix well differentiated endocrine tumour
Research stages
Trial readiness signals
Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”
1/6 stages with a signal
Research-stage checklist from open sources (GenCC, literature, Monarch when enriched, ClinicalTrials.gov). Not a prognosis or care recommendation.
- Gene identifiedNot found
No GenCC disease–gene assertion in this build
- LiteraturePresent
295 matched papers (264 in last 10 years) Source
- Phenotype characterisedNot checked
Not yet enriched from Monarch / HPO
- Animal modelNot checked
Not yet enriched from Monarch / Alliance
- Orphan designationNot checked
FDA/EMA orphan-drug designation not enriched yet
- Interventional trialNot found
No matched interventional trial under our ClinicalTrials.gov rules
Biology
Genes and phenotypes
Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.
Do we know what causes it?
Not yet — the cause hasn't been pinned down in GenCC.
No strong gene–disease assertion joined for this Orphanet entity.
Phenotypes (Monarch / HPO)
Not enriched in this build — Monarch phenotype joins were not run for this record.
Animal models (Monarch / Alliance)
Not enriched in this build.
Literature
Is anyone studying this?
295
295 papers have ever been published on this condition (under this name). For scale, breast cancer has over 700,000. Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=5449) is 41.
295 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 41 (publications denominator n=5449).
264 in the last 10 years · high confidence · 82.8th percentile (publications denominator)
Phrase hits: 295 · MeSH hits: 0
Who's working on it?
1,173
Distinct author names in 200 sampled papers — named people below.
Who's working on it?
No interventional trial matched this name; these authors publish on it in the sampled literature — a practical starting point for contact.
- 01Burandt E24 papers · 2026
General, Visceral and Thoracic Surgery Department and Clinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 02Hube-Magg C24 papers · 2026
Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 03Krech T24 papers · 2026
General, Visceral and Thoracic Surgery Department and Clinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 04Sauter G24 papers · 2026
Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 05Simon R24 papers · 2026
Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 06Steurer S24 papers · 2026
General, Visceral and Thoracic Surgery Department and Clinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 07Bernreuther C23 papers · 2026
Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 08Clauditz TS23 papers · 2026
Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 09Fraune C23 papers · 2026
Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC - 10Kluth M23 papers · 2026
Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Papers in Europe PMC
Clinical research
Is a treatment being tested?
0
interventional trials for this specific condition
No interventional trial testing a treatment matched this specific condition name. 1 observational study did — shown below because natural-history and cohort work can be an important step toward a trial.
Data as of 27 July 2026
No matched interventional trials. This is true for 73% of diseases in the trials denominator (5114 of 7003). Here are the researchers publishing on it.
high confidence · 36.5th percentile (trials denominator)
Recruiting interventional trials
From the matched ClinicalTrials.gov set
No interventional trial testing a treatment was found for this specific condition name on ClinicalTrials.gov.
See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.
Observational and natural-history studies
1 observational study matches this condition. These do not test a treatment and are not counted in the interventional-trial headline, but they are genuine research: natural-history work often defines the endpoints needed for a future rare-disease trial, and families may be able to enroll.
Recruiting or not-yet-recruiting
- NCT05734430·RECRUITING·Genetics of Appendix Cancer Study
Conditions: Appendix Cancer · Appendiceal Cancer · Appendiceal Neoplasms · Appendiceal Mucinous Neoplasm·Matched via name phrase
Where to find support
We do not yet link condition-specific patient organisations. These umbrella groups support undiagnosed and ultra-rare families:
India — NPRD
Last verified 2026-07-26This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.
Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.
How we counted this
Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.
"Neuroendocrine neoplasm of appendix" OR "Neuroendocrine neoplasm of the appendix" OR "Appendiceal NEN" OR "Appendiceal neuroendocrine neoplasm" OR "NEN of appendix" OR "NEN of the appendix" OR "appendiceal neuroendocrine tumor" OR "appendiceal neuroendocrine tumour" OR "appendix NET" OR "appendix neuroendocrine tumor" OR "appendix neuroendocrine tumour" OR "appendix well differentiated endocrine tumor" OR "appendix well differentiated endocrine tumor/carcinoma" OR "appendix well differentiated endocrine tumour"
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Neuroendocrine neoplasm of appendix" OR "Neuroendocrine neoplasm of the appendix" OR "Appendiceal NEN" OR "Appendiceal neuroendocrine neoplasm" OR "NEN of appendix" OR "NEN of the appendix" OR "appendiceal neuroendocrine tumor" OR "appendiceal neuroendocrine tumour" OR "appendix NET" OR "appendix neuroendocrine tumor" OR "appendix neuroendocrine tumour" OR "appendix well differentiated endocrine tumor" OR "appendix well differentiated endocrine tumor/carcinoma" OR "appendix well differentiated endocrine tumour" OR "neuroendocrine tumor of the colon, well differentiated, low or intermediate grade tumor" OR "epithelial tumor of the appendix" OR "appendix neuroendocrine neoplasm"
Recall-expansion terms: neuroendocrine tumor of the colon, well differentiated, low or intermediate grade tumor, epithelial tumor of the appendix, appendix neuroendocrine neoplasm
Study-type breakdown: 0 interventional · 1 observational · 0 expanded access. Only interventional studies enter the trial headline.
Query health: suspect — strategies attempted: phrase, recall-expansion; with hits: phrase
Run this search on ClinicalTrials.gov
Confidence reasoning
- Preferred label is multi-word and distinctive
- No synonyms dropped by stoplist
- No label/synonym collisions with other diseases in this corpus
Ingested 2026-07-27T07:02:23.011Z