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ORPHA:423786

Undifferentiated carcinoma of stomach

high confidenceDisorder

Also known as: Undifferentiated gastric carcinoma

Publications

495

68.6th percentile

Trials

2

Interventional, condition-specific

Researchers

1,225

Distinct authors in sample

Gene link

—

Readiness

2/6

Stages with a signal

Clinical definition (Orphanet)

Undifferentiated carcinoma of stomach is a rare epithelial tumour of the stomach that lacks any features of differentiation beyond an epithelial . The presenting symptoms are usually vague and nonspecific, such as weight loss, anorexia, fatigue, epigastric pain and discomfort, heartburn and nausea, vomiting or hematemesis. Patients may also be asymptomatic. Ascites, jaundice, intestinal obstruction and peripheral lymphadenopathy indicate advanced stages and metastatic spread.

How rare: 1-9 / 1 000 000 — roughly one to nine people per million. In a city the size of Kolkata, perhaps a few dozen.

Orphanet entry

Cross-references

Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.

Additional Mondo synonyms (9)

Gastric undifferentiated carcinoma · anaplastic carcinoma of stomach · anaplastic carcinoma of the stomach · anaplastic gastric carcinoma · stomach undifferentiated carcinoma · undifferentiated carcinoma of stomach · undifferentiated carcinoma of the stomach · undifferentiated gastric (stomach) cancer · undifferentiated gastric carcinoma

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.”

2/6 stages with a signal

An interventional trial matched this condition name on ClinicalTrials.gov — see trials below.

  1. Gene identifiedNot found

    No GenCC disease–gene assertion in this build

  2. LiteraturePresent

    495 matched papers (206 in last 10 years) Source

  3. Phenotype characterisedNot found

    No HPO disease–phenotype associations via Monarch for these Mondo IDs

  4. Animal modelNot found

    No Alliance genotype “model of” associations via Monarch for these Mondo IDs

  5. Orphan designationNot found

    No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source

  6. Interventional trialPresent

    2 matched on ClinicalTrials.gov

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)

None returned for this Mondo ID. That often means “not linked under this ID,” not “no clinical features.”

Animal models (Monarch / Alliance)

None returned for this Mondo ID. Empty here is not proof that no model organism work exists under another name or gene.

Monarch fetch 2026-07-29

Therapies

Designations, candidates, and chemicals

FDA OOPD and EMA orphan designations, Open Targets clinical candidates, and CTD chemical associations via MyDisease.info. These never change the interventional-trial headline.

Orphan designation (FDA · EMA)

No designation matched this disease via UMLS or preferred name on the FDA OOPD mirror or EMA orphan register. Absence here is not proof that none exists under another wording.

Open Targets candidates

No drugs or clinical candidates returned for this Mondo ID on Open Targets.

CTD chemicals (MyDisease.info)

No CTD chemical associations returned for this Mondo ID.

Literature

Is anyone studying this?

495

495 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=3967) is 59.

495 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 59 (publications denominator n=3967).

206 in the last 10 years · high confidence · 68.6th percentile (publications denominator)

Phrase hits: 495 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,225

Distinct author names in 200 sampled papers — named people below.

Who's working on it?

People publishing on this condition (sampled Europe PMC records). Affiliation is the most recent found in that sample.

  1. 01
    Luo B6 papers · 2023

    Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, Qingdao, China.

    Papers in Europe PMC
  2. 02
    Zhang Y6 papers · 2026

    Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, Qingdao, China.

    Papers in Europe PMC
  3. 03
    Chen X5 papers · 2025

    Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wannan Medical College, Wuhu, China.

    Papers in Europe PMC
  4. 04
    Li Q5 papers · 2025

    Department of Integrated Traditional Chinese and Western Medicine, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China.

    Papers in Europe PMC
  5. 05
    Chen L4 papers · 2025

    Department of Pathology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350005, P.R. China.

    Papers in Europe PMC
  6. 06
    Chen Y4 papers · 2026

    Digestive Medical Department, Minqin People's Hospital, Minqin.

    Papers in Europe PMC
  7. 07
    Chen Z4 papers · 2026

    Department of General Surgery, The Affiliated Lihuili Hospital of Ningbo University, Ningbo, 315000, People's Republic of China.

    Papers in Europe PMC
  8. 08
    Li L4 papers · 2026

    Pathology Department, Qilu Hospital of Shandong University, Jinan, China.

    Papers in Europe PMC
  9. 09
    Li T4 papers · 2024

    Cancer Immunotherapy Program, University of California, San Francisco, California.

    Papers in Europe PMC
  10. 10
    Liu S4 papers · 2026

    Department of Medical Microbiology, Qingdao University Medical College, Qingdao, 266021, China.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

2

interventional trials for this specific condition

2 interventional trials matched this specific condition name; none in our sample are currently recruiting. 51 trials are registered for undifferentiated carcinoma, the broader category — shown separately because they may or may not enrol this specific subtype.

Data as of 11 September 2026

2 interventional trials — more than 77.2% of diseases in the trials denominator have none at all (5501 of 7126; this disease is at the 84.5th percentile).

high confidence · 84.5th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

2 interventional trials matched after quoted-phrase search and title/condition post-filter.

No currently recruiting studies in the matched set. Open the same search on ClinicalTrials.gov.

Broader category: undifferentiated carcinoma

51

Interventional trials for the parent category, exclusive of NCT IDs already counted above. Eligibility for this subtype is not guaranteed.

Worth raising with a clinician. How we count trials.

Recruiting under the broader category

Other registries (secondary)

Broader net from EU CTIS, ISRCTN, and ICTRP when available — deduped against ClinicalTrials.gov IDs already counted above. Dual-model LLM relevance gates what we keep. These rows are not added to the interventional headline.

raw 9 · after dedupe 9 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 9 · dropped 0 · fetched 2026-07-30

Source notes: ictrp: Error: ICTRP public search unavailable (WHO portal is SPA-only; SOAP needs partnership). Tried: https://apps.who.int/tri

No secondary-registry studies passed dual-model relevance for this condition name (after dedupe).

Uncertain / not reviewed (9)

Where to find support

Condition-specific patient organisations, when Orphanet lists them, are on the disease’s Orphanet page. We also link umbrella groups that support undiagnosed and ultra-rare families.

Orphanet entry for Undifferentiated carcinoma of stomach — check Associations / patient organisations on that page.

India — NPRD

Last verified 2026-07-26

This 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.

"Undifferentiated carcinoma of stomach" OR "Undifferentiated carcinoma of the stomach" OR "Undifferentiated gastric carcinoma" OR "Gastric undifferentiated carcinoma" OR "anaplastic carcinoma of stomach" OR "anaplastic carcinoma of the stomach" OR "anaplastic gastric carcinoma" OR "stomach undifferentiated carcinoma" OR "undifferentiated gastric (stomach) cancer"

Run this search on Europe PMC

ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):

"Undifferentiated carcinoma of stomach" OR "Undifferentiated carcinoma of the stomach" OR "Undifferentiated gastric carcinoma" OR "Gastric undifferentiated carcinoma" OR "anaplastic carcinoma of stomach" OR "anaplastic carcinoma of the stomach" OR "anaplastic gastric carcinoma" OR "stomach undifferentiated carcinoma" OR "undifferentiated gastric (stomach) cancer"

Interventional trials matched via: phrase (mesh = registered under a MeSH descriptor no name phrase would catch; recall-expansion = gene / selected parent terms used only for trials).

Study-type breakdown: 2 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.

Parent-category trials query:

"undifferentiated carcinoma"

Query health: ok — strategies attempted: phrase; 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 2026-07-27T15:53:21.926Z