Isolated trigonocephaly
diseaseOn this page
Also known as non-syndromic metopic craniosynostosisnonsyndromic trigonocephaly
Summary
Isolated trigonocephaly (MONDO:0018065) is a disease with 2 cohort genes.
At a glance
- Prevalence: 1-5 / 10 000 (Europe) [Orphanet-validated]
- Cohort genes: 2
- Phenotypes (HPO): 12
Clinical features
Epidemiology
Prevalence records
2 prevalence record(s), Orphanet:
| Type | Class | Value | Geography | Validation |
|---|---|---|---|---|
| Point prevalence | 1-5 / 10 000 | 10.2979 | Europe | Validated |
| Prevalence at birth | 1-9 / 100 000 | 6.7 | Europe | Not yet validated |
Signs & symptoms
Clinical features (HPO)
12 HPO clinical features (Orphanet curated; top 12 by frequency):
| HPO ID | Term | Frequency |
|---|---|---|
| HP:0000243 | Trigonocephaly | Very frequent (80-99%) |
| HP:0011330 | Metopic synostosis | Very frequent (80-99%) |
| HP:0000336 | Prominent supraorbital ridges | Frequent (30-79%) |
| HP:0000341 | Narrow forehead | Frequent (30-79%) |
| HP:0000431 | Wide nasal bridge | Frequent (30-79%) |
| HP:0000601 | Hypotelorism | Frequent (30-79%) |
| HP:0000664 | Synophrys | Frequent (30-79%) |
| HP:0002553 | Highly arched eyebrow | Frequent (30-79%) |
| HP:0000750 | Delayed speech and language development | Occasional (5-29%) |
| HP:0001539 | Omphalocele | Occasional (5-29%) |
| HP:0001085 | Papilledema | Very rare (<1-4%) |
| HP:0002516 | Increased intracranial pressure | Very rare (<1-4%) |
Identifiers
Disease identifiers
| Field | Value |
|---|---|
| Canonical name | isolated trigonocephaly |
| Mondo ID | MONDO:0018065 |
| OMIM | 190440 |
| Orphanet | 3366 |
| UMLS | C5575700 |
| MedGen | 1812049 |
| GARD | 0016626 |
| Is cancer (heuristic) | no |
Also known as: non-syndromic metopic craniosynostosis · nonsyndromic trigonocephaly
Data availability: 2 GenCC gene-disease records.
Disease family
An umbrella term covering 2 Mondo subtypes.
Classification path: disease › human disease › disease by body system or component › musculoskeletal system disorder › skeletal system disorder › bone disorder › bone development disease › dysostosis › trigonocephaly › isolated trigonocephaly
Subtypes (2): trigonocephaly 1, trigonocephaly 2
Genetics & variants
GWAS landscape
No GWAS associations recorded — common-variant (GWAS) studies don’t cover this disease (typical for Mendelian / rare diseases). See the curated gene cohort and Mendelian overlap below.
Variant details and genetic-evidence tiers
No tiered GWAS variants or ClinVar records for this disease.
Genes & proteins
Mendelian disease overlap and somatic drivers
GenCC: 51 · Orphanet: 21 · OMIM-shared: 0 · Dual-evidence (GWAS+Mendelian): 0
GenCC gene–disease validity (cohort genes)
the Disease column is the GenCC-asserted condition — a cohort gene’s strongest validity may be for a related predisposition syndrome.
| Gene | Classification | Inheritance | Disease | Records |
|---|---|---|---|---|
| FREM1 | Strong | Autosomal dominant | trigonocephaly 2 | 15 |
| FGFR1 | Supportive | Autosomal dominant | isolated trigonocephaly | 36 |
Orphanet rare-disease linkage (cohort genes)
| Gene | Orphanet ID | Rare disease |
|---|---|---|
| FREM1 | Orphanet:217266 | BNAR syndrome |
| FREM1 | Orphanet:2717 | Oculotrichoanal syndrome |
| FREM1 | Orphanet:3366 | Non-syndromic metopic craniosynostosis |
| FREM1 | Orphanet:93100 | Renal agenesis, unilateral |
| FGFR1 | Orphanet:168953 | Myeloid/lymphoid neoplasm associated with FGFR1 rearrangement |
| FGFR1 | Orphanet:2117 | Hartsfield syndrome |
| FGFR1 | Orphanet:220386 | Semilobar holoprosencephaly |
| FGFR1 | Orphanet:2396 | Encephalocraniocutaneous lipomatosis |
| FGFR1 | Orphanet:251576 | Gliosarcoma |
| FGFR1 | Orphanet:251579 | Giant cell glioblastoma |
| FGFR1 | Orphanet:251615 | Pilomyxoid astrocytoma |
| FGFR1 | Orphanet:2645 | Osteoglosphonic dysplasia |
| FGFR1 | Orphanet:280200 | Microform holoprosencephaly |
| FGFR1 | Orphanet:314950 | Primary hypereosinophilic syndrome |
| FGFR1 | Orphanet:3157 | Septo-optic dysplasia spectrum |
| FGFR1 | Orphanet:3366 | Non-syndromic metopic craniosynostosis |
| FGFR1 | Orphanet:432 | Normosmic congenital hypogonadotropic hypogonadism |
| FGFR1 | Orphanet:478 | Kallmann syndrome |
| FGFR1 | Orphanet:93258 | Pfeiffer syndrome type 1 |
| FGFR1 | Orphanet:93924 | Lobar holoprosencephaly |
| FGFR1 | Orphanet:99798 | Oligodontia |
Cohort genes → proteins
2 cohort genes, 2 distinct canonical proteins.
Evidence partition
| Subset | Genes |
|---|---|
| multi_evidence | 2 |
Cohort genes (full)
| Symbol | HGNC | Ensembl | UniProt | Name | Evidence |
|---|---|---|---|---|---|
| FREM1 | HGNC:23399 | ENSG00000164946 | Q5H8C1 | FRAS1-related extracellular matrix protein 1 | gencc |
| FGFR1 | HGNC:3688 | ENSG00000077782 | P11362 | Fibroblast growth factor receptor 1 | gencc |
Cohort function summary
Lead sentence per gene, UniProt-curated.
| Symbol | Protein name | Function (lead sentence) |
|---|---|---|
| FREM1 | FRAS1-related extracellular matrix protein 1 | Extracellular matrix protein that plays a role in epidermal differentiation and is required for epidermal adhesion during embryonic development. |
| FGFR1 | Fibroblast growth factor receptor 1 | Tyrosine-protein kinase that acts as a cell-surface receptor for fibroblast growth factors and plays an essential role in the regulation of embryonic development, cell proliferation, differentiation and migration. |
Protein-family classification
Druggable: 1 · Difficult: 0 · Unknown: 1 · Druggable fraction: 0.5
Family distribution
Cohort families vs a genome-wide background (hypergeometric, BH-FDR; fold = observed/expected). Counts kept; sorted by enrichment, so the catch-all Other/Unknown bucket no longer leads.
| Family | Genes | Fold | FDR |
|---|---|---|---|
| Kinase | 1 | 13.9× | 0.142 |
| Other/Unknown | 1 | 0.9× | 0.805 |
Per-gene assignment
| Symbol | Family | Druggable? | EC | InterPro (top 3) |
|---|---|---|---|---|
| FREM1 | Other/Unknown | no | C-type_lectin-like, Calx_beta, C-type_lectin-like/link_sf | |
| FGFR1 | Kinase | yes | 2.7.10.1 | Prot_kinase_dom, Ser-Thr/Tyr_kinase_cat_dom, Ig_sub2 |
Expression context
Cohort genes with no expression data: 0.
2 cohort genes are a single-cell marker in ≥1 SCXA experiment.
Breadth distribution (Bgee present_calls)
| Bucket | Genes |
|---|---|
| narrow (1-5 tissues) | 0 |
| moderate (6-20) | 0 |
| broad (>20) | 2 |
| unknown | 0 |
Top tissues across cohort
| Tissue | Cohort genes |
|---|---|
| kidney epithelium | 1 |
| metanephros | 1 |
| smooth muscle tissue | 1 |
| buccal mucosa cell | 1 |
| calcaneal tendon | 1 |
| stromal cell of endometrium | 1 |
Per-gene tissue summary (top 30)
| Symbol | Bgee breadth | FANTOM5 breadth | SCXA | Top tissues |
|---|---|---|---|---|
| FREM1 | 171 | broad | marker | kidney epithelium, smooth muscle tissue, metanephros |
| FGFR1 | 292 | ubiquitous | marker | buccal mucosa cell, stromal cell of endometrium, calcaneal tendon |
Protein interactions among cohort
Intra-cohort edges: 0.
Hub genes (top 10 by interactor count)
| Symbol | Interactor count |
|---|---|
| FGFR1 | 5,693 |
| FREM1 | 1,541 |
Structural data
PDB: 1 · AlphaFold-only: 1 · No structure: 0
Cohort genes with PDB structures (top 30)
| Symbol | UniProt | PDB entries |
|---|---|---|
| FGFR1 | P11362 | 83 |
AlphaFold-only cohort genes (top 30 by pLDDT)
| Symbol | UniProt | pLDDT |
|---|---|---|
| FREM1 | Q5H8C1 | 75.75 |
Function
Pathway analysis
Distinct Reactome pathways touched by cohort: 22. Enrichment computed across 2 evidence-associated genes (1 with Reactome annotation).
Pathways by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 1 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| Pathway | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| Signaling by FGFR1 amplification mutants | 1 | 5710.0× | 0.003 | FGFR1 |
| FGFR1c and Klotho ligand binding and activation | 1 | 2855.0× | 0.003 | FGFR1 |
| Signaling by plasma membrane FGFR1 fusions | 1 | 2855.0× | 0.003 | FGFR1 |
| Epithelial-Mesenchymal Transition (EMT) during gastrulation | 1 | 1427.5× | 0.003 | FGFR1 |
| FGFR1b ligand binding and activation | 1 | 1268.9× | 0.003 | FGFR1 |
| Signaling by activated point mutants of FGFR1 | 1 | 951.7× | 0.004 | FGFR1 |
| FGFR1c ligand binding and activation | 1 | 761.3× | 0.004 | FGFR1 |
| Phospholipase C-mediated cascade: FGFR1 | 1 | 671.8× | 0.004 | FGFR1 |
| Downstream signaling of activated FGFR1 | 1 | 543.8× | 0.004 | FGFR1 |
| Signal transduction by L1 | 1 | 519.1× | 0.004 | FGFR1 |
| PI-3K cascade:FGFR1 | 1 | 519.1× | 0.004 | FGFR1 |
| SHC-mediated cascade:FGFR1 | 1 | 496.5× | 0.004 | FGFR1 |
| FRS-mediated FGFR1 signaling | 1 | 456.8× | 0.004 | FGFR1 |
| Formation of paraxial mesoderm | 1 | 407.9× | 0.004 | FGFR1 |
| Negative regulation of FGFR1 signaling | 1 | 368.4× | 0.004 | FGFR1 |
| Signaling by FGFR1 in disease | 1 | 292.8× | 0.004 | FGFR1 |
| PI3K Cascade | 1 | 271.9× | 0.004 | FGFR1 |
| NCAM signaling for neurite out-growth | 1 | 271.9× | 0.004 | FGFR1 |
| Constitutive Signaling by Aberrant PI3K in Cancer | 1 | 126.9× | 0.009 | FGFR1 |
| PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling | 1 | 96.8× | 0.011 | FGFR1 |
| PIP3 activates AKT signaling | 1 | 66.8× | 0.016 | FGFR1 |
| RAF/MAP kinase cascade | 1 | 61.1× | 0.016 | FGFR1 |
GO biological processes by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 2 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| GO term | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| vitamin D3 metabolic process | 1 | 4213.0× | 0.004 | FGFR1 |
| positive regulation of mitotic cell cycle DNA replication | 1 | 4213.0× | 0.004 | FGFR1 |
| positive regulation of parathyroid hormone secretion | 1 | 4213.0× | 0.004 | FGFR1 |
| regulation of extrinsic apoptotic signaling pathway in absence of ligand | 1 | 4213.0× | 0.004 | FGFR1 |
| regulation of phosphate transport | 1 | 2808.7× | 0.004 | FGFR1 |
| fibroblast growth factor receptor signaling pathway involved in orbitofrontal cortex development | 1 | 2808.7× | 0.004 | FGFR1 |
| regulation of lateral mesodermal cell fate specification | 1 | 2808.7× | 0.004 | FGFR1 |
| ventricular zone neuroblast division | 1 | 2106.5× | 0.004 | FGFR1 |
| negative regulation of fibroblast growth factor production | 1 | 2106.5× | 0.004 | FGFR1 |
| positive regulation of phospholipase activity | 1 | 1685.2× | 0.004 | FGFR1 |
| regulation of branching involved in salivary gland morphogenesis by mesenchymal-epithelial signaling | 1 | 1685.2× | 0.004 | FGFR1 |
| diphosphate metabolic process | 1 | 1685.2× | 0.004 | FGFR1 |
| chordate embryonic development | 1 | 1404.3× | 0.004 | FGFR1 |
| positive regulation of MAPKKK cascade by fibroblast growth factor receptor signaling pathway | 1 | 1404.3× | 0.004 | FGFR1 |
| cementum mineralization | 1 | 1203.7× | 0.004 | FGFR1 |
| auditory receptor cell development | 1 | 936.2× | 0.004 | FGFR1 |
| paraxial mesoderm development | 1 | 842.6× | 0.004 | FGFR1 |
| lung-associated mesenchyme development | 1 | 842.6× | 0.004 | FGFR1 |
| craniofacial suture morphogenesis | 1 | 842.6× | 0.004 | FREM1 |
| response to sodium phosphate | 1 | 842.6× | 0.004 | FGFR1 |
| outer ear morphogenesis | 1 | 766.0× | 0.004 | FGFR1 |
| branching involved in salivary gland morphogenesis | 1 | 702.2× | 0.005 | FGFR1 |
| organ induction | 1 | 601.9× | 0.005 | FGFR1 |
| mesenchymal cell proliferation | 1 | 561.7× | 0.005 | FGFR1 |
| positive regulation of endothelial cell chemotaxis | 1 | 495.6× | 0.006 | FGFR1 |
| cell projection assembly | 1 | 468.1× | 0.006 | FGFR1 |
| regulation of postsynaptic density assembly | 1 | 443.5× | 0.006 | FGFR1 |
| cell communication | 1 | 421.3× | 0.006 | FREM1 |
| positive regulation of vascular endothelial cell proliferation | 1 | 421.3× | 0.006 | FGFR1 |
| middle ear morphogenesis | 1 | 351.1× | 0.007 | FGFR1 |
Therapeutics
Drug target analysis
Approved (phase 4): 1 · Phase ≥3: 1 · Phased (≥1): 1 · Undrugged: 1
Druggability breadth: 1 of 2 evidence-associated genes (50%) have a ChEMBL target (buckets above are over the deeply-mined display cohort).
Genes with an approved drug
The molecule shown is one approved compound that hits the gene — not necessarily a drug of choice or one indicated for this disease.
| Symbol | Example approved molecule |
|---|---|
| FGFR1 | PONATINIB |
Top cohort targets by molecule count
| Symbol | Molecules | Max phase |
|---|---|---|
| FGFR1 | 93 | 4 |
| FREM1 | 0 | 0 |
Drugs targeting cohort genes (top 30)
| Molecule | Max phase | Targets in cohort |
|---|---|---|
| PONATINIB | 4 | FGFR1 |
| PEMIGATINIB | 4 | FGFR1 |
| NINTEDANIB | 4 | FGFR1 |
| FEDRATINIB | 4 | FGFR1 |
| TIVOZANIB | 4 | FGFR1 |
| LENVATINIB | 4 | FGFR1 |
| AXITINIB | 4 | FGFR1 |
| SORAFENIB | 4 | FGFR1 |
| NICLOSAMIDE | 4 | FGFR1 |
| INFIGRATINIB PHOSPHATE | 4 | FGFR1 |
| INFIGRATINIB | 4 | FGFR1 |
| REGORAFENIB | 4 | FGFR1 |
| ENTRECTINIB | 4 | FGFR1 |
| CABOZANTINIB | 4 | FGFR1 |
| CAPIVASERTIB | 4 | FGFR1 |
| VANDETANIB | 4 | FGFR1 |
| NINTEDANIB ESYLATE | 4 | FGFR1 |
| BRIGATINIB | 4 | FGFR1 |
| ERDAFITINIB | 4 | FGFR1 |
| UPADACITINIB | 4 | FGFR1 |
| FUTIBATINIB | 4 | FGFR1 |
| PAZOPANIB | 4 | FGFR1 |
| SUNITINIB | 4 | FGFR1 |
| DASATINIB | 4 | FGFR1 |
| MIDOSTAURIN | 4 | FGFR1 |
| LINIFANIB | 3 | FGFR1 |
| SEMAXANIB | 3 | FGFR1 |
| OLVEREMBATINIB | 3 | FGFR1 |
| BRIVANIB ALANINATE | 3 | FGFR1 |
| ORANTINIB | 3 | FGFR1 |
Bioactivity and enzyme data
Enzyme cohort genes (≥1 EC): 1.
Cohort genes with ChEMBL bioactivity (full, sorted by assay count)
| Symbol | Assays | Type breakdown |
|---|---|---|
| FGFR1 | 1,465 | Binding:1428, Functional:24, ADMET:13 |
Cohort enzymes (BRENDA EC)
| Symbol | EC numbers | Names |
|---|---|---|
| FGFR1 | 2.7.10.1 | receptor protein-tyrosine kinase |
Cohort genes with high screening signal
≥100 ChEMBL assays — a studied-ness signal; see Therapeutics for approved-drug status.
| Symbol | ChEMBL assays |
|---|---|
| FGFR1 | 1,465 |
Pharmacogenomics
Cohort genes with a PharmGKB record: 2; with CPIC/DPWG dosing guidelines: 0.
No cohort gene has a CPIC/DPWG genotype-guided dosing guideline (PharmGKB).
Chemical tractability of cohort targets
30 approved/phased compounds have measured bioactivity against a cohort gene (and aren’t yet in disease-level trials). This is a research / tractability signal, NOT a therapeutic recommendation — a bioactivity row often reflects off-target or screening binding (e.g. promiscuous kinase inhibitors against a cohort kinase), implying no disease mechanism.
| Compound | Max phase | Cohort target (bioactivity) |
|---|---|---|
| PONATINIB | 4 | FGFR1 |
| PEMIGATINIB | 4 | FGFR1 |
| NINTEDANIB | 4 | FGFR1 |
| FEDRATINIB | 4 | FGFR1 |
| TIVOZANIB | 4 | FGFR1 |
| LENVATINIB | 4 | FGFR1 |
| AXITINIB | 4 | FGFR1 |
| SORAFENIB | 4 | FGFR1 |
| NICLOSAMIDE | 4 | FGFR1 |
| INFIGRATINIB PHOSPHATE | 4 | FGFR1 |
| INFIGRATINIB | 4 | FGFR1 |
| REGORAFENIB | 4 | FGFR1 |
| ENTRECTINIB | 4 | FGFR1 |
| CABOZANTINIB | 4 | FGFR1 |
| CAPIVASERTIB | 4 | FGFR1 |
| VANDETANIB | 4 | FGFR1 |
| NINTEDANIB ESYLATE | 4 | FGFR1 |
| BRIGATINIB | 4 | FGFR1 |
| ERDAFITINIB | 4 | FGFR1 |
| UPADACITINIB | 4 | FGFR1 |
| FUTIBATINIB | 4 | FGFR1 |
| PAZOPANIB | 4 | FGFR1 |
| SUNITINIB | 4 | FGFR1 |
| DASATINIB | 4 | FGFR1 |
| MIDOSTAURIN | 4 | FGFR1 |
| LINIFANIB | 3 | FGFR1 |
| SEMAXANIB | 3 | FGFR1 |
| OLVEREMBATINIB | 3 | FGFR1 |
| BRIVANIB ALANINATE | 3 | FGFR1 |
| ORANTINIB | 3 | FGFR1 |
Druggability pyramid
Cohort genes binned by druggability tier (high → low):
| Tier | Definition | Genes | Symbols |
|---|---|---|---|
| A | Approved (phase 4 drug) | 1 | FGFR1 |
| B | Phased (≥1) drug, not yet approved | 0 | |
| C | Druggable family + PDB, no drug | 0 | |
| D | Druggable family + AlphaFold only, no drug | 0 | |
| E | Difficult family or no structure, no drug | 1 | FREM1 |
Undrugged target profiles
1 cohort genes are undrugged. Ranked by ‘starting-point quality’ (assay depth + drugged-partner adjacency).
| Symbol | ChEMBL assays | Drugged partners (top 3) |
|---|---|---|
| FREM1 | 0 | — |
Clinical trials & evidence
Clinical trials
Clinical trials: 0.