raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:99361

Isolated familial medullary thyroid carcinoma

Synonyms: Hereditary isolated MTC · Isolated familial MTC

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Status
active

A rare thyroid tumor characterized by a malignant neoplasm derived from the calcitonin-secreting parafollicular C-cells of the thyroid and occurring familially, but not as a component of multiple endocrine neoplasia syndromes. The commonly multifocal, bilateral nodules are typically located at the junction of the upper and middle thirds of the thyroid lobes. Clinically, patients may present with diarrhea, flushing, or weight loss caused by excessive secretion of calcitonin by the tumor. In rare cases, the tumor can also cause Cushing syndrome due to ectopic corticotropin production.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIsolated familial medullary thyroid carcinomaHereditary isolated MTC · Isolated familial MTC
frCancer médullaire de la thyroïde familial isoléMTC familial isolé
deIsoliertes familiäres medulläres SchilddrüsenkarzinomIsoliertes familiäres MTC
esCarcinoma medular de tiroides familiar aisladoMTC familiar aislado · MTC hereditario aislado
itCarcinoma midollare familiare della tiroideMTC familiare
nlGeïsoleerd familiaal medullair schildkliercarcinoomGeïsoleerd familiaal MTC
ptCarcinoma medular da tiroide isoladoMTC isolado familiar · MTC isolado hereditário
plRodzinny rak rdzeniasty tarczycyRodzinny MTC
csFamiliární medulární karcinom štítné žlázyFamiliární MTC
ukСімейна медулярна карцинома щитоподібної залозиСімейний MTC
zh家族性甲状腺髓样癌家族性MTC
trailesel medüller tiroid karsinomuAilesel MTC

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM155240Evalidated
ICD-10C73NTBTattributedvalidated
ICD-112D10.4NTBTattributedvalidated
MONDO0007958Evalidated
MeSHC536911Evalidated
UMLSC1833921Evalidated
MedDRA10073153Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

No children.

4

Genes

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ESR2Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:3468ENSG0000014000960166314q23.2-q23.3estrogen receptor 226945007[PMID]
NTRK1Disease-causing germline mutation(s) inAssessedHGNC:8031ENSG000001984001913151q23.1neurotrophic receptor tyrosine kinase 110443680[PMID]
RETDisease-causing germline mutation(s) inAssessedHGNC:9967ENSG0000016573116476110q11.21ret proto-oncogene10443680[PMID]_20833330[PMID]_20301434[PMID]
5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card