raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:389

Langerhans cell histiocytosis

Synonyms: Histiocytosis X · Langerhans cell granulomatosis

Type
Disease
Group
Disorder
Inheritance
Unknown
Age of onset
All ages
Status
active

A rare systemic disease characterized by the accumulation (usually organized in granulomas) of macrophage, bearing the features of Langerhans cells in various tissues.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enLangerhans cell histiocytosisHistiocytosis X · Langerhans cell granulomatosis
frHistiocytose langerhansienneGranulomatose à cellules de Langerhans · Histiocytose X
deLangerhans-Zell-HistiozytoseHistiozytose X · Langerhans-Zell-Granulomatose
esHistiocitosis de células de LangerhansGranulomatosis de células de Langerhans
itIstiocitosi a cellule di LangerhansGranulomatosi a cellule di Langerhans · Istiocitosi X
nlLangerhanscelhistiocytoseHistiocytose X · Langerhanscelgranulomatose
ptHistiocitose de células de LangerhansGranulomatose de células de Langerhans · Histiocitose X
plHistiocytoza z komórek LangerhansaHistiocytoza X · Ziarniniakowatość komórek Langerhansa
csHystiocytóza z Langerhansových buněkHistiocytóza X · Granulomatóza z Langerhansových buněk
ukГістіоцитоз клітин ЛангергансаГістіоцитоз X · Гранулематоз з клітинами Лангерганса
zh朗格罕细胞组织细胞增生症朗格汉斯细胞肉芽肿病
trLangerhans hücreli histiyositozHistiyositoz X · Langerhans hücreli granülomatoz

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM604856Evalidated
ICD-10C96.0BTNTspecificvalidated
ICD-10C96.5BTNTspecificvalidated
ICD-10C96.6BTNTspecificvalidated
ICD-112B31.2Especificvalidated
ICD-112B31.20BTNTspecificvalidated
ICD-112B31.2YBTNTattributedvalidated
MONDO0018310Evalidated
MeSHD006646Evalidated
UMLSC0019621Evalidated
GARD6858Evalidated
MedDRA10069698Evalidated

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 (4):

Children (4):

Codes that Orphanet moved or referred to this one:

4

Genes

2 direct · 4 via subtypes
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MAP2K1Disease-causing germline mutation(s) inAssessedHGNC:6840ENSG0000016903217687215q22.31mitogen-activated protein kinase kinase 126980021[PMID]
NRASDisease-causing somatic mutation(s) inAssessedHGNC:7989ENSG000002132811647901p13.2NRAS proto-oncogene, GTPase27076591[PMID]

Recorded by Orphanet on subtypes of this disorder:

GeneSubtypeAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
BRAFORPHA:687730Unifocal Langerhans cell histiocytosisDisease-causing somatic mutation(s) inAssessedHGNC:1097ENSG000001577641647577q34B-Raf proto-oncogene, serine/threonine kinase22996177[PMID]
BRAFORPHA:687733Pulmonary Langerhans cell histiocytosisDisease-causing somatic mutation(s) inAssessedHGNC:1097ENSG000001577641647577q34B-Raf proto-oncogene, serine/threonine kinase22996177[PMID]
BRAFORPHA:687738Single-system multifocal Langerhans cell histiocytosisDisease-causing somatic mutation(s) inAssessedHGNC:1097ENSG000001577641647577q34B-Raf proto-oncogene, serine/threonine kinase22996177[PMID]
BRAFORPHA:687741Multisystem Langerhans cell histiocytosisDisease-causing somatic mutation(s) inAssessedHGNC:1097ENSG000001577641647577q34B-Raf proto-oncogene, serine/threonine kinase22996177[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0001.5 / 100 000EuropeValue and classValidated[EXPERT]

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

27 annotations · validated 2024-10-14
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002653Bone pain
HP:0002797Osteolysis
Frequent (79-30%)
HP:0012735Cough
HP:0000964Eczematoid dermatitis
HP:0001945Fever
HP:0002240Hepatomegaly
HP:0002716Lymphadenopathy
HP:0000988Skin rash
HP:0001744Splenomegaly
Occasional (29-5%)
HP:0001251Ataxia
HP:0000873Diabetes insipidus
HP:0001260Dysarthria
HP:0003249Genital ulcers
HP:0001510Growth delay
HP:0000365Hearing impairment
HP:0003073Hypoalbuminemia
HP:0001882Leukopenia
HP:0001268Mental deterioration
HP:0000155Oral ulcer
HP:0034769Pulmonary Langerhans cell histiocytosis
HP:0034323Reduced circulating growth hormone concentration
HP:0002108Spontaneous pneumothorax
HP:0001873Thrombocytopenia
HP:0001824Weight loss
Very rare (<4-1%)
HP:0001399Hepatic failure
HP:0002093Respiratory insufficiency
HP:0030991Sclerosing cholangitis

Run the differential on the 2 obligate / very frequent terms

Annotation source: 32106306[PMID]_29754885[PMID]_27273725[PMID]_34105821[PMID]

7

Sources for this card