raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:158061

Macrophage activation syndrome

Type
Clinical syndrome
Group
Disorder
Age of onset
Adolescent, Adult, Childhood
Status
active

A rare hemophagocytic syndrome characterized by excessive activation and proliferation of macrophages and T cells occurring in the context of a variety of diseases, including infections, neoplasms, rheumatic disorders, and leading to sudden onset of persistent fever, lymphadenopathy, and hepatosplenomegaly. Complications include profound depression of one or more blood cell lines with coagulopathy and pancytopenia, and impaired liver and renal function. Bone marrow examination reveals numerous well differentiated macrophages actively phagocytosing hematopoietic elements.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMacrophage activation syndrome
frSyndrome d'activation macrophagique
deMakrophagen-Aktivierungssyndrom
esSíndrome de activación macrofágica
itSindrome da attivazione dei macrofagi
nlMacrofaagactivatiesyndroom
ptSíndrome de activação macrofágica
plZespół aktywacji makrofagów
csSyndrom aktivovaných makrofágů
ukСиндром активації макрофагів
zh吞噬细胞激活综合征
trMakrofaj aktivasyon sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10D76.1NTBTattributedvalidated
ICD-114A01.2YNTBTattributedvalidated
MONDO0015545Evalidated
MeSHD055501Evalidated
UMLSC1096155Evalidated
GARD12124Evalidated
MedDRA10053867Evalidated

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

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (3):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyNot yet validatedORPHANET

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

29 annotations · validated 2021-11-25
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0011117Abnormal circulating interleukin concentration
HP:0040089Abnormal natural killer cell countDiagnostic criterion
HP:0011118Abnormality of tumor necrosis factor secretion
HP:0001903Anemia
HP:0002960Autoimmunity
HP:0001410Decreased liver function
HP:0031964Elevated circulating alanine aminotransferase concentration
HP:0003565Elevated erythrocyte sedimentation rate
HP:0001945FeverDiagnostic criterion
HP:0012156HemophagocytosisDiagnostic criterion
HP:0003073Hypoalbuminemia
HP:0003281Increased circulating ferritin concentrationDiagnostic criterion
HP:0030783Increased circulating interleukin 6 concentration
HP:0025435Increased circulating lactate dehydrogenase concentration
HP:0012649Increased inflammatory response
HP:0030356Increased serum interferon-gamma level
HP:0001873Thrombocytopenia
Frequent (79-30%)
HP:0001875Decreased total neutrophil count
HP:0011227Elevated circulating C-reactive protein concentration
HP:0031956Elevated circulating aspartate aminotransferase concentration
HP:0002155HypertriglyceridemiaDiagnostic criterion
HP:0011900HypofibrinogenemiaDiagnostic criterion
HP:0005681Juvenile rheumatoid arthritis
HP:0002716Lymphadenopathy
HP:0001744SplenomegalyDiagnostic criterion
Occasional (29-5%)
HP:0001298Encephalopathy
HP:0012115Hepatitis
HP:0002240Hepatomegaly
HP:0002725Systemic lupus erythematosus

Run the differential on the 12 obligate / very frequent terms

Annotation source: 31732958[PMID]_30774631[PMID]_28409239[PMID]

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Sources for this card