raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:100026

Gamma-heavy chain disease

Synonyms: Franklin disease · Gamma-HCD

Type
Clinical subtype
Group
Subtype of disorder
Age of onset
Adult
Status
active

A type of HCD characterized by the production of incomplete monoclonal gamma-heavy chains without associated light chains. The clinical presentation most commonly resembles that of patients with systemic lymphoproliferative/autoimmune diseases.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enGamma-heavy chain diseaseFranklin disease · Gamma-HCD
frMaladie des chaînes lourdes gammaGamma-HCD · Maladie de Franklin
deGamma-SchwerkettenkrankheitFranklin-Krankheit · Gamma-HCD
esEnfermedad de cadenas pesadas gamma
itMalattia delle catene pesanti gammaGamma-HCD · Malattia di Franklin
nlGamma-zwareketenziekteGamma-HCD · Ziekte van Franklin
ptDoença da cadeia pesada gama
plChoroba łańcuchów ciężkich gammaChoroba Franklina · Gamma-HCD
csNemoc z těžkých řetězců gamaFranklinova nemoc · Gama HCD
ukХвороба важких ланцюгів ГаммаХвороба Франкліна · Гамма-HCD
zhγ重莲病Franklin病
trGama ağır zincir hastalığıGama-HCD · Franklin hastalığı

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10C88.2NTBTinclusionvalidated
ICD-112A84.1Especificvalidated
MONDO0015046Evalidated
UMLSC0018854Evalidated
GARD10346Evalidated

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 (1):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families120 casesWorldwideCase(s)Validated[EXPERT]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

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

20 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0004332Abnormal lymphocyte morphology
HP:0005561Abnormality of bone marrow cell morphology
HP:0012378Fatigue
HP:0001945Fever
Frequent (79-30%)
HP:0001903Anemia
HP:0002240Hepatomegaly
HP:0002716Lymphadenopathy
HP:0100648Neoplasm of the tongue
HP:0000988Skin rash
HP:0001744Splenomegaly
Occasional (29-5%)
HP:0000174Abnormal palate morphology
HP:0001890Autoimmune hemolytic anemia
HP:0001973Autoimmune thrombocytopenia
HP:0002960Autoimmunity
HP:0002015Dysphagia
HP:0002797Osteolysis
HP:0009830Peripheral neuropathy
HP:0002205Recurrent respiratory infections
HP:0001370Rheumatoid arthritis
HP:0001873Thrombocytopenia

Run the differential on the 4 obligate / very frequent terms

7

Sources for this card