raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3162

Sézary syndrome

Synonyms: Sézary lymphoma

Type
Disease
Group
Disorder
Inheritance
Multigenic/multifactorial, Not applicable
Age of onset
Adult
Status
active

Sézary syndrome (SS) is an aggressive form of cutaneous T-cell lymphoma characterized by a triad of erythroderma, lymphadenopathy and circulating atypical lymphocytes (Sézary cells).

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSézary syndromeSézary lymphoma
frSyndrome de SézaryLymphome de Sézary
deSézary-SyndromSézary-Lymphom
esSíndrome de SezaryLinfoma de Sezary
itSindrome di SézaryLinfoma di Sézary
nlSyndroom van SézarySézary-lymfoom
ptSíndrome SezaryLinfoma de Sezary
plZespół Sezary'egoChłoniak Sézary'ego
csSézaryho syndromSézaryho lymfom
ukСиндром СезаріЛімфома Сезарі
zhSúzary综合征Sézary 淋巴瘤
trSézary sendromuSézary lenfoma

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10C84.1NTBTattributedvalidated
ICD-112B02Especificvalidated
MONDO0017844Evalidated
MeSHD012751Evalidated
UMLSC0036920Evalidated
GARD7629Evalidated
MedDRA10040493Evalidated

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

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
TNFRSF1BDisease-causing somatic mutation(s) inAssessedHGNC:11917ENSG000000281371911911p36.22TNF receptor superfamily member 1B26258847[PMID]
CD28Part of a fusion gene inAssessedHGNC:1653ENSG000001785621867602q33.2CD28 molecule26258847[PMID]
CTLA4Part of a fusion gene inAssessedHGNC:2505ENSG000001635991238902q33.2cytotoxic T-lymphocyte associated protein 426258847[PMID]
5

Prevalence and incidence

3 records
TypeClassValueAreaQualificationValidationSource
Annual incidence<1 / 1 000 0000.02 / 100 000United StatesValue and classValidated17638728[PMID]_National Cancer OTHERitute[OTHER]_ORPHANET
Annual incidence<1 / 1 000 0000.012 / 100 000NorwayValue and classValidated18808419[PMID]_ ORPHANET_[EXPERT]
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 2024-09-20
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002843Abnormal T cell morphology
HP:0004332Abnormal lymphocyte morphology
HP:0012192Cutaneous T-cell lymphoma
HP:0000958Dry skin
HP:0001019Erythroderma
HP:0100725Lichenification
HP:0002716Lymphadenopathy
HP:0002665Lymphoma
HP:0008069Neoplasm of the skin
HP:0000989Pruritus
Frequent (79-30%)
HP:0001596Alopecia
HP:0002240Hepatomegaly
HP:0002721Immunodeficiency
HP:0033221Increased CD4:CD8 ratio
HP:0008404Nail dystrophy
HP:0000982Palmoplantar keratoderma
HP:0001744Splenomegaly
Occasional (29-5%)
HP:0010701Abnormal immunoglobulin level
HP:0002103Abnormality of the pleura
HP:0025143Chills
HP:0000656Ectropion
HP:0000969Edema
HP:0100758Gangrene
HP:0002045Hypothermia
HP:0007400Irregular hyperpigmentation
HP:0009830Peripheral neuropathy
HP:0025144Shivering
HP:0003202Skeletal muscle atrophy
HP:0001337Tremor

Run the differential on the 10 obligate / very frequent terms

Annotation source: 27704468[PMID]_30525758[PMID]_32017375[PMID]_37105561[PMID]_29763049[PMID]

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Sources for this card