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Schöpf-Schulz-Passarge syndrome (SSPS) is a rare autosomal recessive ectodermal dysplasia characterized by multiple eyelid apocrine hidrocystomas, palmoplantar keratoderma, hypotrichosis, hypodontia and nail dystrophy.
ORPHA:50944Classification level: Disorder
- Eccrine tumors-ectodermal dysplasia
- Keratosis palmoplantaris-cystic eyelids-hypodontia-hypotrichosis syndrome
- Palmoplantar hyperkeratosis-cystic eyelids-hypodontia-hypotrichosis syndrome
- Palmoplantar keratoderma-cystic eyelids-hypodontia-hypotrichosis syndrome
- Prevalence: <1 / 1 000 000
- Inheritance: Autosomal dominant or Autosomal recessive
- Age of onset: Childhood, Adolescent
- ICD-10: Q82.8
- OMIM: 224750
- UMLS: C1857069
- MeSH: -
- GARD: -
- MedDRA: -
More than 25 cases with SSPS have been described so far.
SSPS refers to a discrete phenotype of ectodermal dysplasia with a relatively benign course and late diagnosis, often established in adulthood. The onset of symptoms occurs in childhood and early adolescence, but they consist of relatively unspecific features, including various degrees of hypodontia, hypotrichosis, palmoplantar keratoderma and nail dystrophy. Telangiectatic rosacea is a further relatively common feature. Multiple eyelid apocrine hidrocystomas commonly appear in (late) adulthood. Palmoplantar keratoderma with histologic features of eccrine syringofibroadenoma is observed in nearly half of cases and occasionally develops a malignant potential. Other adnexal tumors described include basal cell carcinoma, eccrine poroma, benign acanthoma and follicular infundibulum tumor. Some patients have been described to have a bird-like facies. Within the WNT10A mutational spectrum, odonto-onycho-dermal dysplasia and SSPS are regarded as discrete entities, while an increasing number of patients are described with incomplete phenotypes of the odonto-onychial, tricho-odonto and tricho-odonto-onychial types.
SSPS is due to homozygous or compound heterozygous mutations in WNT10A. Incomplete/localized disease expression in heterozygous carriers and multiple instances of consanguinity occasionally lead to a pseudodominant transmission.
Transmission is autosomal recessive.