Ichthyosis and erythrokeratoderma
Gene: RSPO1Comment on phenotypes: Previous phenotypes:
palmoplantar keratoderma;Palmoplantar hyperkeratosis with squamous cell carcinoma of skin and sex reversal, 610644;Palmoplantar hyperkeratosis and true hermaphroditism, 610644Created: 23 Mar 2021, 3:39 p.m. | Last Modified: 23 Mar 2021, 3:39 p.m.
Panel Version: 1.47
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
palmoplantar keratoderma; SCC of skin; sex reversal
Comment on list classification: Updated rating from Amber to Green: 1 green review plus sufficient (3) cases to support causation of PPK phenotype.Created: 20 Mar 2017, 12:36 p.m.
Comment on list classification: Updated rating from Red to Amber ready for external review. 3 unrelated cases of RSPO1 mutations linked to OMIM:610644.Created: 10 Jan 2017, 4:45 p.m.
In a 40-year-old 46, XX SRY-negative woman with true hermaphroditism and palmoplantar keratoderma (OMIM:610644), whose parents were first cousins, Tomaselli et al. (2008, PMID:18085567) identified homozygosity for a 286+1G-A transition altering the splice donor site in intron 5 of the RSPO1 gene.Created: 10 Jan 2017, 4:42 p.m.
In a sporadic case of palmoplantar hyperkeratosis with squamous cell carcinoma of skin and sex reversal (610644), Parma et al. (2006) identified a homozygous deletion of 2,752 bp, including exon 4 and part of the adjacent introns.
Created: 10 Jan 2017, 4:41 p.m.
In a consanguineous family from southern Italy affected by palmoplantar hyperkeratosis with squamous cell carcinoma of skin and sex reversal (610644), Parma et al. (2006, PMID:17041600) found a homozygous 1 bp insertion (896G) in the RSPO1 gene. The mutation resulted in a frameshift and stop codon after 10 amino acids.
Created: 10 Jan 2017, 4:41 p.m.
Phenotypes for gene: RSPO1 were changed from palmoplantar keratoderma; Palmoplantar hyperkeratosis with squamous cell carcinoma of skin and sex reversal, 610644; Palmoplantar hyperkeratosis and true hermaphroditism, 610644 to Palmoplantar hyperkeratosis with squamous cell carcinoma of skin and sex reversal, OMIM:610644; Palmoplantar hyperkeratosis and true hermaphroditism, OMIM:610644
gene: RSPO1 was added gene: RSPO1 was added to Ichthyosis and erythrokeratoderma. Sources: Expert Review Green Mode of inheritance for gene: RSPO1 was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: RSPO1 were set to palmoplantar keratoderma; Palmoplantar hyperkeratosis with squamous cell carcinoma of skin and sex reversal, 610644; Palmoplantar hyperkeratosis and true hermaphroditism, 610644