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Spiegler-Brooke syndrome

Brooke-Spiegler syndrome is an autosomal dominant disorder classically characterized by the appearance of multiple skin appendage tumors such as cylindroma, trichoepithelioma, and spiradenoma. These tumors are typically located in the head and neck region, appear in early adulthood, and gradually increase in size and number throughout life (Scheinfeld et al., 2003). Because BRSS, familial cylindromatosis, and MFT1 are allelic, and because different manifestations of each have been described within a single family, many consider these disorders to represent a phenotypic spectrum of a single disease entity (Gerretsen et al., 1995; Lee et al., 2005; Bowen et al., 2005; Young et al., 2006; Saggar et al., 2008). Blake and Toro (2009) provided a review of Brooke-Spiegler syndrome and pathogenic mutations in the CYLD gene. [from OMIM]

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Sebastian syndrome

MYH9-related disorders (MYH9RD) are characterized by large platelets (i.e., >40% of platelets >3.9 µm in diameter) and thrombocytopenia (platelet count <150 x 10(9)/L), both of which are present from birth. MYH9RD is variably associated with young-adult onset of progressive sensorineural hearing loss, presenile cataract, elevation of liver enzymes, and renal disease manifesting initially as glomerular nephropathy. Before identification of the gene in which mutation is causative, MYH9, individuals with MYH9RD were diagnosed as having Epstein syndrome, Fechtner syndrome, May-Hegglin anomaly, or Sebastian syndrome based on the combination of different clinical findings at the time of diagnosis. However, the realization that they all are due to heterozygous pathogenic variants in MYH9 and that the clinical findings often worsen throughout life as a result of late onset of non-hematologic manifestations has led the four conditions to be regarded as one disorder, now known as MYH9RD. [from GeneReviews]

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