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Nagashima-type palmoplantar keratosis (NPPK) is a relatively common autosomal recessive dermatosis characterized by well-defined diffuse erythema and non-destructive hyperkeratosis on the palmoplantar areas, with swelling and whitening when exposed to water. The pathogenesis of NPPK can be attributable to altered structure and function of SERPINB7, environmental factors, barrier dysfunction and inflammatory response. There is no specific and standardized therapy for this disorder. Topical treatment is primary therapy although systemic drugs or surgery can be used for severe cases. Gentamicin, a targeted therapy for the disease, has shown some potential, but more clinical studies are still needed to verify its efficacy and safety. The aim of this review is to summarize the causative gene, pathogenesis and therapeutic strategies of NPPK. [ABSTRACT FROM AUTHOR]

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Spinal muscular atrophy is one rare type of autosomal recessive disorder. The disease is characterized by the progressive degeneration of spinal cord anterior horn motor neurons and brainstem motor nuclei, which leads to muscle atrophy and paralysis. One case of spinal muscular atrophy with open bite was reported here. [ABSTRACT FROM AUTHOR]