Thomsen and Becker disease

Synonyms:	Batten-Turner congenital myopathy; myopathy, congenital; Myotonia congenita; myotonia congenita
Modes of inheritance:	Autosomal recessive inheritance MedGen UID: 141025 •Concept ID: C0441748 • Intellectual Product Source: Orphanet A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele). Autosomal dominant inheritance MedGen UID: 141047 •Concept ID: C0443147 • Intellectual Product Source: Orphanet A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele. Autosomal recessive inheritance (Orphanet) Autosomal dominant inheritance (Orphanet)

Monarch Initiative:	MONDO:0009710
Orphanet:	ORPHA614

Definition

A rare, genetic, skeletal muscle channelopathy characterized by slow muscle relaxation after contraction (myotonia). [from ORDO]

CClinical test, RResearch test, OOMIM, GGeneReviews, VClinVar