Mondo Description Lethal congenital contracture syndrome type 3 is a rare arthrogryposis syndrome characterized by clinical features identical to Lethal congenital contracture syndrome type 2 (i.e. multiple congenital contactures (typically extended elbows and flexed knees), micrognathia, anterior horn cells degeneration, skeletal muscle atrophy (mainly in the lower limbs), in the absence of hydrops, pterygia or bone fractures), but without bladder enlargement.

Uniprot Description A form of lethal congenital contracture syndrome, an autosomal recessive disorder characterized by degeneration of anterior horn neurons, extreme skeletal muscle atrophy, and congenital non-progressive joint contractures (arthrogryposis). The contractures can involve the upper or lower limbs and/or the vertebral column, leading to various degrees of flexion or extension limitations evident at birth. LCCS3 patients present at birth with severe multiple joint contractures and severe muscle wasting and atrophy, mainly in the legs. Death occurs minutes to hours after birth due to respiratory insufficiency. The phenotype can be distinguished from that of LCCS1 by the absence of hydrops, fractures and multiple pterygia, and from LCCS2 by the absence of neurogenic bladder defect.