RIN2 syndrome

RIN2 syndrome, formerly known as macrocephaly, alopecia, cutis laxa and scoliosis (MACS) syndrome, is a very rare inherited connective tissue disorder characterized by macrocephaly, sparse scalp hair, soft-redundant and hyperextensible skin, joint hypermobility, and scoliosis. Patients have progressive facial coarsening with downslanted palpebral fissures, upper eyelid fullness/infraorbital folds, thick/everted vermillion, gingival overgrowth and abnormal position of the teeth. Rarer manifestations such as abnormal high-pitched voice, bronchiectasis, hypergonadotropic hypergonadism and brachydactyly (see this term) have also been reported.

Macrocephaly

Occipitofrontal (head) circumference greater than 97th centile compared to appropriate, age matched, sex-matched normal standards. Alternatively, a apparently increased size of the cranium.

Total: 4

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PMID (PMCID)
28409271	FEMALE	Infant
	Unique presentation of cutis laxa with Leigh-like syndrome due to ECHS1 deficiency.
	Balasubramaniam S, Riley LG, Bratkovic D, Ketteridge D, Manton N, Cowley MJ, Gayevskiy V, Roscioli T, Mohamed M, Gardeitchik T, Morava E, Christodoulou J. J Inherit Metab Dis. 2017;40(5):745-747.
	Metabolic cutis laxa results from Menkes syndrome, caused by a defect in the ATPase copper transporting alpha (ATP7A) gene; congenital disorders of glycosylation due to mutations in subunit 7 of the component of oligomeric Golgi (COG7)-congenital disorders of glycosylation (CDG) complex; combined disorder of N- and O-linked glycosylation, due to mutations in ATPase H+ transporting V0 subunit a2 (ATP6VOA2) gene; pyrroline-5-carboxylate reductase 1 deficiency; pyrroline-5-carboxylate synthase deficiency; macrocephaly, alopecia, cutis laxa, and scoliosis (MACS) syndrome, due to Ras and Rab interactor 2 (RIN2) mutations; transaldolase deficiency caused by mutations in the transaldolase 1 (TALDO1) gene; Gerodermia osteodysplastica due to mutations in the golgin, RAB6-interacting (GORAB or SCYL1BP1) gene; and mitogen-activated pathway (MAP) kinase defects, caused by mutations in several genes [protein tyrosine phosphatase, non-receptor-type 11 (PTPN11), RAF, NF, HRas proto-oncogene, GTPase (HRAS), B-Raf proto-oncogene, serine/threonine kinase (BRAF), MEK1/2, KRAS proto-oncogene, GTPase (KRAS), SOS Ras/Rho guanine nucleotide exchange factor 2 (SOS2), leucine rich repeat scaffold protein (SHOC2), NRAS proto-oncogene, GTPase (NRAS), and Raf-1 proto-oncogene, serine/threonine kinase (RAF1)], which regulate the Ras-MAPK cascade.
27277385	MIXED_SAMPLE	Adult
	RIN2 syndrome: Expanding the clinical phenotype.
	Rosato S, Syx D, Ivanovski I, Pollazzon M, Santodirocco D, De Marco L, Beltrami M, Callewaert B, Garavelli L, Malfait F. Am J Med Genet A. 2016;170(9):2408-15.
	The condition was initially termed MACS syndrome (macrocephaly, alopecia, cutis laxa, and scoliosis), based on the clinical features of the first identified family; however, with the expansion of the clinical phenotype in additional families, it was subsequently coined RIN2 syndrome.
27277385	MIXED_SAMPLE	Adult
	RIN2 syndrome: Expanding the clinical phenotype.
	Rosato S, Syx D, Ivanovski I, Pollazzon M, Santodirocco D, De Marco L, Beltrami M, Callewaert B, Garavelli L, Malfait F. Am J Med Genet A. 2016;170(9):2408-15.
	The condition was initially termed MACS syndrome (macrocephaly, alopecia, cutis laxa, and scoliosis), based on the clinical features of the first identified family; however, with the expansion of the clinical phenotype in additional families, it was subsequently coined RIN2 syndrome.
20424861	MIXED_SAMPLE	Child
	The RIN2 syndrome: a new autosomal recessive connective tissue disorder caused by deficiency of Ras and Rab interactor 2 (RIN2).
	Syx D, Malfait F, Van Laer L, Hellemans J, Hermanns-Le T, Willaert A, Benmansour A, De Paepe A, Verloes A. Hum Genet. 2010;128(1):79-88.
	A new genodermatosis, termed macrocephaly, alopecia, cutis laxa and scoliosis (MACS) syndrome has been described, resulting from a homozygous 1-bp deletion in RIN2.