Kaleido Scope: A Discussion of Revised Diagnostic Criteria Released for NF1 and Legius Syndrome A Discussion of Revised Diagnostic Criteria Released for NF1 and Legius Syndrome Legius syndrome is a rare genetic disorder that was first described in 2007 [1]. It is also known as neurofibromatosis type 1-like syndrome [2]. Legius syndrome is classically characterised by multiple light-brown macules, known as café-au-lait macules [3].

Understanding the Context

Unlike neurofibromatosis type 1, there are no tumours found in Legius syndrome. Legius syndrome Patients with Legius syndrome have multiple café-au-lait macules (> 5mm in children and > 15 mm in adults). Axillary freckling less common. They may rarely have macrocephaly, cognitive disabilities, and several congenital malformations such as Noonan-like facies, pectus excavatum/carinatum, and lipomas.

Key Insights

McCune Albright syndrome What is McCune–Albright syndrome? McCune–Albright syndrome (MAS) is a rare condition that was first described in 1937. It is sometimes called Albright syndrome. The classic triad consists of 3 features: Patchy skin pigmentation Bone abnormalities Endocrine (hormonal) abnormalities, in particular early puberty At least 2 of these features need to be present to diagnose the condition. MAS is ...

Final Thoughts

Drug hypersensitivity syndrome, Drug reaction with eosinophilia and systemic symptoms, DRESS, Drug induced hypersensitivity syndrome, DIHS, DRESS syndrome. Authoritative facts from DermNet New Zealand. Ramsay Hunt syndrome, RHS, Ramsay Hunt disease, Herpes zoster oticus, Hunt syndrome, Geniculate ganglionitis. Authoritative facts about the skin from DermNet New Zealand. Stevens–Johnson syndrome / toxic epidermal necrolysis, Lyell syndrome, Erythema multiforme exudativum, Ectodermosis erosiva pluriorificialis. Authoritative facts from DermNet New Zealand.