Cutis laxa, autosomal recessive, 1B

A connective tissue disorder characterized by loose, hyperextensible skin with decreased resilience and elasticity leading to a premature aged appearance. Face, hands, feet, joints, and torso may be differentially affected. The clinical spectrum of autosomal recessive cutis laxa is highly heterogeneous with respect to organ involvement and severity. ARCL1B features include emphysema, lethal pulmonary artery occlusion, aortic aneurysm, cardiopulmonary insufficiency, birth fractures, arachnodactyly, and fragility of blood vessels.

Doyne honeycomb retinal dystrophy

An autosomal dominant, progressive, ocular disorder characterized by yellow-white deposits known as drusen that accumulate beneath the retinal pigment epithelium. With age, drusen increase in size and number, and eventually cause visual symptoms, including decreased visual acuity, metamorphopsia, photophobia, and paracentral scotoma.

Charcot-Marie-Tooth disease, demyelinating, type 1H

An autosomal dominant demyelinating form of Charcot-Marie-Tooth disease, a disorder of the peripheral nervous system, characterized by progressive weakness and atrophy, initially of the peroneal muscles and later of the distal muscles of the arms. Charcot-Marie-Tooth disease is classified in two main groups on the basis of electrophysiologic properties and histopathology: primary peripheral demyelinating neuropathies (designated CMT1 when they are dominantly inherited) and primary peripheral axonal neuropathies (CMT2). Demyelinating neuropathies are characterized by severely reduced nerve conduction velocities (less than 38 m/sec), segmental demyelination and remyelination with onion bulb formations on nerve biopsy, slowly progressive distal muscle atrophy and weakness, absent deep tendon reflexes, and hollow feet. CMT1H is characterized by peripheral sensorimotor neuropathy with onset usually in adulthood. Affected individuals present with foot deformities, upper or lower limb sensory disturbances, and motor deficits, mainly impaired gait. Rare patients may have hyperelastic skin or develop age-related macular degeneration.

Cutis laxa, autosomal recessive, 2E

A form of cutis laxa, a disorder characterized by an excessive congenital skin wrinkling, a large fontanelle with delayed closure, a typical facial appearance with downslanting palpebral fissures, and a general connective tissue weakness. ARCL2E patients present with cutis laxa, inguinal hernia, craniofacial dysmorphology, variable heart defects, and prominent skeletal features including craniosynostosis, short stature, brachydactyly, and syndactyly.