Palmoplantar keratoderma 1, striate, focal, or diffuse

A dermatological disorder characterized by thickening of the skin on the palms and soles, and longitudinal hyperkeratotic lesions on the palms, running the length of each finger.

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

A 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.

Cataract 44

An opacification of the crystalline lens of the eye that frequently results in visual impairment or blindness. Opacities vary in morphology, are often confined to a portion of the lens, and may be static or progressive. In general, the more posteriorly located and dense an opacity, the greater the impact on visual function.

Pachyonychia congenita 3

An autosomal dominant genodermatosis characterized by hypertrophic nail dystrophy, painful and highly debilitating plantar keratoderma, oral leukokeratosis, and a variety of epidermal cysts.

IFAP syndrome 1, with or without Bresheck syndrome

An X-linked syndrome characterized by a peculiar triad of follicular ichthyosis, total or subtotal atrichia, and photophobia of varying degree. Histopathologically, the epidermal granular layer is generally well-preserved or thickened at the infundibulum. Hair follicles are poorly developed and tend to be surrounded by an inflammatory infiltrate. A subgroup of patients is described with lamellar rather than follicular ichthyosis. Non-consistent features may include growth and psychomotor retardation, aganglionic megacolon, seizures and nail dystrophy.

Erythrokeratodermia variabilis et progressiva 2

A form of erythrokeratodermia variabilis et progressiva, a genodermatosis characterized by the coexistence of two independent skin lesions: transient erythema and hyperkeratosis that is usually localized but occasionally occurs in its generalized form. Clinical presentation varies significantly within a family and from one family to another. Palmoplantar keratoderma is present in around 50% of cases.

Deafness, autosomal dominant, 28

A form of non-syndromic sensorineural hearing loss. Sensorineural deafness results from damage to the neural receptors of the inner ear, the nerve pathways to the brain, or the area of the brain that receives sound information. DFNA28 is characterized by mild to moderate hearing loss across most frequencies that progresses to severe loss in the higher frequencies by the fifth decade.

Cerebral dysgenesis, neuropathy, ichthyosis, and palmoplantar keratoderma syndrome

A neurocutaneous syndrome characterized by cerebral dysgenesis, neuropathy, ichthyosis and palmoplantar keratoderma.

Erythrokeratodermia variabilis et progressiva 5

A form of erythrokeratodermia variabilis et progressiva, a genodermatosis characterized by the coexistence of two independent skin lesions: transient erythema and hyperkeratosis that is usually localized but occasionally occurs in its generalized form. Clinical presentation varies significantly within a family and from one family to another. Palmoplantar keratoderma is present in around 50% of cases. EKVP5 inheritance is autosomal recessive.

Erythrokeratodermia variabilis et progressiva 1

A form of erythrokeratodermia variabilis et progressiva, a genodermatosis characterized by the coexistence of two independent skin lesions: transient erythema and hyperkeratosis that is usually localized but occasionally occurs in its generalized form. Clinical presentation varies significantly within a family and from one family to another. Palmoplantar keratoderma is present in around 50% of cases.

Ectodermal dysplasia 2, Clouston type

A form of ectodermal dysplasia, a heterogeneous group of disorders due to abnormal development of two or more ectodermal structures such as hair, teeth, nails and sweat glands, with or without any additional clinical sign. Each combination of clinical features represents a different type of ectodermal dysplasia. ECTD2 is an autosomal dominant condition characterized by atrichosis, nail hypoplasia and deformities, hyperpigmentation of the skin, normal teeth, normal sweat and sebaceous gland function. Palmoplantar hyperkeratosis is a frequent feature. Hearing impairment has been detected in few cases.

Odonto-onycho-dermal dysplasia

A rare autosomal recessive ectodermal dysplasia characterized by dry hair, severe hypodontia, smooth tongue with marked reduction of fungiform and filiform papillae, onychodysplasia, keratoderma and hyperhidrosis of palms and soles, and hyperkeratosis of the skin.

Keratoderma, palmoplantar, Bothnian type

A dermatological disorder characterized by diffuse non-epidermolytic hyperkeratosis of the skin of palms and soles. PPKB is frequently complicated by fungal infections.

Oculodentodigital dysplasia

A disease characterized by a typical facial appearance and variable involvement of the eyes, dentition, and fingers. Characteristic facial features include a narrow, pinched nose with hypoplastic alae nasi, prominent columella and thin anteverted nares together with a narrow nasal bridge, and prominent epicanthic folds giving the impression of hypertelorism. The teeth are usually small and carious. Typical eye findings include microphthalmia and microcornea. The characteristic digital malformation is complete syndactyly of the fourth and fifth fingers (syndactyly type III) but the third finger may be involved and associated camptodactyly is a common finding. Cardiac abnormalities are observed in rare instances.

Palmoplantar keratoderma and woolly hair

A disorder characterized by abnormal thickening of the skin on the palms and soles, in association with woolly scalp hair. Affected individuals manifest a variable degree of striate palmoplantar keratoderma, generally more severe on the soles. Leukonychia is more pronounced on the fingernails than toenails. Scalp hair, body hair, eyebrows, and eyelashes are sparse. The fifth toes show variable degrees of pseudoainhum, ranging from external rotation to a deep sulcus at the digitoplantar fold, accompanied by a bulbous appearance of the distal toe.

Tyrosinemia 2

An inborn error of metabolism characterized by elevations of tyrosine in the blood and urine, and oculocutaneous manifestations. Typical features include palmoplantar keratosis, painful corneal ulcers, and intellectual disability.

Tylosis with esophageal cancer

An autosomal dominant syndrome characterized by focal non-epidermolytic palmoplantar keratoderma, oral leukokeratosis, and a high lifetime risk of developing esophageal squamous cell carcinoma.

Palmoplantar keratoderma, non-epidermolytic, focal or diffuse

A dermatological disorder characterized by non-epidermolytic abnormal thickening of the skin on the palms and soles. Diffuse palmoplantar keratoderma is characterized by uniform involvement of the palmoplantar surface, while the focal form consists of localized areas of hyperkeratosis located mainly on pressure points and sites of recurrent friction.

Mal de Meleda

A rare autosomal recessive skin disorder, characterized by diffuse transgressive palmoplantar keratoderma with keratotic lesions extending onto the dorsa of the hands and the feet (transgrediens). Patients may have hyperhidrosis. Other features include perioral erythema, lichenoid plaques on the knees and the elbows, and nail abnormalities.

Keratoderma, palmoplantar, striate 2

A dermatological disorder characterized by thickening of the skin on the palms (linear pattern) and the soles (island-like pattern) and flexor aspect of the fingers. Abnormalities of the nails, the teeth and the hair are rarely present.

Papillon-Lefevre syndrome

An autosomal recessive disorder characterized by palmoplantar keratosis and severe periodontitis affecting deciduous and permanent dentitions and resulting in premature tooth loss. The palmoplantar keratotic phenotype vary from mild psoriasiform scaly skin to overt hyperkeratosis. Keratosis also affects other sites such as elbows and knees.

Progressive familial heart block 1B

A cardiac bundle branch disorder characterized by progressive alteration of cardiac conduction through the His-Purkinje system, with a pattern of a right bundle-branch block and/or left anterior hemiblock occurring individually or together. It leads to complete atrio-ventricular block causing syncope and sudden death.

Keratoderma, palmoplantar, with squamous cell carcinoma of skin and sex reversal

A recessive syndrome characterized by XX (female to male) SRY-independent sex reversal, palmoplantar hyperkeratosis and predisposition to squamous cell carcinoma of the skin.

Olmsted syndrome 1

An autosomal dominant, rare congenital disorder characterized by bilateral mutilating palmoplantar keratoderma and periorificial keratotic plaques with severe itching at all lesions. Diffuse alopecia, constriction of digits, and onychodystrophy have also been reported. Infections and squamous cell carcinomas can arise on the keratotic areas. The digital constriction may progress to autoamputation of fingers and toes.

Keratoderma, palmoplantar, punctate 1A

An autosomal dominant dermatological disorder characterized by multiple hyperkeratotic, centrally indented, papules that develop in early adolescence, or later, and are irregularly distributed on the palms and soles (other palmoplantar keratoses have mostly diffuse hyperkeratinization). In mechanically irritated areas, confluent plaques can be found. Interfamilial and intrafamilial severity shows broad variation. In some cases, PPKP1 is associated with the development of early- and late-onset malignancies, including squamous cell carcinoma.

Adermatoglyphia

An autosomal dominant condition characterized by the lack of epidermal ridges on the palms and soles, which results in the absence of fingerprints, and is associated with a reduced number of sweat gland openings and reduced sweating of palms and soles.

Pachyonychia congenita 4

An autosomal dominant genodermatosis characterized by hypertrophic nail dystrophy, painful and highly debilitating plantar keratoderma, oral leukokeratosis, and a variety of epidermal cysts.

Vohwinkel syndrome with ichthyosis

A variant form of Vohwinkel syndrome without hearing loss and associated with ichthyosiform dermatosis. Clinical features include palmoplantar keratoderma, pseudoainhum and ichthyosis. Compact hyperkeratosis with round retained nuclei and hypergranulosis is observed on skin biopsies.

Pachyonychia congenita 2

An autosomal dominant ectodermal dysplasia characterized by hypertrophic nail dystrophy resulting in onchyogryposis (thickening and increase in curvature of the nail), palmoplantar keratoderma and hyperhidrosis, follicular hyperkeratosis, multiple epidermal cysts, absent/sparse eyebrow and body hair, and by the presence of natal teeth.

Epidermolysis bullosa simplex 1A, generalized severe

A form of epidermolysis bullosa simplex, a group of skin fragility disorders characterized by skin blistering due to cleavage within the basal layer of keratinocytes, and erosions caused by minor mechanical trauma. There is a broad spectrum of clinical severity ranging from minor blistering on the feet, to subtypes with extracutaneous involvement and a lethal outcome. EBS1A is an autosomal dominant form characterized by generalized intraepidermal skin blistering that begins and is very prominent at birth. EBS1A may be life-threatening in the first year of life. Tendency to blistering diminishes in adolescence.

Congenital disorder of glycosylation 2L

A multisystem disorder caused by a defect in glycoprotein biosynthesis and characterized by under-glycosylated serum glycoproteins. Congenital disorders of glycosylation result in a wide variety of clinical features, such as defects in the nervous system development, psychomotor retardation, dysmorphic features, hypotonia, coagulation disorders, and immunodeficiency. The broad spectrum of features reflects the critical role of N-glycoproteins during embryonic development, differentiation, and maintenance of cell functions. Clinical features of CDG2L include neonatal intractable focal seizures, vomiting, loss of consciousness, intracranial bleeding due to vitamin K deficiency, and death in infancy.

Palmoplantar keratoderma, epidermolytic, 1

A form of epidermolytic palmoplantar keratoderma, a dermatological disorder characterized by diffuse thickening of the epidermis on the entire surface of palms and soles sharply bordered with erythematous margins. Some patients may present knuckle pads, thick pads of skin appearing over the proximal phalangeal joints. EPPK1 inheritance is autosomal dominant.

Vitiligo-associated multiple autoimmune disease 1

A disorder characterized by the association of vitiligo with several autoimmune and autoinflammatory diseases including autoimmune thyroid disease, rheumatoid arthritis and systemic lupus erythematosus.

Deafness, autosomal recessive, 1A

A form of non-syndromic sensorineural hearing loss. Sensorineural deafness results from damage to the neural receptors of the inner ear, the nerve pathways to the brain, or the area of the brain that receives sound information.

Keratitis-ichthyosis-deafness syndrome, autosomal recessive

An autosomal recessive form of keratitis-ichthyosis-deafness syndrome, a disease characterized by the association of hyperkeratotic skin lesions with vascularizing keratitis and profound sensorineural hearing loss. KIDAR patients manifest ichthyosis, failure to thrive and developmental delay in childhood, thrombocytopenia, photophobia, and progressive hearing loss. Low plasma copper and ceruloplasmin levels have been reported in some patients.

Epidermolytic hyperkeratosis 1

A skin disorder characterized by widespread blistering and an ichthyotic erythroderma at birth that persist into adulthood. Histologically there is a diffuse epidermolytic degeneration in the lower spinous layer of the epidermis. Within a few weeks from birth, erythroderma and blister formation diminish and hyperkeratoses develop. EHK1 inheritance is autosomal dominant or autosomal recessive.

Keratoderma, palmoplantar, Nagashima type

An autosomal recessive, non-syndromic, diffuse palmoplantar keratosis characterized by well-demarcated diffuse erythematous hyperkeratosis expanding onto the dorsal surfaces of the palms and feet and the Achilles tendon area. Hyperkeratosis is mild and non-progressive.

Pachyonychia congenita 1

An autosomal dominant ectodermal dysplasia characterized by hypertrophic nail dystrophy resulting in onchyogryposis (thickening and increase in curvature of the nail), palmoplantar keratoderma, follicular hyperkeratosis, and oral leukokeratosis. Hyperhidrosis of the hands and feet is usually present.

Erythrokeratodermia variabilis et progressiva 7

A form of erythrokeratodermia variabilis et progressiva, a genodermatosis characterized by the coexistence of two independent skin lesions: transient erythema and hyperkeratosis that is usually localized but occasionally occurs in its generalized form. Clinical presentation varies significantly within a family and from one family to another. Palmoplantar keratoderma is present in around 50% of cases. EKVP7 is an autosomal recessive form characterized by palmoplantar keratoderma that extends to the dorsal surface of the hands and feet, as well as erythematous annular skin lesions. Pruritus, woolly hair, and dystrophic nails may also be present.