Clinodactyly
Clinodactyly is a medical term describing the curvature of a digit (a finger or toe) in the plane of the palm, most commonly the fifth finger (the "little finger") towards the adjacent fourth finger (the "ring finger"). It is a fairly common isolated anomaly which often goes unnoticed, but also occurs in combination with other abnormalities in certain genetic syndromes, such as Down syndrome, Turner syndrome and Cornelia de Lange syndrome. In birds
Anisodactyly
Anisodactyly is the most common arrangement of digits in birds, with three toes forward and one back. This is common in songbirds  and other perching birds, as well as hunting birds like eagles, hawks, and falcons. This arrangement of digits help with perching and/or climbing and clinging. This occurs in Passeriformes, Columbiformes, Falconiformes, Accipitriformes, Galliformes and a vast majority of other birds. Syndactyly
Syndactyly, as it occurs in birds, is like anisodactyly, except that the third and fourth toes (the outer and middle forward-pointing toes), or three toes, are fused together, as in the belted kingfisher (Megaceryle alcyon). This is characteristic of Coraciiformes (kingfishers, bee-eaters, rollers, and relatives). Zygodactyly
Zygodactyly (from Greek ζυγος, even-numbered) is an arrangement of digits in birds and chameleons, with two toes facing forward (digits 2 and 3) and two back (digits 1 and 4). This arrangement is most common in arboreal species, particularly those that climb tree trunks or clamber through foliage. Zygodactyly occurs in the parrots, woodpeckers (including flickers), cuckoos (including roadrunners), and some owls.
Keratoderma is a hornlike skin condition. Classification
The keratodermas are classified into the following subgroups:: 506

Congenital
Simple keratodermas
Diffuse palmoplantar keratodermas
Diffuse epidermolytic palmoplantar keratoderma
Diffuse nonepidermolytic palmoplantar keratoderma
mal de Meleda
Focal palmoplantar keratoderma
Striate palmoplantar keratoderma
Punctate palmoplantar keratoderma
Keratosis punctata palmaris et plantaris
Spiny keratoderma
Focal acral hyperkeratosis
Complex keratodermas
Diffuse palmoplantar keratoderma
Erythrokeratodermia variabilis
Palmoplantar keratoderma of Sybert
Olmsted syndrome
Naegeli–Franceschetti–Jadassohn syndrome
Focal palmoplantar keratoderma
Papillon–Lefèvre syndrome
Pachyonychia congenita type I
Pachyonychia congenita type II
Focal palmoplantar keratoderma with oral mucosal hyperkeratosis
Camisa disease
Ectodermal dysplasias
Cloustons hidrotic ectodermal dysplasia
Acrokeratotic poikiloderma
Dermatopathic pigmentosa reticularis
Syndromic keratodermas
Vohwinkel syndrome
Palmoplantar keratoderma associated with esophageal cancer
Palmoplantar keratoderma and spastic paraplegia
Naxos disease
Striate palmoplantar keratoderma, woolly hair, and left ventricular dilated cardiomyopathy
Keratitis-ichthyosis-deafness syndrome
Corneodermatosseous syndrome
Huriez syndrome
Oculocutaneous tyrosinemia
Cardiofaciocutaneous syndrome
Schöpf–Schulz–Passarge syndrome

Acquired
Acquired keratodermas
AIDS-associated keratoderma
Arsenical keratoses
Calluses
Climacteric keratoderma
Clavi (Corns)
Eczema
Human papillomavirus
Keratoderma blenorrhagicum
Lichen planus
Norwegian scabies
Paraneoplastic keratoderma
Psoriasis
Reactive arthritis
Secondary syphilis
Tinea pedis
Sézary syndrome
Tuberculosis verrucosa cutis
Drug-induced keratoderma

See also
Palmoplantar keratoderma
Skin lesion
List of cutaneous conditions
List of conditions caused by problems with junctional proteins

References


== External links ==