Pyoderma means any skin disease that is pyogenic (has pus). These include superficial bacterial infections such as impetigo, impetigo contagiosa, ecthyma, folliculitis, Bockharts impetigo, furuncle, carbuncle, tropical ulcer, etc. Autoimmune conditions include pyoderma gangrenosum. Pyoderma affects more than 111 million children worldwide, making it one of the three most common skin disorders in children along with scabies and tinea. See also
List of cutaneous conditions

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They are caused by an abnormal function of the lysosomal enzymes, which blocks degradation of mucopolysaccharides and leads to accumulation of harmful byproducts, namely, heparan sulfate, dermatan sulfate, and keratan sulfate. The resulting cellular malfunction can lead to a diverse array of skeletal and visceral manifestations. MPS have been subcategorized according to the type of enzyme inadequacy and glycoprotein accumulated. Cleidocranial dysostosis
Cleidocranial dysostosis is a general skeletal condition named for the collarbone (cleido-) and cranium deformities which people with it often have. Common features include:
Partly or completely missing collarbones. A soft spot or larger soft area in the top of the head where the fontanelle failed to close. Bones and joints are underdeveloped. The permanent teeth include supernumerary teeth. Permanent teeth not erupting
Bossing (bulging) of the forehead. Hypertelorism

Fibrous dysplasia
Fibrous dysplasia causes bone thinning and growths or lesions in one or more bones of the human body. These lesions are tumor-like growths that consist of replacement of the medullary bone with fibrous tissue, causing the expansion and weakening of the areas of bone involved. Especially when involving the skull or facial bones, the lesions can cause externally visible deformities. The skull is often, but not necessarily, affected, and any other bones can be involved. Langer–Giedion syndrome
Langer–Giedion syndrome is a very rare genetic disorder caused by a deletion of chromosomal material. Diagnosis is usually made at birth or in early childhood.