Palmoplantar keratoderma - Revision history

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2025-04-08T20:26:10Z

CSV import

← Older revision		Revision as of 20:26, 8 April 2025
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			{{SI}}
			{{Infobox medical condition
			\| name = Palmoplantar keratoderma
			\| image = [[File:plantarkeratosis-01.jpg\|250px]]
			\| caption = Palmoplantar keratoderma on the soles of the feet
			\| synonyms = Keratosis palmoplantaris
			\| pronunciation =
			\| specialty = [[Dermatology]]
			\| symptoms = Thickening of the skin on the palms and soles
			\| complications = [[Infection]], [[pain]], [[blistering]]
			\| onset = Varies, often in childhood
			\| duration = Long-term
			\| causes = Genetic mutations, acquired factors
			\| risks = Family history, certain occupations
			\| diagnosis = [[Clinical examination]], [[genetic testing]]
			\| differential = [[Psoriasis]], [[eczema]], [[tinea pedis]]
			\| treatment = [[Emollients]], [[keratolytics]], [[retinoids]]
			\| medication = [[Acitretin]], [[topical steroids]]
			\| frequency = Rare
			\| deaths = Rarely life-threatening
			}}
	== '''Alternate names''' ==		== '''Alternate names''' ==
	Keratoderma, Palmoplantar		Keratoderma, Palmoplantar

	== '''Definition''' ==		== '''Definition''' ==
	Palmoplantar keratoderma (PPK) is a group of skin conditions characterized by thickening of the skin on the palms of the hands and soles of the feet. PPK can also be a feature of various underlying syndromes.		Palmoplantar keratoderma (PPK) is a group of skin conditions characterized by thickening of the skin on the palms of the hands and soles of the feet. PPK can also be a feature of various underlying syndromes.
	[[File:Palmoplantet keratoderma new photo.jpg\|thumb]]		[[File:Palmoplantet keratoderma new photo.jpg\|left\|thumb]]
	[[File:Planter keratodermaC.jpg\|thumb]]		[[File:Planter keratodermaC.jpg\|left\|thumb]]

	<youtube>		<youtube>
	title='''{{PAGENAME}}'''		title='''{{PAGENAME}}'''
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	</youtube>		</youtube>

	== '''Cause''' ==		== '''Cause''' ==
	* Palmoplantar keratoderma (PPK) can be either acquired during the lifetime (more commonly) or inherited.		* Palmoplantar keratoderma (PPK) can be either acquired during the lifetime (more commonly) or inherited.
	* Acquired PPK may arise due to changes in a person's health or environment.		* Acquired PPK may arise due to changes in a person's health or environment.
	* Inherited forms of PPK are caused by genetic mutations that result in abnormalities of keratin (a skin protein).		* Inherited forms of PPK are caused by genetic mutations that result in abnormalities of keratin (a skin protein).
	* These forms of PPK may be present in more than one family member.		* These forms of PPK may be present in more than one family member.
	* Mutations in several genes can cause an inherited form of PPK.		* Mutations in several genes can cause an inherited form of PPK.

	== '''Inheritance''' ==		== '''Inheritance''' ==
	Depending on the gene involved, inheritance can be [[autosomal dominant]] or [[autosomal recessive]].		Depending on the gene involved, inheritance can be [[autosomal dominant]] or [[autosomal recessive]].
	[[Autosomal dominant]] inheritance means that having a mutation in only one copy of the responsible gene in each cell is enough to cause features of the condition. In some cases, an affected person inherits the mutated gene from an affected parent. In other cases, the mutation occurs for the first time in a person with no family history of the condition. This is called a de novo mutation. When a person with a mutation that causes an autosomal dominant condition has children, each child has a 50% (1 in 2) chance to inherit that mutation. For this reason, it is not uncommon for an autosomal dominant condition to be present in more than one generation in a family.		[[Autosomal dominant]] inheritance means that having a mutation in only one copy of the responsible gene in each cell is enough to cause features of the condition. In some cases, an affected person inherits the mutated gene from an affected parent. In other cases, the mutation occurs for the first time in a person with no family history of the condition. This is called a de novo mutation. When a person with a mutation that causes an autosomal dominant condition has children, each child has a 50% (1 in 2) chance to inherit that mutation. For this reason, it is not uncommon for an autosomal dominant condition to be present in more than one generation in a family.

	[[Autosomal recessive]] inheritance means that to be affected, a person must have a mutation in both copies of the responsible gene in each cell. Affected people inherit one mutated copy of the gene from each parent, who is referred to as a carrier. Carriers of an autosomal recessive condition typically do not have any signs or symptoms (they are unaffected). When 2 carriers of an autosomal recessive condition have children, each child has a:		[[Autosomal recessive]] inheritance means that to be affected, a person must have a mutation in both copies of the responsible gene in each cell. Affected people inherit one mutated copy of the gene from each parent, who is referred to as a carrier. Carriers of an autosomal recessive condition typically do not have any signs or symptoms (they are unaffected). When 2 carriers of an autosomal recessive condition have children, each child has a:
	* 25% chance to be affected		* 25% chance to be affected
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	* 25% chance to be unaffected and not a carrier		* 25% chance to be unaffected and not a carrier
	A person with an autosomal recessive condition can have an affected child only if the child's other parent is at least a carrier of the same condition. In most cases, autosomal recessive conditions affect only one generation in a family, such as siblings.		A person with an autosomal recessive condition can have an affected child only if the child's other parent is at least a carrier of the same condition. In most cases, autosomal recessive conditions affect only one generation in a family, such as siblings.

	== '''Signs and symptoms''' ==		== '''Signs and symptoms''' ==
	* This condition characterized by thickening of the skin on the palms of the hands and soles of the feet.		* This condition characterized by thickening of the skin on the palms of the hands and soles of the feet.
	* PPK can also be a feature of various underlying syndromes.		* PPK can also be a feature of various underlying syndromes.
	* In rare forms of PPK, organs other than the skin may also be affected.		* In rare forms of PPK, organs other than the skin may also be affected.

	== '''Diagnosis''' ==		== '''Diagnosis''' ==
	* Diagnosis of palmoplantar keratoderma (PPK) may involve a clinical exam, evaluating the medical and family history, histopathology (viewing tissue from a skin [[biopsy]] under a microscope), and [[genetic testing]] (if hereditary PPK is suspected).		* Diagnosis of palmoplantar keratoderma (PPK) may involve a clinical exam, evaluating the medical and family history, histopathology (viewing tissue from a skin [[biopsy]] under a microscope), and [[genetic testing]] (if hereditary PPK is suspected).
	* In addition to identifying thickened skin on the palms of the hands and soles of the feet, an exam is needed to check for involvement of other areas of the skin; the nails, hair, and teeth; and other organs of the body.		* In addition to identifying thickened skin on the palms of the hands and soles of the feet, an exam is needed to check for involvement of other areas of the skin; the nails, hair, and teeth; and other organs of the body.
	* Distinguishing between acquired and hereditary PPK is important.		* Distinguishing between acquired and hereditary PPK is important.
	* Acquired PPK usually occurs later in life and may be due to many causes, such as drugs, malnutrition, chemicals, systemic disease, cancer, and infection.		* Acquired PPK usually occurs later in life and may be due to many causes, such as drugs, malnutrition, chemicals, systemic disease, cancer, and infection.
	* The family history may be helpful in identifying hereditary PPK and establishing the inheritance pattern.		* The family history may be helpful in identifying hereditary PPK and establishing the inheritance pattern.
	* Lack of a family history is not necessarily evidence of acquired PPK.		* Lack of a family history is not necessarily evidence of acquired PPK.
	* Autosomal recessive PPK can appear sporadically from unaffected parent carriers, and autosomal dominant PPK can also occur sporadically due to a new mutation in an affected person (a de novo mutation).		* Autosomal recessive PPK can appear sporadically from unaffected parent carriers, and autosomal dominant PPK can also occur sporadically due to a new mutation in an affected person (a de novo mutation).
	* Histopathology of a [[biopsy]] from affected skin should be part of the diagnostic workup.		* Histopathology of a [[biopsy]] from affected skin should be part of the diagnostic workup.
	* This may show more specific features characteristic of a subtype of PPK.		* This may show more specific features characteristic of a subtype of PPK.
	* Distinguishing between epidermolytic and nonepidermolytic forms of PPK is helpful for treatment options, as epidermolytic forms tend to worsen on systemic [[Retinoid\|retinoids]].		* Distinguishing between epidermolytic and nonepidermolytic forms of PPK is helpful for treatment options, as epidermolytic forms tend to worsen on systemic [[Retinoid\|retinoids]].
	* Histopathology is also needed to rule out other conditions with overlapping features.		* Histopathology is also needed to rule out other conditions with overlapping features.
	* [[Genetic testing]] allows for a precise diagnosis as well as counseling with regard to the inheritance pattern and risk of recurrence.		* [[Genetic testing]] allows for a precise diagnosis as well as counseling with regard to the inheritance pattern and risk of recurrence.

	== '''Treatment''' ==		== '''Treatment''' ==
	* Treatment of both hereditary and acquired palmoplantar keratodermas (PPK) is difficult.		* Treatment of both hereditary and acquired palmoplantar keratodermas (PPK) is difficult.
	* The goal of treatment is to soften the thickened skin and make it less noticeable.		* The goal of treatment is to soften the thickened skin and make it less noticeable.
	* In many cases, treatment only results in short-term improvement and often has unwanted side effects.		* In many cases, treatment only results in short-term improvement and often has unwanted side effects.
	* For people with acquired PPK, it is important to screen for systemic illnesses, infections, culprit drugs, and [[neoplasia]] (tumor formation).		* For people with acquired PPK, it is important to screen for systemic illnesses, infections, culprit drugs, and [[neoplasia]] (tumor formation).
	* Treating the underlying condition or stopping possible triggers is the most effective treatment for acquired PPK.		* Treating the underlying condition or stopping possible triggers is the most effective treatment for acquired PPK.

	Treatment options may depend on the specific type of PPK a person has and may include:		Treatment options may depend on the specific type of PPK a person has and may include:
	* Saltwater soaks		* Saltwater soaks

Prab at 01:20, 3 September 2023

2023-09-03T01:20:08Z

New page

== '''Alternate names''' ==
Keratoderma, Palmoplantar

== '''Definition''' ==
Palmoplantar keratoderma (PPK) is a group of skin conditions characterized by thickening of the skin on the palms of the hands and soles of the feet. PPK can also be a feature of various underlying syndromes.
[[File:Palmoplantet keratoderma new photo.jpg|thumb]]
[[File:Planter keratodermaC.jpg|thumb]]

<youtube>
title='''{{PAGENAME}}'''
movie_url=http://www.youtube.com/v/=XgMGtfLldqo
embed_source_url=http://www.youtube.com/v/=XgMGtfLldqo
&rel=1
wrap = yes
width=750
height=600
</youtube>

== '''Cause''' ==
* Palmoplantar keratoderma (PPK) can be either acquired during the lifetime (more commonly) or inherited.
* Acquired PPK may arise due to changes in a person's health or environment.
* Inherited forms of PPK are caused by genetic mutations that result in abnormalities of keratin (a skin protein).
* These forms of PPK may be present in more than one family member.
* Mutations in several genes can cause an inherited form of PPK.

== '''Inheritance''' ==
Depending on the gene involved, inheritance can be [[autosomal dominant]] or [[autosomal recessive]].
[[Autosomal dominant]] inheritance means that having a mutation in only one copy of the responsible gene in each cell is enough to cause features of the condition. In some cases, an affected person inherits the mutated gene from an affected parent. In other cases, the mutation occurs for the first time in a person with no family history of the condition. This is called a de novo mutation. When a person with a mutation that causes an autosomal dominant condition has children, each child has a 50% (1 in 2) chance to inherit that mutation. For this reason, it is not uncommon for an autosomal dominant condition to be present in more than one generation in a family.

[[Autosomal recessive]] inheritance means that to be affected, a person must have a mutation in both copies of the responsible gene in each cell. Affected people inherit one mutated copy of the gene from each parent, who is referred to as a carrier. Carriers of an autosomal recessive condition typically do not have any signs or symptoms (they are unaffected). When 2 carriers of an autosomal recessive condition have children, each child has a:
* 25% chance to be affected
* 50% chance to be an unaffected carrier like each parent
* 25% chance to be unaffected and not a carrier
A person with an autosomal recessive condition can have an affected child only if the child's other parent is at least a carrier of the same condition. In most cases, autosomal recessive conditions affect only one generation in a family, such as siblings.

== '''Signs and symptoms''' ==
* This condition characterized by thickening of the skin on the palms of the hands and soles of the feet.
* PPK can also be a feature of various underlying syndromes.
* In rare forms of PPK, organs other than the skin may also be affected.

== '''Diagnosis''' ==
* Diagnosis of palmoplantar keratoderma (PPK) may involve a clinical exam, evaluating the medical and family history, histopathology (viewing tissue from a skin [[biopsy]] under a microscope), and [[genetic testing]] (if hereditary PPK is suspected).
* In addition to identifying thickened skin on the palms of the hands and soles of the feet, an exam is needed to check for involvement of other areas of the skin; the nails, hair, and teeth; and other organs of the body.
* Distinguishing between acquired and hereditary PPK is important.
* Acquired PPK usually occurs later in life and may be due to many causes, such as drugs, malnutrition, chemicals, systemic disease, cancer, and infection.
* The family history may be helpful in identifying hereditary PPK and establishing the inheritance pattern.
* Lack of a family history is not necessarily evidence of acquired PPK.
* Autosomal recessive PPK can appear sporadically from unaffected parent carriers, and autosomal dominant PPK can also occur sporadically due to a new mutation in an affected person (a de novo mutation).
* Histopathology of a [[biopsy]] from affected skin should be part of the diagnostic workup.
* This may show more specific features characteristic of a subtype of PPK.
* Distinguishing between epidermolytic and nonepidermolytic forms of PPK is helpful for treatment options, as epidermolytic forms tend to worsen on systemic [[Retinoid|retinoids]].
* Histopathology is also needed to rule out other conditions with overlapping features.
* [[Genetic testing]] allows for a precise diagnosis as well as counseling with regard to the inheritance pattern and risk of recurrence.

== '''Treatment''' ==
* Treatment of both hereditary and acquired palmoplantar keratodermas (PPK) is difficult.
* The goal of treatment is to soften the thickened skin and make it less noticeable.
* In many cases, treatment only results in short-term improvement and often has unwanted side effects.
* For people with acquired PPK, it is important to screen for systemic illnesses, infections, culprit drugs, and [[neoplasia]] (tumor formation).
* Treating the underlying condition or stopping possible triggers is the most effective treatment for acquired PPK.

Treatment options may depend on the specific type of PPK a person has and may include:
* Saltwater soaks
* [[Emollient|Emollients]]
* Paring (cutting away layers of skin)
* Topical [[Keratolytic|keratolytics]] (useful for people with limited keratoderma)
* Topical [[Retinoid|retinoids]] (this is often limited by skin irritation)
* Systemic retinoids ([[acitretin]])
* Topical vitamin D ointment ([[calcipotriol]])
* Surgery to remove the skin, followed by skin grafting
* Potent topical steroids with or without [[Keratolytic|keratolytics]] in cases with an inflammatory component
* [[Psoralens]] and [[Ultraviolet A radiation|ultraviolet A]] ([[PUVA]]) or re-PUVA (a combination of oral retinoids and PUVA) in some people with PPK secondary to [[psoriasis]] or [[eczema]]
* Currently, to our knowledge, there is no way to prevent PPK in a person who has inherited PPK but has not yet developed symptoms.
{{Cutaneous ketatosis, ulcer, atrophy, necrobiosis, and vasculitis}}
{{Congenital malformations and deformations of integument}}
{{stub}}
[[Category:Palmoplantar keratodermas| ]]
[[Category:Foot diseases]]