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Disease Profile

Porokeratosis of Mibelli

Prevalence
Prevalence estimates on Rare Medical Network websites are calculated based on data available from numerous sources, including US and European government statistics, the NIH, Orphanet, and published epidemiologic studies. Rare disease population data is recognized to be highly variable, and based on a wide variety of source data and methodologies, so the prevalence data on this site should be assumed to be estimated and cannot be considered to be absolutely correct.

Unknown

Age of onset

Childhood

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ICD-10

Q82.8

Inheritance

Autosomal dominant A pathogenic variant in only one gene copy in each cell is sufficient to cause an autosomal dominant disease

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Autosomal recessive Pathogenic variants in both copies of each gene of the chromosome are needed to cause an autosomal recessive disease and observe the mutant phenotype

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X-linked
dominant X-linked dominant inheritance, sometimes referred to as X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome.

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X-linked
recessive Pathogenic variants in both copies of a gene on the X chromosome cause an X-linked recessive disorder

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Mitochondrial or multigenic Mitochondrial genetic disorders can be caused by changes (mutations) in either the mitochondrial DNA or nuclear DNA that lead to dysfunction of the mitochondria and inadequate production of energy.

Multigenic or multifactor Inheritance involving many factors, of which at least one is genetic but none is of overwhelming importance, as in the causation of a disease by multiple genetic and environmental factors.

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Not applicable

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Categories

Congenital and Genetic Diseases; Skin Diseases

Summary

Porokeratosis of Mibelli is a skin condition that usually develops in children or young adults. It begins as one or a few small, brownish bumps that grow into raised, bumpy patches. These patches slowly increase in size over time. The cause of this condition is unknown, though exposure to sunlight or other forms of radiation, genetic factors and a weakened immune system have been suggested as possible risk factors. Porokeratosis of Mibelli may sometimes harm normal tissue underlying the affected area; it may also develop into skin cancer. Treatment depends on the size, location, and aggressiveness of porokeratosis in each affected individual; it may include observation only, medication, or surgery.[1]

Symptoms

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Medical Terms Other Names
Learn More:
HPO ID
80%-99% of people have these symptoms
Aplasia/Hypoplasia of the skin
Absent/small skin
Absent/underdeveloped skin

[ more ]

0008065
Hyperkeratosis
0000962
Porokeratosis
0200044
30%-79% of people have these symptoms
Cutaneous photosensitivity
Photosensitive skin
Photosensitive skin rashes
Photosensitivity
Sensitivity to sunlight
Skin photosensitivity
Sun sensitivity

[ more ]

0000992
Neoplasm of the skin
Skin tumors
Tumor of the skin

[ more ]

0008069
Pruritus
Itching
Itchy skin
Skin itching

[ more ]

0000989
Percent of people who have these symptoms is not available through HPO
Abnormality of chromosome stability
0003220
Autosomal dominant inheritance
0000006
Middle age onset
0003596
Parakeratosis
0001036

Treatment

Treatment depends on the size, location, and aggressiveness of porokeratosis of Mibelli. Affected individuals are recommended to visit their personal physician regularly to watch for signs of skin cancer, limit sun exposure to the affected area, and use moisturizers as needed.[2] Imiquimod cream has been found to be an effective treatment, as has 5-fluorouracil cream. A group of medications called retinoids (including acitretin and isotretinoin), as a pill or cream, may be another treatment option.[2] If a skin cancer develops from porokeratosis of Mibelli, surgery is recommended.[1]

Learn more

These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

Where to Start

  • DermNet New Zealand is an online resource about skin diseases developed by the New Zealand Dermatological Society Incorporated. DermNet NZ provides information about this condition.

In-Depth Information

  • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Porokeratosis of Mibelli. Click on the link to view a sample search on this topic.

References

  1. Spencer LV . Porokeratosis. Medscape Reference. May 30, 2012; https://emedicine.medscape.com/article/1059123-overview#a0101. Accessed 8/21/2012.
  2. Sertznig P, von Felbert V, Megahed M. Porokeratosis: present concepts. Journal of the Academy of Dermatology and Venereology. 2012; 26:404-412. https://www.ncbi.nlm.nih.gov/pubmed/21929548. Accessed 8/16/2012.

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