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Disease Profile

Pacman dysplasia

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.
<1 / 1 000 000

< 331

US Estimated

< 514

Europe Estimated

Age of onset

Neonatal

ICD-10

Q77.8

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.

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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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Other names (AKA)

Pacman syndrome; Epiphyseal stippling with osteoclastic hyperplasia

Categories

Congenital and Genetic Diseases; Connective tissue diseases; Musculoskeletal Diseases

Summary

The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
orphanet

Orpha Number: 1952

Definition
A rare disorder characterized by epiphyseal stippling and osteoclastic overactivity. It has been described in less than 10 patients but may be underdiagnosed. It is characterized radiographically by severe stippling of the lower spine and long bones, and periosteal cloaking. Patients also have short metacarpals. The syndrome may be inherited as an autosomal recessive trait. This disorder should be included in the differential diagnosis of mucolipidosis type II. In order to make a definitive diagnosis, lysosomal storage should be investigated by electron microscopy, or enzyme assays should be performed. Familial recurrence can be easily detected by prenatal ultrasonography. This skeletal dysplasia is lethal.

Visit the Orphanet disease page for more resources.

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
Abnormality of calvarial morphology
Abnormality of the shape of cranium
Abnormally shaped skull

[ more ]

0002648
Coarse metaphyseal trabecularization
0100670
Coronal cleft vertebrae
0003417
Epiphyseal stippling
Speckled calcifications in end part of bone
0010655
Genu varum
Outward bow-leggedness
Outward bowing at knees

[ more ]

0002970
Hypotelorism
Abnormally close eyes
Closely spaced eyes

[ more ]

0000601
Lethal skeletal dysplasia
Lethal dwarfism identifiable at birth
0005716
Patent ductus arteriosus
0001643
Percent of people who have these symptoms is not available through HPO
Abnormality of metabolism/homeostasis
Laboratory abnormality
Metabolism abnormality

[ more ]

0001939
Autosomal dominant inheritance
0000006
Bowing of the long bones
Bowed long bones
Bowing of long bones

[ more ]

0006487

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.

In-Depth Information

  • 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 Pacman dysplasia. Click on the link to view a sample search on this topic.