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Meiosis I01:49

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Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by a...
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Related Experiment Video

Updated: Jun 20, 2026

Microsatellite DNA Genotyping and Flow Cytometry Ploidy Analyses of Formalin-fixed Paraffin-embedded Hydatidiform Molar Tissues
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Multiple pilomatricomas in association with trisomy 9.

Bruno Blaya1, Rosario Gonzalez-Hermosa, Jesus Gardeazabal

  • 1Department of Dermatology, Cruces Hospital, Baracaldo, Vizcaya, Spain. 39144bba@comb.es

Pediatric Dermatology
|August 20, 2009
PubMed
Summary

Multiple pilomatricomas, a rare skin condition, are linked to genetic disorders. This study details a rare case associating multiple pilomatricomas with trisomy 9, suggesting a potential connection between these conditions.

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Area of Science:

  • Dermatology
  • Clinical Genetics
  • Rare Diseases

Background:

  • Multiple pilomatricomas are uncommon skin tumors with known associations to genetic syndromes like Gardner syndrome, myotonic dystrophy, and Rubinstein-Taybi syndrome.
  • Pilomatricomas arise from hair matrix cells and typically present as benign subcutaneous nodules.

Observation:

  • This report describes a unique case of a patient presenting with multiple pilomatricomas.
  • The patient was also diagnosed with trisomy 9, a chromosomal abnormality characterized by the presence of an extra copy of chromosome 9.

Findings:

  • This case represents the third documented instance in medical literature linking multiple pilomatricomas with trisomy 9.
  • The co-occurrence of these two rare conditions suggests a potential underlying pathogenetic relationship.

Implications:

  • The findings may prompt further investigation into the genetic factors contributing to pilomatricoma development, particularly in cases of chromosomal abnormalities.
  • Understanding this association could lead to improved diagnostic approaches and genetic counseling for patients with multiple pilomatricomas or trisomy 9.
  • This case highlights the importance of considering rare genetic conditions when encountering unusual presentations of common diseases.