Q93.1: Whole chromosome monosomy, mosaicism (mitotic nondisjunction)

The number of your chromosomes has changed.

Somatic cells usually hold a complete blueprint of your body. This blueprint consists of genetic information. The genetic information is encrypted in the chromosomes. In humans, somatic cells usually have 23 pairs of chromosome, so 46 chromosomes in all. There are two different types of chromosomes. They are autosomes and sex chromosomes. There are 22 pairs of autosomes per somatic cell, and the 2 remaining chromosomes are the sex chromosomes.

The chromosomes are passed on to the child by both parents. To this end, the chromosomes are in the mother's egg cell and the father's sperm cell. When the egg cell and the sperm cell merge, a new cell forms. Then, from this cell, the cells for a new body form.

With this disorder there are cells in your body in which all 22 autosomes are only present once. However, this does not affect all the cells in your body.

Additional indicator

On medical documents, the ICD code is often appended by letters that indicate the diagnostic certainty or the affected side of the body.

  • G: Confirmed diagnosis
  • V: Tentative diagnosis
  • Z: Condition after
  • A: Excluded diagnosis
  • L: Left
  • R: Right
  • B: Both sides

Further information


This information is not intended for self-diagnosis and does not replace professional medical advice from a doctor. If you find an ICD code on a personal medical document, please also note the additional indicator used for diagnostic confidence.
Your doctor will assist you with any health-related questions and explain the ICD diagnosis code to you in a direct consultation if necessary.


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