Q87.4: Marfan syndrome

You have a congenital connective tissue disease.

The disease is hereditary. Other family members may also be affected.

Connective tissue is found all over the body and fulfills various tasks. Connective tissue contains lots of fine fibers. Thus it can protect or stabilize organs. There is connective tissue beneath the skin and around muscles, for example. Tendons, ligaments and cartilage are also made of connective tissue. The condition can result in your connective tissue failing to develop properly. This means the connective tissue is not as firm as normal.

This disease can make you especially tall. If the connective tissue has not formed properly, you may have various symptoms. The joints can often be stretched more than other people’s. This means that the joints can be dislocated more often. Or one’s vision may be impaired. The aorta may also be dilated. The aorta begins at the heart itself. First it runs upwards and then it arches down through the chest to the abdomen. At around the level of the navel, the aorta branches into 2 large blood vessels. These blood vessels first run to the pelvis and then to the legs.

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.


Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).