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Spontaneous tendon ruptures in alkaptonuria.

R V Manoj Kumar1, S Rajasekaran

  • 1Department of Orthopaedic and Spinal Surgery, Ganga Hospital, Coimbatore, India.

The Journal of Bone and Joint Surgery. British Volume
|August 23, 2003
PubMed
Summary

Alkaptonuria, a rare genetic disorder, can cause ochronosis, leading to joint degeneration. This study highlights spontaneous tendon ruptures as an early, previously unreported symptom of this condition.

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Area of Science:

  • Biochemistry
  • Genetics
  • Orthopedics

Background:

  • Alkaptonuria is a rare inherited metabolic disorder caused by deficiency of the enzyme homogentisate 1,2-dioxygenase.
  • This deficiency leads to the accumulation of homogentisic acid, causing ochronosis, a condition characterized by dark pigmentation of connective tissues.
  • Ochronosis primarily affects the musculoskeletal system, causing degenerative changes in the spine and joints.

Observation:

  • This report details three patients presenting with spontaneous ruptures of the patellar tendon or tendo Achillis.
  • These tendon ruptures were the initial clinical manifestation leading to the diagnosis of alkaptonuria.
  • This represents a previously undocumented presentation of the disease.

Findings:

  • The study identifies spontaneous tendon ruptures as a novel early symptom of alkaptonuria.
  • Four cases of spontaneous patellar tendon or tendo Achillis ruptures were observed in the three patients.
  • These findings suggest a significant role of ochronosis in the degeneration of tendons and ligaments.

Implications:

  • Early identification of alkaptonuria may be improved by considering spontaneous tendon ruptures as a presenting symptom.
  • This could lead to earlier diagnosis and management of alkaptonuria, potentially preventing more severe complications.
  • Further research into the mechanisms of tendon and ligament degeneration in ochronosis is warranted.

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