Alkaptonuria: Spontaneous Achilles Tendon Rupture: Case Report

Understanding Alkaptonuria: Pathophysiology and Mechanism

Alkaptonuria is a rare autosomal recessive disease characterized by a significant metabolic deficiency. This condition occurs due to the lack of the homogentisic acid (HGA) oxidase enzyme, which prevents the normal breakdown of HGA. Consequently, homogentisic acid products accumulate systemically within the body, specifically targeting the ligaments, cartilage, skin, and various internal organs.

Case Presentation: Spontaneous Achilles Tendon Rupture

In this article, we present the clinical case of a 61-year-old male patient who underwent surgical treatment following a diagnosis of spontaneous Achilles tendon rupture. The underlying metabolic disorder was not initially known but became evident during the operative procedure.

Intraoperative Diagnosis and Clinical Findings

The diagnosis of alkaptonuria was established based on the following observations and procedures:

• Intraoperative Tissue Color: The unique discoloration of tissues observed during surgery provided the first clinical clue.
• Subsequent Examinations: Post-operative specialized tests confirmed the enzyme deficiency and HGA accumulation.

Literature Review and Accompanying Pathologies

Beyond the specific case, this study provides a comprehensive review of alkaptonuria and its accompanying pathologies. By evaluating the findings in light of current medical literature, we aim to highlight the relationship between this metabolic disease and connective tissue vulnerabilities, such as tendon ruptures.