Isolated tuberculosis of Achilles tendon

Area of Science:

• Orthopedics
• Infectious Diseases
• Radiology

Background:

• Tuberculosis (TB) remains a significant global health challenge, particularly in developing nations.
• Resurgent TB and co-infection with HIV contribute to atypical presentations, including infections at unusual anatomical sites.
• Isolated tubercular tenosynovitis, specifically affecting the Achilles tendon without bone involvement, is exceptionally rare.

Observation:

• A 55-year-old immunocompetent male presented with symptoms suggestive of Achilles tendon pathology.
• Diagnostic imaging and subsequent biopsy confirmed tuberculosis as the causative agent.
• No evidence of a primary TB focus, either distant or contiguous to the tendon, was identified.

Findings:

• The case details an isolated tuberculosis infection of the Achilles tendon.
• This presentation is highly unusual, lacking any discernible primary or secondary tuberculous lesion elsewhere in the body.
• The patient's immunocompetent status further complicates the typical understanding of TB dissemination.

Implications:

• This case underscores the importance of considering tuberculosis in the differential diagnosis of tenosynovitis, even in immunocompetent individuals presenting with isolated lesions.
• It highlights the diagnostic challenges posed by rare presentations of TB and the need for thorough investigation to rule out occult primary sources.
• Further research into the pathogenesis and management of such isolated musculoskeletal TB presentations is warranted.