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Updated: Jul 3, 2026

Knee Arthrocentesis in Adults
Published on: February 25, 2022
Early syphilis: a cause of mono-arthritis of the knee
J Aderinto1, D Knight, J F Keating
1Department of Orthopaedic Trauma, Royal Infirmary of Edinburgh, Edinburgh, UK. joeaderinto@hotmail.com
Abstract:
The number of syphilis cases has increased in the UK in recent years, but many clinicians have limited experience in the diagnosis and treatment of this disease. If early diagnosis is not made and treated promptly with antibiotics, the disease may remain latent until the more serious manifestations of tertiary syphilis develop. We present the case of a 27-year-old man who presented with an acute mono-arthritis secondary to syphilis. The condition responded to antibiotic therapy. Orthopaedic surgeons should be aware of the diagnosis and consider it in patients with an acute arthropathy.
Insights
Syphilis cases are rising in the UK, and a young man developed joint pain due to the disease. Prompt antibiotic treatment resolved his symptoms, highlighting the need for clinical awareness.
Area of Science:
- Infectious Diseases
- Rheumatology
- Public Health
Background:
- Syphilis incidence is increasing in the UK.
- Limited clinician experience with syphilis diagnosis and treatment poses challenges.
- Untreated syphilis can lead to severe tertiary manifestations.
Observation:
- A 27-year-old male presented with acute mono-arthritis.
- The arthritis was diagnosed as secondary syphilis.
- The patient's condition improved significantly with antibiotic therapy.
Findings:
- Syphilis can manifest as acute arthropathy.
- Prompt antibiotic treatment is effective for syphilis-related joint inflammation.
- Early diagnosis and treatment are crucial to prevent tertiary syphilis.
Implications:
- Orthopaedic surgeons must consider syphilis in the differential diagnosis of acute arthropathy.
- Increased awareness and training on syphilis are needed for healthcare professionals.
- Public health strategies should address the rising syphilis rates.
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