Could Lupus Be Misdiagnosed in Patients with Syphilis Symptoms? - Dermatology

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Is there a misdiagnosis of lupus erythematosus?


Recently, I went to the hospital for urine and blood tests.
The doctor indicated that the urine protein levels were elevated.
After the first blood test, the doctor suspected systemic lupus erythematosus (SLE) and recommended further testing.
Upon receiving the results from the second test, the doctor confirmed the diagnosis of SLE.
However, the test report also showed positive results for syphilis.

Recently, I have been experiencing hair loss, swollen lymph nodes, a sore throat, persistent coughing, and rashes resembling mosquito bites with small blisters.
Additionally, I have sores on my lips.
I personally believe these symptoms are caused by syphilis, but the doctor has diagnosed me with SLE based on the second blood test.

I would like to ask if there is a possibility of misdiagnosing syphilis, as I am currently receiving treatment for SLE and taking medication for it.

Ao, 20~29 year old female. Ask Date: 2023/12/24

Dr. Li Yufen reply Dermatology


Hello: Please refer to the current guidelines for the diagnosis and treatment of systemic lupus erythematosus at http://www.tsim.org.tw/article/A91/%E5%B8%B8%E8%A6%8B_12.pdf.
If there are any doubts regarding the diagnosis of lupus erythematosus, it is recommended to seek a second opinion from a rheumatologist.
Thank you!

Reply Date: 2023/12/24

More Info


Lupus, particularly systemic lupus erythematosus (SLE), is a complex autoimmune disease that can present with a wide range of symptoms, making its diagnosis challenging. In your case, the presence of symptoms that could be attributed to both lupus and syphilis raises important considerations regarding the potential for misdiagnosis.

Firstly, it is essential to understand that both lupus and syphilis can share overlapping symptoms, such as skin rashes, joint pain, and systemic manifestations like fever and malaise. In some instances, the skin lesions associated with lupus can resemble those seen in syphilis, particularly in secondary syphilis, which can present with a rash that may be mistaken for other conditions. Additionally, systemic symptoms such as lymphadenopathy (swollen lymph nodes) and fatigue can occur in both diseases.

In your situation, the initial diagnosis of lupus was based on elevated urine protein levels and subsequent blood tests. However, the presence of a positive syphilis test complicates the clinical picture. It is crucial to note that a positive syphilis test does not rule out the possibility of lupus. In fact, patients with autoimmune diseases can have concurrent infections, including syphilis. The key is to differentiate between the two conditions based on clinical findings and laboratory results.

The symptoms you describe, such as hair loss, sore throat, persistent cough, and oral ulcers, can indeed be associated with lupus. However, they can also be indicative of an active syphilis infection or other underlying conditions. The presence of a positive syphilis test should prompt further investigation and treatment for syphilis, as untreated syphilis can lead to severe complications.

It is also important to consider the timing of your symptoms and the initiation of treatment. If you are currently receiving treatment for syphilis, it is essential to monitor your symptoms closely. The treatment for syphilis typically involves antibiotics, which should help alleviate symptoms related to that infection. However, if lupus is also present, it may require a different treatment approach, often involving immunosuppressive medications.

Given the complexity of your case, it is advisable to maintain open communication with your healthcare provider. Discuss your concerns about the potential for misdiagnosis and the need for a comprehensive evaluation of both conditions. Your doctor may recommend additional tests, such as repeat serological tests for syphilis, lupus-specific antibodies, and possibly imaging studies to assess any underlying issues.

In conclusion, while it is possible for lupus to be misdiagnosed in the presence of syphilis symptoms, a thorough clinical evaluation and appropriate testing are crucial for an accurate diagnosis. It is essential to address both conditions concurrently, as they may require different treatment strategies. Regular follow-up with your healthcare provider will help ensure that both your lupus and any potential syphilis infection are managed effectively.

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