Papulonecrotic tuberculid
Papulonecrotic Tuberculid
Papulonecrotic tuberculid (pronunciation: pap-u-lo-ne-crot-ic tub-er-cu-lid) is a rare form of cutaneous tuberculosis that is characterized by recurrent eruptions of symmetric skin lesions that heal with scarring.
Etymology
The term "papulonecrotic" is derived from the Latin words "papula" meaning "pimple", "necroticus" meaning "dead", and "tuberculid" is a term used to describe a group of skin conditions associated with an underlying or silent focus of tuberculosis.
Symptoms
The primary symptom of papulonecrotic tuberculid is the appearance of small, red, raised bumps (papules) on the skin that eventually become necrotic and heal with scarring. These lesions are typically symmetric and are most commonly found on the extremities, particularly the arms and legs.
Causes
Papulonecrotic tuberculid is caused by a hypersensitivity reaction to Mycobacterium tuberculosis, the bacterium that causes tuberculosis. It is not a direct skin infection, but rather a reflection of an underlying systemic tuberculosis infection.
Diagnosis
Diagnosis of papulonecrotic tuberculid is typically made based on the characteristic appearance of the skin lesions, a history of exposure to tuberculosis, and a positive tuberculin skin test. Additional tests, such as a chest X-ray or biopsy of a lesion, may be performed to confirm the diagnosis and identify the underlying tuberculosis infection.
Treatment
Treatment for papulonecrotic tuberculid involves addressing the underlying tuberculosis infection with antituberculous therapy. This typically includes a combination of medications such as isoniazid, rifampin, pyrazinamide, and ethambutol.
Related Terms
External links
- Medical encyclopedia article on Papulonecrotic tuberculid
- Wikipedia's article - Papulonecrotic tuberculid
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