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Papulonecrotic tuberculid.
Vijayasankar Palaniappan1, Anusuya Sadhasivamohan1, Kaliaperumal Karthikeyan1
1Department of Dermatology, Venereology and Leprosy, Sri Manakula Vinayagar Medical College and Hospital, Pondicherry, India.
Clinical and Experimental Dermatology
|June 20, 2022
Summary
Papulonecrotic tuberculid (PNT) is a rare skin rash linked to tuberculosis in highly immune individuals. Prompt treatment with antituberculous therapy is a key characteristic of this condition.
Area of Science:
- Dermatology
- Infectious Diseases
- Immunology
Background:
- Papulonecrotic tuberculid (PNT) is an uncommon dermatological condition.
- It is associated with tuberculosis (TB) infections in patients with high immunity and allergic sensitivity to mycobacteria.
- PNT presents as recurrent papulonecrotic lesions that crust, ulcerate, and scar.
Purpose of the Study:
- To enhance awareness of Papulonecrotic tuberculid among dermatologists.
- To highlight the association between PNT and tuberculosis.
- To inform about diagnostic and therapeutic considerations for PNT.
Main Methods:
- Review of clinical presentations and diagnostic findings of PNT.
- Histopathological examination of skin lesions.
- Assessment of patient immune and allergic status related to mycobacterial organisms.
- Evaluation of treatment responses to antituberculous therapy.
Main Results:
- PNT lesions are characterized by crusting, ulceration, and atrophic scarring.
- Tuberculin tests are typically strongly positive in affected individuals.
- Histology reveals tuberculoid changes with endarteritis and dermal vascular thrombosis.
- A significant hallmark is the rapid response to antituberculous therapy.
Conclusions:
- Papulonecrotic tuberculid is a distinct tuberculid eruption requiring recognition.
- Diagnosis is supported by clinical presentation, positive tuberculin tests, and characteristic histology.
- Effective management relies on antituberculous therapy, underscoring the link to underlying TB infection.
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