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Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection

Ana Luísa Nunes, Daniela Santos, Carolina Figueiredo, Ana Lai, Jandira Lima.

Abstract
Cutaneous tuberculosis is a rare manifestation of extra-pulmonary tuberculosis and is subclassified into two categories: tuberculids and true cutaneous forms of tuberculosis. Tuberculids develop due to a hypersensitivity reaction after exposure to Mycobacterium tuberculosis or its fragments. Lichen scrofulosorum, one type of tuberculid, is characterized by dispersed asymptomatic skin-coloured to reddish-brown papules. When present, true mycobacterial infection is frequently associated. A strongly positive tuberculin skin test and the absence of acid-fast bacilli in skin smears are common tuberculid diagnostic features. The current antituberculous regimens, used in other manifestations of tuberculosis, appear to be equally effective. The authors report the rare case of a young patient presenting with lichen scrofulosorum, which proved to be essential for the definitive diagnosis of tuberculosis lymphadenitis.

Key words: Lichen scrofulosorum, tuberculid, cutaneous tuberculosis, Mycobacterium tuberculosis


 
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How to Cite this Article
Pubmed Style

Nunes AL, Santos D, Figueiredo C, Lai A, Lima J. Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection. Int J Med Rev Case Rep. 2022; 6(3): 46-48. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723


Web Style

Nunes AL, Santos D, Figueiredo C, Lai A, Lima J. Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection. https://www.mdpub.net/?mno=139723 [Access: November 19, 2022]. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723


AMA (American Medical Association) Style

Nunes AL, Santos D, Figueiredo C, Lai A, Lima J. Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection. Int J Med Rev Case Rep. 2022; 6(3): 46-48. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723



Vancouver/ICMJE Style

Nunes AL, Santos D, Figueiredo C, Lai A, Lima J. Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection. Int J Med Rev Case Rep. (2022), [cited November 19, 2022]; 6(3): 46-48. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723



Harvard Style

Nunes, A. L., Santos, . D., Figueiredo, . C., Lai, . A. & Lima, . J. (2022) Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection. Int J Med Rev Case Rep, 6 (3), 46-48. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723



Turabian Style

Nunes, Ana Luísa, Daniela Santos, Carolina Figueiredo, Ana Lai, and Jandira Lima. 2022. Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection. International Journal of Medical Reviews and Case Reports, 6 (3), 46-48. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723



Chicago Style

Nunes, Ana Luísa, Daniela Santos, Carolina Figueiredo, Ana Lai, and Jandira Lima. "Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection." International Journal of Medical Reviews and Case Reports 6 (2022), 46-48. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723



MLA (The Modern Language Association) Style

Nunes, Ana Luísa, Daniela Santos, Carolina Figueiredo, Ana Lai, and Jandira Lima. "Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection." International Journal of Medical Reviews and Case Reports 6.3 (2022), 46-48. Print. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723



APA (American Psychological Association) Style

Nunes, A. L., Santos, . D., Figueiredo, . C., Lai, . A. & Lima, . J. (2022) Lichen scrofulosorum: a rare clue to Mycobacterium tuberculosis infection. International Journal of Medical Reviews and Case Reports, 6 (3), 46-48. doi:10.5455/IJMRCR.Lichenscrofulosorum-139723