The immune responses to monoinfection with the causative agent, Mycobacterium tuberculosis (Mtb), are distinct ... characterized by the presence of classical lung caseous/necrotic granuloma lesions, ...
Etiology: The cause of granuloma annulare is unknown. Granuloma annulare can occur at any age, but is seen predominantly in children and young adults. It occurs more frequently in females than males.
Histology based on acid-fast, periodic acid Schiff, or hexamine silver stains were unremarkable, while a polymerase chain reaction test for the presence of Mycobacterium tuberculosis was negative. The ...
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