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.

An age-by-sex interaction in the incidence of cutaneous pyogenic granulomas (PGs) varying by anatomical location has been identified ... The investigators conducted a retrospective case series using a ...

Xing-bing Li from the department of Pathology, Guangyuan Central Hospital for his precious aid in the interpretation of patient pathology reports. The authors declare that the research was conducted ...