RAO, Srujana; SANGHVI, Yashasvi. When PCR Fails, The ’Open-Ring’ Sign as a Diagnostic Anchor in Probable HIV-Associated PML: A Case Report. International Journal of Medical Students, [S. l.], 2026. Disponível em: https://ijms.info/IJMS/article/view/4818. Acesso em: 22 aug. 2026.