#fungus ball
- Aspergilloma — A pseudotumoral fungal mass, appearing as a ball or conglomerate, developed by the colonization of fungi from the Aspergillus genus (especially Aspergillus fumigatus) within a pre-existing pulmonary cavity (such as those left by tuberculosis, sarcoidosis, or air cysts). Also known as a fungus ball, it develops without invading the surrounding lung tissue, but can cause severe hemoptysis by eroding adjacent blood vessels.