Pityriasis versicolor is a skin disease caused by fungi belonging to the genus Malassezia. These fungi exist in two forms, a yeast and a filamentous form, which resemble meatballs and spaghetti respectively when viewed under the microscope in a solution containing potassium hydroxide.
Prajapati V, Mydlarski PR: Dermacase. Tinea versicolor. Can Fam Physician, 2008 54(11):1557-8. Go to reference