visualdx.com

a89K9 TIL: Terra firma-forme dermatosis (TFFD), sometimes referred to as Duncan's dirty dermatosis, is a condition characterized by asymptomatic, hyperpigmented, dirtlike plaques that are resistant to regular washing with soap and water but easily rub off with 70% isopropyl alcohol
4kO45 TIL of chorea gravidarum, a rare neurologic condition in which pregnant women develop involuntary writhing/jerking movements similar to those in Huntington's disease. It usually resolves completely after delivery.