title: Blue macule on the volar surface of the left thumb.
authors: Georgetown University, Washington Hospital Center, Washington, DC, USA.
authors: Loren
authors: L
authors: Zech
authors: Norris
authors: N
authors: Nolan
authors: Scott A
authors: SA
authors: Norton
mesh_terms: D000328:Adult; D005549:Foreign-Body Reaction / Q000175:diagnosis / Q000473:pathology*; D015743:Giant Cells, Foreign-Body / Q000473:pathology*; D006801:Humans; D006965:Hyperplasia; D008297:Male; D010141:Pacinian Corpuscles / Q000473:pathology*; D013933:Thumb