title: The os supra petrosum of Meckel and nodular petroclinoid ligament calcification.
mesh_terms: D002113:Calcification, Physiologic; D006801:Humans; D008022:Ligaments / Q000000981:diagnostic imaging / Q000502:physiology*; D010579:Petrous Bone / Q000000981:diagnostic imaging / Q000502:physiology*; D011859:Radiography; D013100:Sphenoid Bone / Q000000981:diagnostic imaging / Q000502:physiology*