title: Morphological variations within a given area of articular surface of cartilage.
mesh_terms: D000293:Adolescent; D000842:Ankle; D002358:Cartilage, Articular / Q000166:cytology*; D006801:Humans; D007223:Infant; D007717:Knee; D008684:Metatarsus; D008855:Microscopy, Electron, Scanning