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the prominent anterior edge of the tibia and lower leg.
the sharp-edged, anteriorly convex tibia in congenital syphilis.
a sharp, anterior bowing of the tibia caused by hereditary syphilis.
DiffDx Non-progressive, bilateral and symmetrical anterior bowing of the tibia and fibula may be seen in achondroplasia, type IX Ehlers-Danlos syndrome, enchondromatosis, fibrous dysplasia, excess fluoride ingestion in pregnancy, hyperparathyroidism, hyperphosphatasia, neurofibromatosis, osteogenesis imperfecta, osteomalacia, osteomyelitis, rickets, thanatophoric dwarfism, Weismann-Netter syndrome
saber shinA descriptor for the thickened, anteriorly-bowed–with possible lateral bowing tibial cortex, caused by chronic periostitis which spares the epiphysis, first described in latent congenital syphilis, which may also be seen in advanced acquired syphilis.
sa·ber tib·i·a, saber shin (sā'bĕr tib'ē-ă, shin)
Deformity of the tibia occurring in tertiary syphilis or yaws, the bone having a marked forward convexity as a result of the formation of gummas and periostitis.