Halberd-shaped pelvis
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Halberd
pelvis • Halberd - Ganzer Fall bei Radiopaedia
A halberd pelvis refers to a pathognomonic appearance of the pelvis seen in metatropic dysplasia, a rare form of spondyloepimetaphyseal dysplasia.
- hypoplastic ilia with narrow sacrosciatic notches
- horizontal acetabular roofs with small associated notches superior to their lateral borders
- prominent flaring of crescentic iliac wings
History and etymology
The appearance is thought to resemble a halberd, a two-handed pole weapon that was in popular use in central Europe from the 14th to 16th centuries. The halberd comprises an almost 2 meter long shaft, ending in a lengthened spiked head. Before the spike is the blade of an ax, with an opposed hook-like pick. It remains the ceremonial weapon of the Swiss Guard in the Vatican, the pope's bodyguard .
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