What's Missing?

Scapulectomy. The white arrows point to the location of the left scapula, which has been surgically removed as treatment for a sarcoma. There are several vascular clips in the region. Indications for total scapulectomy include chondrosarcoma, Ewing sarcoma, metastases, and osteosarcoma.

Patellectomy. The yellow arrow points to the expected location of the shadow of the patella in the frontal projection. The patella had been surgically removed. Removal of the patella may be done in patients with severely comminuted fractures of the patella.

Proximal carpectomy.The bones of the proximal carpal row (where the red arrows are pointing) have been surgically removed in this patient with a history of scapholunate advanced collapse (SLAC). Proximal capectomies may also be performed for non-union of a scaphoid fracture to relieve pain.