Final answer:
Osteoporosis is the skeletal anomaly that can mimic projective trauma, as it causes bones to weaken and fracture easily.
Step-by-step explanation:
The skeletal anomaly that can appear similar to projective trauma is osteoporosis. This condition is characterized by bones that lose mass, weaken, and become more susceptible to breakage and fracturing, even upon mild trauma. In severe cases of osteoporosis, abnormal bone formation may occur, creating thinner and/or shorter bones, potentially leading to a shorter stature. It's a common skeletal system disorder among millions of individuals, particularly affecting women.