Square shoulder deformity

Because the joint cavity is empty, there is no humeral head, and the acromion protrudes, forming a typical square shoulder deformity. Shoulder tuberculosis appears with square shoulder deformity. Shoulder joint tuberculosis is relatively rare, accounting for only 1.06% of systemic osteoarticular tuberculosis. It is more common in adults than children (Turek, 1977), and it is most common between 21 and 30 years old. Most of them are in young adults, and most patients have active tuberculosis at the same time. Gender, male is slightly higher than female. The left is slightly more than the right.