What is the gas shadow in the bilateral sacroiliac joint space?

2

Most of them are unilateral and bilateral.

three

Ankylosing spondylitis sacroiliitis: it is the early stage of the disease, and the lesions are mostly bilateral. According to different etiology, there are different clinical manifestations:

1

It is common in young women, such as ankylosing spondylitis, traumatic sacroiliitis, acute suppurative sacroiliitis and brucellosis sacroiliitis.

Clinical manifestations:

The main symptoms of sacroiliitis are pain and tenderness in sacroiliac joint area, pain in waist and buttocks, swelling or fluctuation in front of sacroiliac joint, and partial bursting to form sinus and dense sacroiliac arthritis. Clinically, sacroiliac arthritis can be divided into sacroiliac tuberculous arthritis and sacroiliac tuberculous arthritis: patients have low fever in the afternoon, dense sacroiliac arthritis: the bone density of joints increases, spondylitis sacroiliac arthritis and percussion pain, and some patients have bone fusion.

four

The spine is bamboo-like.

It is more common in young men, with early articular surface bone destruction and late articular space widening and blurring.