Submuscular gluteal abcess: An unusual presentation of rare sacral tuberculosis.

•Gluteal abscess and sacral tuberculosis are rare entities in spine tuberculosis, as to our knowledge; this is the second case report about it.•MRI has a great role to describe anatomical pathophysiology of the abscess dissemination from sacral tuberculosis.•Sacral tuberculosis should be made as the main differential diagnosis for atypical sacral lesion that occurs with submuscular gluteal abscess.