Background: Tuberculosis is still rampant in endemic mode in our country. Several locations are possible. The osteoarticular form is rare but very serious. The prognosis depends on the speed of the diagnosis and the effectiveness of the treatment. Method: We report a case of spondylodiscitis and abscess of the psoas muscles of tuberculous origin diagnosed at the bacteriology laboratory Ibn Sina Hospital in Rabat by bacteriological tests and confirmed by imaging. Results: The evolution was favorable after anti-tuberculosis treatment according to the National Protocol for Tuberculosis Control. But the presence of very large lytic lesions made the practice of effort spots almost impossible given the risk of vertebral fracture which remains imminent. The osteoarticular location of tuberculosis is rare but very serious given its destructive power on the bone. The prognosis remains even worse when it comes to a vertebral location which can bring into play a functional or even vital prognosis in certain cases. Conclusion: In our context where tuberculosis is still endemic, it is unforgivable to miss the diagnosis which must be raised whenever the context is suspect. Do not hesitate to deplore all biological and radiological means in order to have an accurate diagnosis and be able to treat effectively, to avoid any complications.