A Case of Carcinoma Metastasis of Unknown Primary Mimicking Spondylodiscitis in an HIV+ Patient.

In this case report, a case of carcinoma metastasis of unknown primary mimicking spondylodiscitis in a patient with acquired immunodeficiency syndrome (AIDS) is presented. A 50-year-old AIDS patient presented with a history of mechanical falls from his own level one month ago and leg weakness for the last three days. Spinal magnetic resonance imaging (MRI) revealed a compression fracture of the T4 vertebral body, spinal cord compression, and pathology compatible with spondylodiscitis. Posterior decompression and fusion were performed, and the patient benefited. The preoperative ASIA score was C, and the postoperative ASIA score was D. The sample taken from the lesion for pathology showed carcinoma metastasis. Tumor markers and whole-body computed tomography (CT) and MRI results did not support primary malignancy. Positron emission tomography was planned for further evaluation but could not be performed due to the poor general condition of the patient. During follow-up, the patient died of sepsis due to an intensive care unit infection. As new cases of carcinoma metastasis mimicking spondylodiscitis in AIDS patients are added to the literature, we will have more information about the diagnosis and treatment process.