PMC8318975_01
Meropenem was used from the third day onwards. The red arrow represents the start time of the final treatment plan. The patient was discharged on the 13th day and was hospitalized again on the 20th day. (A) platelet count; (B) white blood cell count; (C) daily maximum temperature; (D) liver function tests, aspartate transaminase, and alkaline phosphatase; (E) total bilirubin level; and (F) creatinine levels.
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The changes in significant laboratory test results during the whole treatment process are shown in  Figure 1 .
The lung window and location image of the patient's lung on CT. (A, C) The lung CT image on the 6th day after admission; (B, D) The lung CT image on the 13th day after admission.
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A repeat CT of the lungs revealed that the inflammation was better than before ( Figure 2 ).
MRI results of lumbar plain scan. (A) The result of TIWI; (B) The result of T2FS; (C) The result of T2WI. The right lumbar vertebrae 4 and 5 showed high signal, and the signal intensity of L4-5 and L5-S1 increased. Abnormal signal was seen around lumbar 4-5 vertebral body, T1WI was equal signal, T2WI was slightly high signal, and lipid pressure image was high signal. The right psoas major, iliopsoas major, and left psoas major were swollen. Irregular abnormal signal shadow was seen in the course area, with uneven internal signal. The lesions on the right side were large, and the maximum axial plane was about 8.1 x 6.0cm.
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The patient mainly had lower back pain, and the magnetic resonance imaging (MRI) of the lumbar spine indicated that the possibility of abscess formation in L4 and L5 was high, and the possibility of inflammation and abscess formation in the right greater psoas muscle, iliopsoas muscle, and left greater psoas muscle was high ( Figure 3 ).