腰部筋肉注射により発生した腎被膜下血腫の1例

Abstract

A 31-year-old female was referred to our clinic with lumbago. Diagnostic imagings demonstrated a renal subcapsular hematoma on the left side. The cause of the hematoma was unclear in spite of precise examinations and selective renal angiography ruled out a malignant change in the kidney. A close anamnesis brought out the fact that the patient had undergone a lumbar muscular injection 6 days before the initial visit. The onset of the hematoma presumed from the intensity of the hematoma on T2-weighed image of MRI, was in accordance with the date of the lumbar muscular injection. A CT scan taken after 3 months of conservative treatment revealed disappearance of the hematoma. We herein review the literature on causes and treatments of renal subcapsular hematoma. One must keep in mind that the causes of this condition include renal malignancy. MRI and/or CT scan are very useful in presuming the onset time of a hematoma.