Fig. 2
From: A case of primary psoas abscess presenting as buttock abscess
The apparent buttock abscess was eliminated by direct approach over the lesion below the iliac wing, and the psoas and retroperitoneal abscess was eradicated by anterolateral retroperitoneal approach above the iliac wing. The closed suction drain was inserted into the retroperitoneum through the communicating channel between the buttock and the psoas lesions