Hi Miss Molly, Last week I had another cat scan. The abscess has shrunk Some. Here is the measurement: noted in the midline perineum, posterior to the anus, measuring 3 x 1.6 x 3.7 cm in AP, transverse and craniocaudal diameter, previously 4.1 x 3 x 4.7 cm. No other mass or ascites. The visualized u...