Diagnostic imaging features of hepatic myelolipoma incarcerated in a peritoneopericardial diaphragmatic hernia in a cat

Abstract

A 1-year-old male Persian cat was presented for castration. Liver incarcerated in a peritoneopericardial diaphragmatic hernia (PPDH) was diagnosed through pre-anesthetic tests. Multiple homogeneous hyperechoic nodules in the hepatic parenchyma were identified using ultrasound. The nodules showed decreased attenuation compared with normal hepatic parenchyma, and the herniated hepatic parenchyma showed increased arterial and decreased portal enhancement on computed tomography. From the histopathology, we diagnosed hydropic degeneration with portal fibrosis and myelolipoma. This report presents diagnostic imaging features of hepatic myelolipoma incarcerated in a PPDH in a cat. When perfusion of the hepatic parenchyma is altered, surgical treatment should be considered.

Giant splenic myelolipoma in a cat with hyperthyroidism

“…These benign masses can lead to complications associated with size or haemorrhage. 6 , 7 , 12 , 15 , 17 , 18 There are two previous reports of haemoabdomen occurring in cats with myelolipomas. 6 , 7 One of these was a mass within the liver, 7 whereas the other case had two large myelolipomas identified within the spleen (4.5 cm and 9.5 cm, respectively).…”

“…There are few reports of myelolipoma occurring within the domestic cat, and the majority of these report masses within the liver. 7,[12][13][14][15][16][17][18]25 However, there are some refer ences within diagnostic imaging texts which suggest that they are subclinical, small, static lesions, identified as incidental findings on ultrasonography. 2 The patho genesis of myelolipomas is unknown.…”

“…However, there are occasional reports of hepatic myelolipomas. 7,[12][13][14][15][16][17][18] Several of these have been associated with peritoneopericardial diaphragmatic hernias. 12,15,18 Splenic myelolipomas have been reported in dogs [19][20][21][22] and in the cheetah.…”

“…7,[12][13][14][15][16][17][18] Several of these have been associated with peritoneopericardial diaphragmatic hernias. 12,15,18 Splenic myelolipomas have been reported in dogs [19][20][21][22] and in the cheetah. 23,24 There are two cases of splenic mye lolipoma reported within the domestic cat literature, 6,25 and a further three cases noted in large case series report ing ultrasonographic findings or surgical outcomes.…”