DI notes

-> medial iliac lymphadenopathy
-> regional peritonitis
-> diskospondylitis

inflammation = mottled appearance, not homogenous; gas opacity

(1) ribs, vertebrae, and the visible portions of the pelvis and pelvic limbs; (2) soft tissues of the abdominal wall; (3) serosal detail and character of retroperitoneal space; (4) serosal detail and character of peritoneal space; (5) parenchymal organs (liver,
spleen, kidneys); (6) urinary bladder; (7) organs not typically
seen; (8) stomach; (9) duodenum and jejunum; and finally
(10) the cecum and colon.

peritoneum { parietal, visceral, and connecting layers
connecting { mesenteries, omenta, intraabdominal ligaments
retroperitoneal space { adrenals, kidneys, ureters, major vessels, LN

abdominal LN { parietal, visceral

parietal LN (retroperitoneal) { spine, adrenals, kidneys, DCd abd, pelvis, pelvic limbs
– medial iliac lymph nodes: the largest of the sublumbar group, btwn deep circumflex iliac and external iliac aa; ventral to L5-6, sometimes L6-7
“The most common cause of medial iliac lymphadenopathy is neoplasia.”

visceral LN { liver, spleen, pancreas, stomach, intestine
– Cr mesenteric LN (largest) { jejunum, ileum, pancreas
“Visceral abdominal lymph nodes rarely enlarge enough to
be seen radiographically, tending to silhouette with surrounding


tubular structure btwn colon and bladder => uterus
– may contain fetal skeletons (not normally detected otherwise)
– the earliest detectable mineralization is 42 days (6w, gestation is 9w)
– in cats, 35 days (5w of 9w)



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