The Diaphragm and Phrenic Arteries of a Male Viewed Inferiorly

Description

Seen from an inferior (abdominal) perspective in a male, the domes of the diaphragm are outlined by their muscular periphery converging on the central tendon, with the right hemidiaphragm positioned slightly more superior due to the underlying liver. The inferior surface relates anteriorly to the costal margin and posteriorly to the lumbar attachments, where the right and left crura descend toward the upper lumbar vertebrae with the median arcuate ligament spanning between them. Arterial supply is traced along the undersurface, highlighting the inferior phrenic arteries coursing superomedially from their origins near the abdominal aorta (often with celiac trunk variants) before distributing branches across each hemidiaphragm and toward the central tendon. This inferior view matters because the inferior phrenic arteries represent the dominant arterial supply to the diaphragm and are a frequent source of collateral flow in upper abdominal and thoracoabdominal disease. Interventional radiologists commonly target inferior phrenic branches during embolization for hepatocellular carcinoma or other hypervascular hepatic tumors, where feeders can arise from the right inferior phrenic artery and reach the hepatic dome through diaphragmatic attachments. Surgeons operating at the esophageal hiatus and along the crura also contend with these vessels, where unrecognized branches can drive troublesome bleeding in hiatal hernia repair or esophagectomy. Use it to teach diaphragmatic vascular anatomy in gross anatomy and thoracoabdominal surgery courses, to annotate atlases and journal figures discussing inferior phrenic artery variants, or to support IR protocols for mapping extrahepatic arterial supply before transarterial therapy. It also fits well in clinical education materials on referred shoulder pain pathways when paired with the phrenic nerve, even though the focus here stays on nutrient vessels. Anatomical accuracy verified by SciePro's Medical Advisory Board.