Abstract
Knowledge of the morphological variations within the abdominal cavity is significant for all medical practitioners planning surgery. This report presents the rare origin of a common trunk for the right inferior phrenic artery, and superior and inferior suprarenal artery from the right renal artery. An accessory hepatic artery was found, which served as a branch of the right inferior phrenic artery. The diameter of the common trunk was 3.95 mm, and the diameters of the inferior and superior suprarenal arteries were 1.84 and 1.36 mm, respectively. The diameter of the right inferior phrenic artery was 2.55 mm. Both the embryological background and the potential clinical significance of this morphological variation are discussed. Knowledge of this common trunk and the occurrence of the accessory right hepatic artery may be of significance in diagnostic and surgical procedures.
Highlights
A great deal of variation is seen in the origins of the inferior phrenic arteries (IPA), i.e. the right inferior phrenic artery (RIPA) and the left inferior phrenic artery (LIPA); they generally originate from the abdominal aorta or celiac trunk [1, 4, 10, 14,15,16, 21, 29, 32, 33], and are known to supply the diaphragm, oesophagus, stomach, liver, adrenal glands and retroperitoneum
The superior suprarenal artery (SSA) arises from the LIPA, the middle suprarenal artery (MSA) arises from the aorta between the IPA and the renal artery (RA), while the inferior suprarenal artery (ISA) derives from the RA; they may show variations in their origins [2, 7,8,9, 20, 21]
While Dutta et al [8] report variability in the origin of the ISA, i.e. 18% originated from the gonadal arteries and 6% from the right lateral margin of the abdominal aorta, our present study found the ISA to originate from the common trunk
Summary
The morphological variability existing between unpaired branches of the abdominal aorta has attracted the attention of anatomists, surgeons and radiologists due to its significance in a range of clinical procedures, including surgery of aneurysms or radiological transarterial chemoembolization procedures for tumours [19, 25, 26, 30]. The SSA arises from the LIPA, the MSA arises from the aorta between the IPA and the renal artery (RA), while the ISA derives from the RA; they may show variations in their origins [2, 7,8,9, 20, 21] This case report describes a rare variant origin of a common trunk for the right inferior phrenic artery (which gives the right accessory hepatic artery) and the superior and inferior suprarenal artery from the right renal artery. A careful resection was performed of the interrupting tissues, where a common trunk of the right inferior phrenic artery, and superior and inferior suprarenal artery originated from the right renal artery, which originated from the anterior side of the abdominal aorta. The diameter of the common trunk was 3.95 mm, the first branch was the inferior suprarenal artery (diameter 1.84 mm); following this, the course was divided into the superior suprarenal artery (diameter 1.36 mm) and the common trunk of the right inferior phrenic artery and the right
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