International Journal of Anatomy and Research



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Type of Article : Case Report

Year: 2014 | Volume 2 | Issue 4 | Page No. 740-743

Date of Publication: 31-12-2014

DOI: 10.16965/ijar.2014.537


ATYPIC DRAINAGE PATTERN OF POSTERIOR INTERCOSTAL VEINS INTO THE AZYGOS VENOUS SYSTEM

Rimpi Gupta *1, Deepak Goyal 2, APS Batra 3, Shveta Swami 4.

*1 Assistant professor, Dept of Anatomy, BPS GMC For Women, Khanpur Kalan, Sonipat, India.
2 Medical officer HCMS-1, PHC Dubheta,Dist Sonepat, Haryana, India.
3 Professor & Head, Dept of Anatomy, BPS GMC For Women, Khanpur Kalan, Sonipat, India.
4
Associate professor, Dept of Anatomy, BPS GMC For Women, Khanpur Kalan, Sonipat, India.

Address: Dr. Rimpi Gupta, MBBS, MS Anatomy, Assistant professor, Dept. of Anatomy, BPS GMC For Women, Khanpur Kalan, Sonipat, India.
E-Mail:
dr.rimpigupta15@gmail.com

Abstract

The azygos venous system vary greatly in their mode of  origin, course,tributaries, anastomoses and  termination which resulst predominantly due to its complex embryological development. Azygos venous system develops as right and left azygos venous lines. Right azygos venous line develops into vertical part of azygos vein whereas the left one develops into accessory hemiazygos and inferior hemiazygos veins. These are connected by subcentral/ transvertebral  veins. In the present case, we found an atypic drainage pattern of posterior intercostal veins into azygos venous system, left being more variable. Right superior intercostal vein formed by 2nd and 3rd posterior intercostal veins whereas left superior intercostal vein was found to be absent. 2nd, 3rd, 4th & 5th  left posterior intercostal veins thus drained into accessory hemiazygos vein. Sixth and seventh left PICVs formed a common trunk with accessory hemiazygous vein and drained into the azygous vein at T6 level. Eighth one united with the hemiazygos vein and formed a common trunk which drained into azygos vein at T8 level. Such variations of the azygos venous system are important for a clinician during mediastinal surgeries to prevent inadvertent hemorrhagic complications.
KEYWORDS: Azygos vein, accessory hemiazygos vein, hemiazygos vein, superior intercostal vein.

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Rimpi Gupta, Deepak Goyal, APS Batra, Shveta Swami. ATYPIC DRAINAGE PATTERN OF POSTERIOR INTERCOSTAL VEINS INTO THE AZYGOS VENOUS SYSTEM. Int J Anat Res 2014;2(4):740-743. DOI: 10.16965/ijar.2014.537

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