case_images: PMC5667449_01
case_images: Anterior and lateral view of neck mass
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case_images: PMC5667449_01_12901_2017_41_Fig1_HTML.jpg
case_images: Fig1
case_images: The swelling was extending superiorly at level of right angle of mandible, inferiorly 2 cm below the suprasternal notch, laterally 1 cm behind the posterior border of right sternocleidomastoid muscle and medially in the midline of neck (Fig. 1). 
case_images: CT of neck (coronal view)
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case_images: PMC5667449_01_12901_2017_41_Fig2_HTML.jpg
case_images: Fig2
case_images: Plain and contrast enhanced CT was suggestive of high flow vascular malformation (Figs. 2, 3, 4).
case_images: CT of neck (axial view)
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case_images: PMC5667449_01_12901_2017_41_Fig3_HTML.jpg
case_images: Fig3
case_images: Plain and contrast enhanced CT was suggestive of high flow vascular malformation (Figs. 2, 3, 4).
case_images: CT of neck (sagittal view)
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case_images: PMC5667449_01_12901_2017_41_Fig4_HTML.jpg
case_images: Fig4
case_images: Plain and contrast enhanced CT was suggestive of high flow vascular malformation (Figs. 2, 3, 4).
case_images: MRI of neck
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case_images: PMC5667449_01_12901_2017_41_Fig5_HTML.jpg
case_images: Fig5
case_images: MRI was suggestive of high flow vascular malformation or neoplastic mass having high vascularity in it (Fig. 5).    
case_images: CT angiography of neck
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case_images: PMC5667449_01_12901_2017_41_Fig6_HTML.jpg
case_images: Fig6
case_images: CT angiography (3D)
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case_images: Fig7
case_images: Exposure of mass with adherence to sternocleidomastoid and trapezius muscles
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case_images: PMC5667449_01_12901_2017_41_Fig8_HTML.jpg
case_images: Fig8
case_images: Intraoperatively, the mass was adhered to sternocleidomastoid muscle extending upto hyoid bone level superiorly and extended inferiorly upto the supraclavicular fossa, feeding vessels from right subclavian, external carotid, common carotid artery, thyrocervical trunk were ligated and also the draining vessels towards internal jugular vein were also ligated and the entire mass was removed in toto (Figs. 8, 9, 10).
case_images: Accessory nerve
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case_images: PMC5667449_01_12901_2017_41_Fig9_HTML.jpg
case_images: Fig9
case_images: Intraoperatively, the mass was adhered to sternocleidomastoid muscle extending upto hyoid bone level superiorly and extended inferiorly upto the supraclavicular fossa, feeding vessels from right subclavian, external carotid, common carotid artery, thyrocervical trunk were ligated and also the draining vessels towards internal jugular vein were also ligated and the entire mass was removed in toto (Figs. 8, 9, 10).
case_images: Excised mass 8 x 7 cm
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case_images: PMC5667449_01_12901_2017_41_Fig10_HTML.jpg
case_images: Fig10
case_images: Intraoperatively, the mass was adhered to sternocleidomastoid muscle extending upto hyoid bone level superiorly and extended inferiorly upto the supraclavicular fossa, feeding vessels from right subclavian, external carotid, common carotid artery, thyrocervical trunk were ligated and also the draining vessels towards internal jugular vein were also ligated and the entire mass was removed in toto (Figs. 8, 9, 10).
case_images: Skin closure with Prolene cutting body suture 4.0 and number 10 Romovac drain in situ
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case_images: PMC5667449_01_12901_2017_41_Fig11_HTML.jpg
case_images: Fig11
case_images: Haemostasis was secured and closed with Romovac drain number 10 (Fig. 11).    
case_images: 7 months follow up
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case_images: PMC5667449_01_12901_2017_41_Fig12_HTML.jpg
case_images: Fig12
case_images: Postoperatively she was free of complications and also at her subsequent follow ups (Fig. 12).
case_images: (a) low power view (x100) prominent thin walled blood vessels with proliferation of tumor cells around it along with variable proportion of smooth muscle and, (b) high power view (x400) individual tumor cells are small, uniform, round with central nucleus, discernible nucleoli and eosinophilic cytoplasm
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case_images: PMC5667449_01_12901_2017_41_Fig13_HTML.jpg
case_images: Fig13
case_images: However, no overt atypia/atypical mitosis evident (Fig. 13).