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JOURNAL TITLE: International Journal of Head and Neck Surgery
The classical Shamblin's classification predicts only vascular morbidity without remarking on the neurological morbidity, while the neurological damage increase with vessel ligation and reconstruction. A modified Shamblin's classification described by Luna-ortiz with incorporation of the Hallett's zones of injury has been studied here.
We present a case series analysis of carotid body paraganglioma managed in our institute. The study included 17 patients, 14 females and three males with a mean duration of presentation of 6.82 months. All were imaged with multislicer computed tomography angiography (CTA) and magnetic resonance angiography (MRA) for preoperative assessment and operated in the craniocaudal technique. The tumors were graded according to the modified Shamblin's criteria: grades I (2), II (13), IIIa (2), IIIb (0).
All the preoperative assessment of grading matched with the intraoperative findings. External carotid artery (ECA) ligation was done in two cases, no internal carotid artery (ICA) ligation and reconstruction were done. Two cases of permanent damage to the 12th nerve, two vagal nerve weakness was seen. No stroke or mortality recorded. The tumor was confirmed on immunohistochemistry. The patients were followed up for 6 months to 5 years with a mean follow-up of 2.5 years.
Preoperative imaging assessment using multislicer computed tomography angiography (MSCTA) and MRA helps to measuring the circumferential vessel involvement in grade III tumors. So, a craniocaudal dissection with assessment of all the zones of injury reduced blood loss and minimized neurovascular complications.
Halkud R, Shenoy AM, Nanjundappa A, Chavan P, Sidappa KT, Madhu SD, Biswas S, Naik SM. Paradigm Shift of Carotid Body Paraganglioma Surgical Technique from Caudocranial to Craniocaudal Dissection: Analysis of Recent Literature. Int J Head Neck Surg 2014;5(3):119-125.
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