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Guidelines for Complications of Cancer Treatment Vol VIII Part B

Guidelines for Complications of Cancer Treatment Vol VIII Part B

Guidelines for Complications of Cancer Treatment Vol VIII Part B

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Risk factorsCentral compartment (Level VI) clearance (bilateral has higherrates)Lateral neck dissectionTotal thyroidectomy has higher rates as compared to subtotalor hemithyroidectomyThyroid cancer associated with thyrotoxicosisLesser rates seen in centres which per<strong>for</strong>m larger volumes <strong>of</strong>thyroid surgeryDiagnosisClinicalHypocalcaemia presents with signs <strong>of</strong> generalizedneuromuscular irritability including paraesthesia, musclecramps, laryngospasm, tetany and seizures. Thisneuromuscular irritability can also be displayed throughelicitation <strong>of</strong> Chvostek’s and Trousseau’s Sign.Chvostek’s sign: Tapping <strong>of</strong> face just anterior to ear andbelow zygomatic arch, produces twitching <strong>of</strong> ipsilateralfacial muscles suggestive <strong>of</strong> neuromuscular excitabilitycaused by hypocalcaemia.Trousseau’s sign: Inflating a sphygmomanometer about20mmHg above the systolic blood pressure produces amuscle contraction including flexion <strong>of</strong> wrist andmetacarpophalangeal joints, hyperextension <strong>of</strong> fingersand flexion <strong>of</strong> thumb on the palm, suggestive <strong>of</strong>neuromuscular excitability caused by hypocalcaemia.Serum calciumTotal calcium < 9mg/dl (2.1mmol/L)Ionised calcium- < 4.5mg/dl ( 1.1mmol/L)199

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