Excision of Schwannoma from ulnar nerve
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Peripheral nerve sheath tumours are rare but the true incidence is unknown as many are asymptomatic and present as spurious findings on imaging for other pathologies. When they are large or occur at natural compression points they are more likely to be symptomatic. Small subcutaneous nerve sheath tumours may present as small lumps that are painful if touched. Most tumours fall into the benign category and are either Schwannoma or Neurofibroma subtypes. Most are solitary but both can present as multiple tumours in neurofibromatosis. Multiple Schwannomas are also a feature of a separate genetic condition Schwannomatosis in which strings of multiple tumours may arise from a single nerve trunk.
Author: Mr Dominic Power FRCS (Tr & Orth)
Institution: The Queen Elizabeth Hospital ,Birmingham ,UK.
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Question 1 of 14
Which one of the following is not a feature of neurapraxia?CorrectIncorrect
Question 2 of 14
Which one of the following muscles is supplied by the ulnar nerve?CorrectIncorrect
Question 3 of 14
What one of the following is the normal intra-operative direct stimulation thresholds for the ulnar nerve?CorrectIncorrect
Question 4 of 14
Which one of the following statements about Schwannomas is false?CorrectIncorrect
Question 5 of 14
Which one of the following is a correct statement regarding a Schwannoma in the ulnar nerve at the mid-forearm level?CorrectIncorrect
Question 6 of 14
Which one is the incorrect statement regarding the dorsal branch of the ulnar nerve?CorrectIncorrect
Question 7 of 14
Which one of the following statements regarding the ulnar nerve is correct?CorrectIncorrect
Question 8 of 14
What is the root innervation of the ulnar nerve?CorrectIncorrect
Question 9 of 14
If MRI imaging of a nerve tumour raises the possibility of a primary malignancy, which one of the following is the correct course of action?CorrectIncorrect
Question 10 of 14
Following excision of an ulnar nerve tumour at mid forearm the patient has no ulnar intrinsic function at 6 week follow up. Which one of the following plans is most appropriate?CorrectIncorrect
Question 11 of 14
Following excision of an ulnar nerve tumour at mid forearm the patient has no ulnar intrinsic function at 6 month follow up. Which one of the following plans is most appropriate?CorrectIncorrect
Question 12 of 14
During the resection of a tumour from the ulnar nerve there is bleeding that obscures the microscope view of the deep surface of the tumour. Which one of the following statements is correct?CorrectIncorrect
Question 13 of 14
During the resection of a nerve tumour fascicles are seen to enter the tumour and will require sacrificing. Which one of the following is the most appropriate course of action?CorrectIncorrect
Question 14 of 14
In which of the following scenarios would you consider re-exploration of an ulnar nerve following tumour resection at the mid forearm level? Select one answer.CorrectIncorrect