QuestionSBA
QuestionChoice
The T1 spinal nerve innervates a dermatome higher up than the umbilicus (above the nipple-line), so would not be responsible for this patient's symptoms.
10000519
d
Damage to the T1 spinal nerve
QuestionChoice
Cauda Equina syndrome results due to compression of the cauda equina - a series of nerve roots which travel through the spinal canal after L2/3. The cauda equina supplies sensation, parasympathetic, and motor innervation to the lower limbs, bladder, and rectum. Therefore, compression leads to symptoms such as incontinence, saddle anaesthesia, and bilateral sciatica. Loss of sensation would not occur above the lower limbs.
10000520
e
Cauda Equina syndrome
QuestionChoice
Pancoast tumours are a type of lung cancer affecting the pulmonary apex. They can lead to neurological symptoms by causing pressure on the sympathetic ganglion. However, these symptoms are ptosis, anhidrosis, and miosis.
10000517
b
Pancoast tumour
QuestionChoice
The diaphragm is innervated by spinal nerves C3-5, which also innervate the dermatomes of the shoulder and parts of the arm. Therefore, diaphragm irritation can present as referred cutaneous shoulder pain.
10000518
c
Diaphragm irritation
QuestionChoice
The T10 spinal nerve innervates the dermatome which covers the umbilical region. Therefore damage to the T10 spinal nerve may explain this patient's loss of sensation.
10000516
a
Damage to the T10 spinal nerve
Concept
Chapter
2693
3780
Dermatomes
Topic
141
Neurology
12650
A 24-year-old male presents with loss of sensation over the umbilical region.

Which of the following is most likely to have caused this?
a