QuestionSBA
QuestionChoice
This is a cancer found in the large bowel - this would not cause this specific visual disturbance on its own. It could cause a bitemporal hemianopia if it metastasises to the pituitary gland - however, this is extremely rare and it would not be the tumour you are **most** concerned about in this case.
10001818
b
Colorectal adenocarcinoma
QuestionChoice
The specific type of visual loss described in this question is bitemporal hemianopia.

This is a classic presenting symptom of a pituitary tumour - the tumour can get so large that it compresses the optic chiasm, causing peripheral vision loss in both eyes.
10001817
a
Pituitary adenoma
QuestionChoice
A vestibular schwannoma is a tumour found in the vestibulocochlear nerve. This is the 8th Cranial Nerve and is responsible for conducting hearing information to the brain and helping the body maintain balance.

A tumour in this nerve would result in symptoms such as hearing loss and/or a loss of balance. It would not result in a bitemporal hemianopia (loss of peripheral vision on both sides).
10001819
c
Vestibular schwannoma
QuestionChoice
An oligodendroglioma is a tumour in oligodendrocytes, the myelinating cells of the central nervous system. These tumours are usually found in the brain but can spread to the spinal cord as well.

This type of tumour can grow very large and is therefore likely to cause headaches, seizures, nausea/vomiting, and a loss of sensation in the limbs.

It can also cause speech, vision or memory problems. However, the visual loss associated with this type of brain tumour is likely to be gradual, with blurriness and double vision, or an increasing blind spot.

It is much less likely to cause a bitemporal hemianopia - the loss of peripheral vision on both sides - this is much **more likely** to be due to a pituitary adenoma compressing the optic chiasm.
10001820
d
Oligodendroglioma
QuestionChoice
An ocular melanoma is a tumour found in the eye - this is likely to cause visual loss in one eye only.

Visual loss of both sides is more indicative of an issue in the brain - in this case, a  pituitary tumour is the **most likely** cause of the tumour.
10001821
e
Ocular melanoma
Concept
Chapter
2693
3977
Pituitary disease
Topic
133
Endocrinology
12910
A 79-year-old man presents to the Emergency Department with peripheral vision loss in both eyes.

You suspect he may have a tumour - which of the following tumours are you most concerned about?
a