A man was 'flabbergasted' after being referred to hospital only to be told he had to wait 10 months for a test.
Geoff Humphries, 59, was referred by his local GP to Aintree University Hospital for further tests after the symptoms of either stomach or bowel inflammation emerged.
But when the referral letter arrived he was told the current waiting time to see a specialist was around 10 months, the Liverpool Echo reports.
"When I was told that the wait was 44 weeks I was flabbergasted", he told the paper.
"It's a really worrying thing that it could take me the best part of a year to be seen for something that could be so serious.
"I spoke to my GP to complain about it.
"I was told that quite a few clinics have a long waiting list.
"My doctors have done their best. They're looking to other hospital trusts to see if they can do it quicker.
"If I had been classified as an urgent case, I was told that I could be seen in two weeks."
"I think it's ridiculous to have to wait that long. I've been feeling really unwell. Without these tests, I won't know what is causing my problem."
He added: "Regardless of the problem, you shouldn't have to wait 44 weeks."
According to NHS guidelines, the maximum length of time a patient should have to wait for diagnostic tests is six weeks.
While the target for patients needing 'non-urgent' treatment is that they should wait no longer than 18 weeks.
The latest available waiting time data from NHS England reveals 3.5 per cent of patients in England had to wait over six months for diagnosis.
Nationally, 14.2 per cent of patients had to wait longer than 18 weeks for treatment.
A spokesman for Aintree University Hospital Trust , said: "Appointments are allocated according to clinical need and availability.
"We are experiencing high levels of demand in some services and are working to reduce waiting times. We are happy to meet with Mr Humphries to discuss his concerns in more detail."