Understanding medical terms

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G

Gastrin 

Gastrin is a hormone that increases production of acid by the stomach.

Gastrinoma

Type of NET that usually starts in the pancreas or the upper part of the small bowel (duodenum), which may produce too much gastrin.

Glucagon

Glucagon is a hormone that increases the glucose (sugar) level in the blood.

Glucagonoma

Type of NET which occurs most often in the pancreas and usually produces too much glucagon.

Goblet cell carcinoid (GCC)

GCC starts in the appendix and has features of both a NET and a faster growing type of cancer called an adenocarcinoma when looked at under the microscope.

Grading

How the tumour cells look under the microscope. The grade gives an idea of how quickly the tumour may grow.

Grade 1 (low grade)

Cells look very much like normal cells and are usually slow-growing.

Grade 2 (moderate grade)

These tumours are somewhere in between low-grade and high-grade tumours in their appearance and behaviour.

Grade 3 (high grade)

Cells look very abnormal and are likely to grow more quickly.

Gut hormones

Hormones produced within the gut which can be measured in the blood – vasoactive intestinal peptide, gastrin, glucagon, somatostatin, pancreatic polypeptide.

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