Ki-67 - Ronny Allan - Living with Neuroendocrine Cancer

Tag: Ki-67

The expression of antigen Ki67 is strongly associated with tumour cell proliferation and growth, and is widely used in routine pathological investigation as a proliferation marker. The nuclear protein Ki67 (pKi67) is an established prognostic and predictive indicator for the assessment of biopsies from patients with cancer. It’s therefore an excellent marker to determine the growth fraction of a given cell population. The fraction of Ki-67-positive tumour cells (the Ki-67 labelling index) is often correlated with the clinical course of cancer. Pathologists normally need to count about a thousand cells in order to determine the percentage of cells that are Ki67 positive – thus why you see Ki67 expressed as a percentage. 0% is the lowest, 100% is the highest. Often, they add greater or less than signs depending on the sample involved, i.e. >5% or <5%. There are other measurement systems in place, mainly Mitotic Count which tends to be more frequently used for Lung NENs. The Ki-67 index can usually be determined, even in cases of small biopsies but Mitotic rate counting requires a moderate amount of tumour tissue (at least 50 HPFs or 10 mm) and may not be feasible for small biopsies.

09May 2019 by Ronny Allan 5 Comments

The Heterogeneity of Grade 3 (High grade) Neuroendocrine Neoplasms

Awareness, Patient Advocacy

Reviewed and updated 14th March 2022High Grade - the forgotten patient group?When reading articles in the mainstream media, found in medical publications; and even listening to doctors speak about my disease, it's clear that the focus is on the term "Neuroendocrine Tumours" or NET for short. Many websites of advocate foundation organisations and specialist scientific organisations, all still use the term "NET" in their naming. I too am guilty of having a large Facebook site falling into this category. It's little wonder that those with high grade disease can often feel like the forgotten patient group. Clearly all the aforementioned organisations support all patients regardless of grade, but it's true to say that the naming and general use of terminology continues to fall behind. It's also true that the term…

19May 2017 by Ronny Allan 5 Comments

ASCO 2017 – Let’s talk about NETs #ASCO17

Clinical Trials

ASCO (American Society of Clinical Oncology) is one of the biggest cancer conferences in the world normally bringing together more than 30,000 oncology professionals from around the world to discuss state-of-the-art treatment modalities, new therapies, and ongoing controversies in the field. As Neuroendorine Tumors is on a roll in terms of new treatments and continued research, we appear to be well represented with over 20 'extracts' submitted for review and display. This is fairly complex stuff but much of it will be familiar to many. I've filtered and extracted all the Neuroendocrine stuff into one list providing you with an easy to peruse table of contents, complete with relevant linkages if you need to read more. For many the extract title and conclusion will be sufficiently educational or at least…

27Feb 2017 by Ronny Allan 4 Comments

It’s been 10 years since I saw a scalpel (….but my surgeon is still on speed dial)

Living with Neuroendocrine Cancer, Survivorship, Treatment

In 2012, I had a bunch of lymph nodes removed. Two separate areas were resected, only one was showing growth but both were showing up as hotspots on an Octreoscan. I had known since shortly after diagnosis in 2010 that 'hotspots' were showing in my left 'axillary' lymph nodes (armpit) and my left 'supraclavicular fossa' (SCF) lymph nodes (clavicle area). Some 10 months previously, I had a major liver resection, and 5 months prior to the liver resection, I had a small intestinal primary removed including work on some associated complications. There had always been a plan to optimise cytoreduction of my distant metastases, it was just a matter of timing. I still can't get my head around why metastases from a small intestinal NET managed to get to this area but…

17Jan 2017 by Ronny Allan 18 Comments

Neuroendocrine Cancer: Nodes, Nodules, Lesions (and false alarms!)

Living with Neuroendocrine Cancer, Survivorship, Treatment

A fairly common disposition of Neuroendocrine Neoplasms is a primary with associated local/regional secondary's (e.g. lymph nodes), and often with liver metastases. Technically speaking, the liver is distant. However, many metastatic patients appear to have additional and odd appearances in even more distant places, including (but not limited to) the extremities and the head & neck. Certain things are known about the behaviour of Neuroendocrine Neoplasms (NENs) (a term for Neuroendocrine Tumours and Neuroendocrine Carcinoma) and specialists will be analysing many factors when working out the type of NEN and how it might behave. This is useful in cases of unknown primaries as it can give them clues to the possible location(s). Read more about these issues in my article "Needle in a Haystack".How does cancer spread? In addition to…

27Oct 2015 by Ronny Allan 25 Comments

Grading and Staging – Neuroendocrine Neoplasms (incorporating WHO 2021 changes)

Patient Advocacy

One of the most discussed and sometimes confusing subjects on forums is the staging and grading of Neuroendocrine Neoplasms (NENs). Mixing them up is a common error and so it's important to understand the difference despite the apparent complexity. If I was to make a list of questions for my specialist/Oncologist at diagnosis, it would include "What is the stage, grade and differentiation of my cancer". To enable me to synchronise with the documented guidance, I'm going to use the following WHO 2019 approved terms in this post and then provide an update of the key WHO 2019 changes below.Neuroendocrine Neoplasm (NEN) - all types of Neuroendocrine tumour of whatever grade (please note Neoplasm is another word for tumour)Neuroendocrine Tumour (NET) - all well-differentiated tumours, Grade 1,2 or 3 (an…