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Old 03-10-2015, 02:20 PM #1
MAT52 MAT52 is offline
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Question Question about biopsy for small fiber neuropathy

I was going to get this done in a dermatology clinic far from home but my GP has just emailed to offer to do this himself next week. He says he's had a letter from the neuropathologist with instructions about how to do a punch biopsy - to be taken from my calf. Does this sound like the regular skin biopsy location for small fiber neuropathy?

I would much prefer to get it down in my home town of course and I'm sure my GP can do a simple punch biopsy but I had expected it to be done nearer my ankle than my calf - nearer to the nerve pain I was thinking? It would be helpful to have advice on this from anyone who has had skin biopsies taken for this purpose.
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Old 03-10-2015, 03:22 PM #2
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I was going to get this done in a dermatology clinic far from home but my GP has just emailed to offer to do this himself next week. He says he's had a letter from the neuropathologist with instructions about how to do a punch biopsy - to be taken from my calf. Does this sound like the regular skin biopsy location for small fiber neuropathy?

I would much prefer to get it down in my home town of course and I'm sure my GP can do a simple punch biopsy but I had expected it to be done nearer my ankle than my calf - nearer to the nerve pain I was thinking? It would be helpful to have advice on this from anyone who has had skin biopsies taken for this purpose.
Here are some links. You might make sure they know what they are doing and sent it to the correct lab.

https://therapath.com/patients/patient-faqs
https://www.therapath.com/tests/skin...ber-neuropathy
https://www.therapath.com/physicians...rocedure-video

I see that you are out of the country...not sure if the links can help much except educate you.


Hope that helps.
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Old 03-10-2015, 03:41 PM #3
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hi ,

I had my skin biopsy done at a hospital in London by a professor of neurology. it was done at the bottom of the calf near to the ankle.

Lou Lou
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Old 03-10-2015, 04:02 PM #4
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hi ,

I had my skin biopsy done at a hospital in London by a professor of neurology. it was done at the bottom of the calf near to the ankle.

Lou Lou
Thanks Lou Lou I will ask my GP to go as close to the ankle as he can. I am guessing you mean just above the achilles tendon?
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Old 03-10-2015, 04:12 PM #5
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I'm not sure that would give me a warm & fuzzy if he's never done it and is using instructions. It's not like it's a difficult procedure...very easy, in fact, but still the handling and such of the samples is very important, not to mention getting the correct depth of tissue.

Let me also add that I don't understand why he (or the other place) is only getting ONE sample. That doesn't make any sense at all. I had 3 three from each leg (ankle, knee and thigh). The reason is to assess length and non-length dependent SFN by seeing the density at different levels of the leg. This is very important. You may not need all three on both legs, but at least two should be done on the same leg (ankle and then knee or thigh as the other).

Maybe Glenn will chime in with more details on just how important this is.
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Old 03-10-2015, 04:29 PM #6
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I'm not sure that would give me a warm & fuzzy if he's never done it and is using instructions. It's not like it's a difficult procedure...very easy, in fact, but still the handling and such of the samples is very important, not to mention getting the correct depth of tissue.

Let me also add that I don't understand why he (or the other place) is only getting ONE sample. That doesn't make any sense at all. I had 3 three from each leg (ankle, knee and thigh). The reason is to assess length and non-length dependent SFN by seeing the density at different levels of the leg. This is very important. You may not need all three on both legs, but at least two should be done on the same leg (ankle and then knee or thigh as the other).

Maybe Glenn will chime in with more details on just how important this is.
En Bloc you express my concerns perfectly. Warm and fuzzy i am not which is precisely why I'm asking on here. This same GP recently misled me about the results of my lumbar puncture - which turned out to have been contaminated by a traumatic tap. My guess is that although he says he wants to save me the wait and travel time he actually wants to save the practice money on expensive airfares and consultant fees. And get some professional tick boxing done and have some time off the usual coughs and colds no doubt!

And so I am worried but I must also say that my problematic symptoms have intensified many times over since I had my neuro tests in mid January and I think the autonomic neuropathy has superseded the SFN now - I'm having respiratory problems, GI problems and issues with my nose, ears and jaw. So we are seriously thinking of leaving our home and heading for pastures with much better facilities for rheumatology and neurology within the year.

So even if he doesn't do it properly as I'd like - I will continue to push for doctors to find causes behind all this - hopefully somewhere that the specialists know what they are doing. He is taking his instructions from the lead neuropathologist in the country and so I guess I have to trust that this includes how many biopsies to take. I might make an apt to see him tomorrow about my respiratory issues and dizziness and print off the link Lou Lou sent me with diagram.

Meanwhile I'm not getting quite as much neuropathic pain as I was despite the withdrawal effects of coming off Cymbalta. So it's all very complicated but I'm grateful for all advice I can get.
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Old 03-10-2015, 06:18 PM #7
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I would at least inquire why he would only take one biopsy and if they will do another one if the results are positive. There is NO way to differentiate between length and non- length dependent SFN with just one biopsy location.

What autonomic symptoms are you having? Any chance you can get them to do an autonomic battery?
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Old 03-10-2015, 06:32 PM #8
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I definitely think three samples make the most sense. Mine showed no nerve fibers at the ankle, few above the knee, and segmented and breaking down at the upper thigh, which gave me a much better idea of what was going on and how it was progressing. I would insist on several collection sites. Your doctor can probably do it, but just one site would not yield enough information.
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Old 03-10-2015, 06:46 PM #9
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I would at least inquire why he would only take one biopsy and if they will do another one if the results are positive. There is NO way to differentiate between length and non- length dependent SFN with just one biopsy location.

What autonomic symptoms are you having? Any chance you can get them to do an autonomic battery?
I have just risked offending him by asking him about all this - quoting you on length dependency. I'm not getting this procedure done by him just to tick their NHS quality performance framework boxes and save them money -no way. I work as a volunteer supporting the NHS sbd public services but not donating tiny bits of my DNA to medical science if there's no gain for me and mine.

I tried to ask with charm and humour but if he blows a gasket with me in response then so be it. Almost enjoying the idea of a stand up row about how well he is remunerated to cut little bits off me and he's only going to do it if I'm reassured about your points. One calf only and one biopsy only isn't going to cut the mustard with me. My body - my SNF - my sanity all depend on feeling able to trust these people to have my interest at heart. Hopefully he will imagine bashing me over the head tk with a stick but will actually grin and say "of course I had planned to take several biopsies Mat" I am not just anither QOF (quality permanance indicator) for these doctors and will not be experimented on gratuitously just to save the NHS a few hundred pounds!

Re autonomic stuff - could easily be flu - sweating profusely or not sweatjng at all. Upper GI issues, respiration trouble with a dry cough, pain I chest wall/ ribs- dry eyes, dry nose, sores/ crusts and bleeds, earache, tinnitus, dizziness, jaw pain, no sense of taste or smell anymore, vaginal numbness, absence of sweating for months followed by nighttime drenching. Heart arhhythmia and . To be fair I think a lot may be stress related and I don't think its good to find a disease and get symptoms to fit so I'm trying to keep an open mind. But GPA/ Wegegers granulamatodis woukd tarry with many of my symptoms I admit!
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Old 03-10-2015, 07:07 PM #10
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I definitely think three samples make the most sense. Mine showed no nerve fibers at the ankle, few above the knee, and segmented and breaking down at the upper thigh, which gave me a much better idea of what was going on and how it was progressing. I would insist on several collection sites. Your doctor can probably do it, but just one site would not yield enough information.
Well ive put it to him now at least. I wonder whether anything will show up. I know that my feet are often icy cold where the can move from swelter to ice queen in seconds. If he's half the brain he things he is then he will agree to do at least two biopsies on one leg or two. We will see!
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