I'm male, age 51. About 5 months ago, after (voluntarily) losing 30 pounds on a low-carb, hi protein diet, I started awakening with numb / tingling fingers. Since then, it's progressed to regular (but intermittent) sensory loss in parts of all four distal limbs, with slight muscular weakening, plus some muscular and joint soreness (especially shoulders / upper arms). My health is fine otherwise.
After arm EMG/NCVs, a neurologist diagnosed mononeuritis multiplex (both wrists & elbows). Lab tests all normal -- Chest X-Ray, CBC, Differential, HbA1C, Blood Glucose, Blood B12, Glycohemoglobin, Sed rate, BUN, ANA, C3 & C4 complement, rheumatoid factor, Hep B antigen, protein electrophoresis, Lyme disease, ANCA, C-Reactive, immunoglobulin GAM, creatinine. Also been examined by a rheumatologist.
My neurologist says it is "most likely" HPNN, with some chance of still-undetected vasculitis. He wants to wait to see what happens for another month, then possibly do a nerve biopsy. He recommends against the genetic test for HPNN, saying it is not that reliable. He also declined to do MRIs (cranial or spinal) or a lumbar puncture because he says the problems aren't in the CNS.
I'm not happy just waiting to see what happens, as my symptoms are definitely progressing.
(1) What addition tests (including HPNN genetic, MRI, LP, or others) would you recommend now?
(2) Is the HPNN test reliable?
(3) Is HPNN likely to present as almost-simultaneously appearing symptoms in multiple limbs?
(4) Suggestions for other possible diagnoses?
Don't want to disagree with the neurologist as they have had the advantage of examining you and reviewing your test results. But doesn't sound too typical of HNPP. As you pointed out, it's symmetric in all limbs which is not really characteristic of that particular disease. I agree that it's probably not in the central nervous system (brain and spine), but protein level in a spinal tap can often be helpful when evaluating a progressive peripheral neuropathy like this one. The EMG is EXTREMELY important in your case and should be done by a formally trained physician or at a major academic or clinical center with a neuromuscular specialist. If the results point to demyelination of the nerves, this shortens the list of things it could be to diseases such as chronic inflammatory demyelinating polyneuropathy and all of its variants. Also There are diseases that are linked genetically to HNPP like Charcot Marie Tooth which may be what your doc was talking about?? That's a hereditary neuropathy that can be checked for in the blood and on EMG. This and HNPP are linked to Chr 17. The test may not be 100%, but in patients that I suspect these diseases, it's worth checking.
As you are "not happy just waiting" I recommend a second opinion by a neuromuscular specialist. If you are nearby, Drs. SHields and Levin are excellent specialists here at the clinic who will be happy to see you. GOod luck,.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. MedHelp is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.