To protect the integrity of the sample and control the quality of this process Austin Neuromuscular Center established its own on-site CAP and CLIA certified pathology laboratory.

austin neuromuscle pathology lab

Our laboratory is one of few in the country that are currently performing PGP 9.5 with Collagen by immunofluorescent procedure. This gold standard procedure is widely regarded as the reliable and standardized tool that is most diagnostically efficient in distinguishing polyneuropathy patients (including small fiber neuropathy).

As a board-certified neuromuscular pathologist Dr. Yessar Hussain is certified to read and report on each sample processed in our lab.

pathology image collage

Austin Neuromuscular Center offers on-site muscle, nerve, and skin biopsy procedures along with pathology services in our CAP (College of American Pathologists) and CLIA (Clinical Laboratory Improvement Amendments) certified lab. We perform all biopsy procedures on-site under local anesthesia.

Muscle and nerve biopsies are indicated for a variety of muscle and nerve diseases, such as myositis, metabolic myopathy, hereditary myopathy, and vasculitis. The site of the tissue sample will depend on where you are feeling pain or weakness. Most often, samples are taken from the upper arm and thigh. For further details on the procedure itself, please review our muscle biopsy information packet.

Skin biopsies are a minimally invasive procedure that we use to diagnose small fiber neuropathy. Skin biopsies are helpful in evaluating small sensory nerve fibers that are harder to capture with an EMG/nerve conduction study. Generally, skin biopsies are done at the ankle and thigh. They are 3 millimeters in diameter and 2 millimeters deep. The procedure typically takes around 10 to 15 minutes. To learn more, you may read our skin biopsy information packet.

Outside muscle, nerve, and skin biopsies may be sent to the lab at Austin Neuromuscular Center for staining and interpretation. Please refer to our requisition form for full instructions.

Our lab offers the following services: tissue preparation, pathological interpretation, and staining (immunofluorescence, immunohistochemistry, histochemistry and nerve teasing) for outside muscle, nerve, and skin biopsies.

We also offer second neuropathological consultations for specimens/slides that have already been stained at a different facility. For this service, please fax a referral with all pertinent information to 512-920-0142.

Please review our FAQ below for more information. If you have further questions, please call the lab directly at 512-920-0140 ext. 205 or email us at

Please click on the below links to view our lab procedures for the biopsies.

Certifications and Licensing
CAP #: 8239200
CLIA #: 45D211459

Frequently Asked Questions / FAQs

Sections of muscle tissue are routinely prepared using numerous different histochemical and immunohistochemistry stains. The standard battery includes:


  • H&E
  • NADH
  • ATPase pH 9.4, 4.6 and 4.3
  • Congo Red
  • Sudan Black
  • Alkaline Phosphatase
  • Esterase
  • Periodic Acid Schiff (PAS)
  • Cytochrome Oxidase
  • Succinic Dehydrogenase
  • Phosphorylase
  • Modified Gomori Trichome


  • C5b-9 (MAC)
  • CD3
  • MHC Class I

Additional muscle tissue is archived for future analysis.

Nerve biopsies are processed for both frozen section and fixative nerve teasing. Frozen sections of nerve are routinely processed using different histochemical and immunohistochemistry stains. The routine battery includes:


  • H&E
  • Modified Gomori Trichrome
  • Congo Red
  • Alkaline Phosphatase
  • Esterase

Fixed skin biopsies (in Zamboni) are prepared using immunofluorescence and histochemical stains. The standard battery includes:


  • H&E
  • Congo Red
  • PGP 9.5 (immunofluorescence)

Our complimentary skin biopsy supply kit comes complete with: 3mm skin biopsy collection kit, Zamboni filled microcentrifuge tubes, biohazard bag, lab requisition with instructions, and a FedEx shipping bag and pre-printed label.

The results of pathological studies are interpreted by neuromuscular specialists including board-certified neuromuscular pathologist, Dr. Yessar Hussain.

A report will be faxed to the referring physician. Muscle and skin results should be expected within one to two weeks of receiving the sample. Nerve biopsy results can take two to three weeks.

We accept specimen 8:00 AM – 4:00 PM Monday through Thursday. The following is a list of holidays observed by our lab:

  • New Year’s Day
  • Memorial Day
  • Juneteenth
  • Independence Day
  • Labor Day
  • Thanksgiving Day
  • Day after Thanksgiving
  • Christmas Eve – only if the day falls on a working day (M – F)
  • Christmas Day

Learn more about our pathology services.