1) Submandibular gland needle biopsy for diagnosis of Parkinson disease and 2) Topic of the month: Mitochondrial disorders. This podcast for the Neurology Journal begins and closes with Dr. Robert Gross, Editor-in-Chief, briefly discussing highlighted articles from the print issue of Neurology. In the second segment Dr. Michelle Brown interviews Dr. Charles Adler about his paper on submandibular gland needle biopsy for diagnosis of Parkinson disease. Dr. Roy Strowd is reading our e-Pearl of the week about nodes needing neurofascin. In the next part of the podcast Dr. Maria Farrugia interviews Dr. Andrew Schaefer about syndromes of mitochondrial disorders. The participants had nothing to disclose except Drs. Adler and Strowd.Dr. Adler serves on the scientific advisory board of Bachmann Strauss Dystonia and Parkinson Foundation; is a consultant for Allergan, Inc., Novartis, Merz Pharmaceuticals, LLC, XenoPort, Inc.; receives royalties from the publication of the book Parkinson's Disease and Movement Disorders; receives research support from Avid Radiopharmaceuticals, Department of Defense, Michael J. Fox Foundation for Parkinson's Disease Research, National Parkinson's Foundation and NIH.Dr. Strowd serves on the editorial team for the Neurology® Resident and Fellow Section.