Hicks BL, Lam JC, Varacallo M. Piriformis Syndrome. StatPearls. 2020 Jan. [QxMD MEDLINE Link]. [Full Text].
Probst D, Stout A, Hunt D. Piriformis Syndrome: A Narrative Review of the Anatomy, Diagnosis, and Treatment. PM R. 2019 Aug. 11 Suppl 1:S54-S63. [QxMD MEDLINE Link].
Yoshimoto M, Kawaguchi S, Takebayashi T, et al. Diagnostic features of sciatica without lumbar nerve root compression. J Spinal Disord Tech. 2009 Jul. 22(5):328-33. [QxMD MEDLINE Link].
Niu CC, Lai PL, Fu TS, et al. Ruling out piriformis syndrome before diagnosing lumbar radiculopathy. Chang Gung Med J. 2009 Mar-Apr. 32(2):182-7. [QxMD MEDLINE Link]. [Full Text].
Beatty RA. The piriformis muscle syndrome: a simple diagnostic maneuver. Neurosurgery. 1994. 34:512-514. [QxMD MEDLINE Link].
Mizuguchi T. Division of the pyriformis muscle for the treatment of sciatica. Postlaminectomy syndrome and osteoarthritis of the spine. Arch Surg. 1976 Jun. 111(6):719-22. [QxMD MEDLINE Link].
Chang C, Jeno SH, Varacallo M. Anatomy, Bony Pelvis and Lower Limb, Piriformis Muscle. StatPearls. 2020 Jan. [QxMD MEDLINE Link]. [Full Text].
Iwanaga J, Eid S, Simonds E, Schumacher M, Loukas M, Tubbs RS. The majority of piriformis muscles are innervated by the superior gluteal nerve. Clin Anat. 2019 Mar. 32 (2):282-6. [QxMD MEDLINE Link].
Windisch G, Braun EM, Anderhuber F. Piriformis muscle: clinical anatomy and consideration of the piriformis syndrome. Surg Radiol Anat. 2007 Feb. 29(1):37-45. [QxMD MEDLINE Link].
Guvencer M, Iyem C, Akyer P, et al. Variations in the high division of the sciatic nerve and relationship between the sciatic nerve and the piriformis. Turk Neurosurg. 2009 Apr. 19(2):139-44. [QxMD MEDLINE Link].
Smoll NR. Variations of the piriformis and sciatic nerve with clinical consequence: a review. Clin Anat. 2010 Jan. 23(1):8-17. [QxMD MEDLINE Link].
Russell JM, Kransdorf MJ, Bancroft LW, et al. Magnetic resonance imaging of the sacral plexus and piriformis muscles. Skeletal Radiol. 2008 Aug. 37(8):709-13. [QxMD MEDLINE Link].
Popovac H, Bojanic I, Smoljanovic T. Leg length discrepancy as a rare cause of a piriformis syndrome. J Back Musculoskelet Rehabil. 2012 Jan 1. 25(4):299-300. [QxMD MEDLINE Link].
Papadopoulos SM, McGillicuddy JE, Albers JW. Unusual cause of 'piriformis muscle syndrome'. Arch Neurol. 1990 Oct. 47(10):1144-6. [QxMD MEDLINE Link].
Vassalou EE, Katonis P, Karantanas AH. Piriformis muscle syndrome: a cross-sectional imaging study in 116 patients and evaluation of therapeutic outcome. Eur Radiol. 2018 Feb. 28 (2):447-58. [QxMD MEDLINE Link].
Freburger JK, Holmes GM, Agans RP, et al. The rising prevalence of chronic low back pain. Arch Intern Med. 2009 Feb 9. 169 (3):251-8. [QxMD MEDLINE Link]. [Full Text].
Jankiewicz JJ, Hennrikus WL, Houkom JA. The appearance of the piriformis muscle syndrome in computed tomography and magnetic resonance imaging. A case report and review of the literature. Clin Orthop. 1991 Jan. (262):205-9. [QxMD MEDLINE Link].
Lewis AM, Layzer R, Engstrom JW, et al. Magnetic resonance neurography in extraspinal sciatica. Arch Neurol. 2006 Oct. 63(10):1469-72. [QxMD MEDLINE Link]. [Full Text].
Filler AG, Haynes J, Jordan SE, et al. Sciatica of nondisc origin and piriformis syndrome: diagnosis by magnetic resonance neurography and interventional magnetic resonance imaging with outcome study of resulting treatment. J Neurosurg Spine. 2005 Feb. 2(2):99-115. [QxMD MEDLINE Link].
Fishman LM, Zybert PA. Electrophysiologic evidence of piriformis syndrome. Arch Phys Med Rehabil. 1992 Apr. 73(4):359-64. [QxMD MEDLINE Link].
Jawish RM, Assoum HA, Khamis CF. Anatomical, clinical and electrical observations in piriformis syndrome. J Orthop Surg Res. 2010 Jan 21. 5(1):3. [QxMD MEDLINE Link]. [Full Text].
Ahadi T, Yousefi A, Sajadi S, Yousefi N, Babaei-Ghazani A. Comparing radial extracorporeal shockwave therapy and corticosteroid injection in the treatment of piriformis syndrome: A randomized clinical trial. J Bodyw Mov Ther. 2023 Jan. 33:182-8. [QxMD MEDLINE Link].
Gonzalez P, Pepper M, Sullivan W, et al. Confirmation of needle placement within the piriformis muscle of a cadaveric specimen using anatomic landmarks and fluoroscopic guidance. Pain Physician. 2008 May-Jun. 11(3):327-31. [QxMD MEDLINE Link]. [Full Text].
Reus M, de Dios Berna J, Vazquez V, et al. Piriformis syndrome: a simple technique for US-guided infiltration of the perisciatic nerve. Preliminary results. Eur Radiol. 2008 Mar. 18(3):616-20. [QxMD MEDLINE Link].
Al-Al-Shaikh M, Michel F, Parratte B, et al. An MRI evaluation of changes in piriformis muscle morphology induced by botulinum toxin injections in the treatment of piriformis syndrome. Diagn Interv Imaging. 2015 Jan. 96(1):37-43. [QxMD MEDLINE Link].
Fishman LM, Wilkins AN, Rosner B. Electrophysiologically identified piriformis syndrome is successfully treated with incobotulinum toxin A and physical therapy. Muscle Nerve. 2016 Dec 9. [QxMD MEDLINE Link].
Fishman LM, Konnoth C, Rozner B. Botulinum neurotoxin type B and physical therapy in the treatment of piriformis syndrome: a dose-finding study. Am J Phys Med Rehabil. 2004 Jan. 83(1):42-50; quiz 51-3. [QxMD MEDLINE Link].
Lang AM. Botulinum toxin type B in piriformis syndrome. Am J Phys Med Rehabil. 2004 Mar. 83(3):198-202. [QxMD MEDLINE Link].
Yoon SJ, Ho J, Kang HY, et al. Low-dose botulinum toxin type A for the treatment of refractory piriformis syndrome. Pharmacotherapy. 2007 May. 27(5):657-65. [QxMD MEDLINE Link].
Jeynes LC, Gauci CA. Evidence for the use of botulinum toxin in the chronic pain setting--a review of the literature. Pain Pract. 2008 Jul-Aug. 8(4):269-76. [QxMD MEDLINE Link].
Kirschner JS, Foye PM, Cole JL. Piriformis syndrome, diagnosis and treatment. Muscle Nerve. 2009 Jul. 40(1):10-8. [QxMD MEDLINE Link].
Chang A, Ly N, Varacallo M. Piriformis Injection. StatPearls. 2020 Jan. [QxMD MEDLINE Link]. [Full Text].
Fowler IM, Tucker AA, Weimerskirch BP, Moran TJ, Mendez RJ. A randomized comparison of the efficacy of 2 techniques for piriformis muscle injection: ultrasound-guided versus nerve stimulator with fluoroscopic guidance. Reg Anesth Pain Med. 2014 Mar-Apr. 39(2):126-32. [QxMD MEDLINE Link].
Misirlioglu TO, Akgun K, Palamar D, Erden MG, Erbilir T. Piriformis syndrome: comparison of the effectiveness of local anesthetic and corticosteroid injections: a double-blinded, randomized controlled study. Pain Physician. 2015 Mar-Apr. 18 (2):163-71. [QxMD MEDLINE Link]. [Full Text].
Wu O. Piriformis syndrome treated by triple acupuncture with the bai hu yao maneuver. J Tradit Chin Med. Sep 2003. 23(3):197-8.