![]() ![]() A pathognomonic clinical exam finding of PSA is the “Cowie Sign,” in which a normal popliteal and pedal pulse can be palpated with an absent/diminished femoral pulse. They may also present with aneurysm formation, lower limb ischemia, or peripheral neuropathy with compression of the sciatic nerve. If symptomatic, patients generally present with non-specific gluteal pain or a buttock mass. They may present with an absent femoral pulse if the patient has a hypoplastic or absent femoral artery. 28Ĭlinically, most PSA patients are asymptomatic. ![]() 28 The complete type occurs when the main arterial supply to the lower limb is through the PSA, and the SFA is typically hypoplastic. The incomplete type occurs when the main arterial supply to the lower limb is through the SFA and the sciatic artery is hypoplastic and/or terminates in the thigh. suggested a classification that describes the persistent sciatic artery as complete or incomplete. It follows the path of the sciatic nerve, and communicates directly to the popliteal artery. 26 It begins as a branch of the internal iliac artery and passes through the greater sciatic foramen. 27 The PSA occurs with an estimated incidence of 0.03-0.06%. The reasons for insufficient femoral artery development are not well understood, but likely based on failure of complex molecular interactions. 26- 28 This occurs when there is hypoplasia or incomplete formation of the femoral artery. The persistent sciatic artery (PSA) occurs when the embryological sciatic artery fails to regress ( Figures 2 and 3). All subjects Allied Health Cardiology & Cardiovascular Medicine Dentistry Emergency Medicine & Critical Care Endocrinology & Metabolism Environmental Science General Medicine Geriatrics Infectious Diseases Medico-legal Neurology Nursing Nutrition Obstetrics & Gynecology Oncology Orthopaedics & Sports Medicine Otolaryngology Palliative Medicine & Chronic Care Pediatrics Pharmacology & Toxicology Psychiatry & Psychology Public Health Pulmonary & Respiratory Medicine Radiology Research Methods & Evaluation Rheumatology Surgery Tropical Medicine Veterinary Medicine Cell Biology Clinical Biochemistry Environmental Science Life Sciences Neuroscience Pharmacology & Toxicology Biomedical Engineering Engineering & Computing Environmental Engineering Materials Science Anthropology & Archaeology Communication & Media Studies Criminology & Criminal Justice Cultural Studies Economics & Development Education Environmental Studies Ethnic Studies Family Studies Gender Studies Geography Gerontology & Aging Group Studies History Information Science Interpersonal Violence Language & Linguistics Law Management & Organization Studies Marketing & Hospitality Music Peace Studies & Conflict Resolution Philosophy Politics & International Relations Psychoanalysis Psychology & Counseling Public Administration Regional Studies Religion Research Methods & Evaluation Science & Society Studies Social Work & Social Policy Sociology Special Education Urban Studies & Planning BROWSE JOURNALS ![]()
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