title: A rare accessory muscle in the hand--the flexor digitorum superficialis indicis.
abstract: Accessory muscles are easily overlooked during imaging evaluation. Although usually discovered incidentally, they are occasionally symptomatic. With increasing utilization of cross-sectional imaging, the radiologist should be prepared to readily identify these anomalous muscles. It is particularly important to distinguish these anatomical variants from soft-tissue tumors prior to invasive intervention, reserving biopsy and surgery for children who are symptomatic. This report discusses a case of a flexor digitorum superficialis indicis muscle, an extremely rare but well-described accessory muscle, presenting as a painful mass in a 15-year-old girl. The report includes the clinical presentation, radiologic findings, and the significance to management.
authors.affiliation: Department of Radiology and Radiologic Sciences, Monroe Carell Jr. Children's Hospital at Vanderbilt, 2200 Children's Way, Ste. 1415, Nashville, TN, 37232-9700, USA. wendy.ellis@vanderbilt.edu.|Department of Pediatrics, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, TN, USA. wendy.ellis@vanderbilt.edu.
authors.forename: Wendy D
authors.initials: WD
authors.lastname: Ellis
authors.affiliation: Department of Radiology and Radiologic Sciences, Monroe Carell Jr. Children's Hospital at Vanderbilt, 2200 Children's Way, Ste. 1415, Nashville, TN, 37232-9700, USA.
authors.forename: Stephanie E
authors.initials: SE
authors.lastname: Spottswood
authors.affiliation: Department of Orthopaedics and Rehabilitation, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, TN, USA.
authors.forename: Steven A
authors.initials: SA
authors.lastname: Lovejoy
mesh_terms: D000328:Adult; D005260:Female; D006228:Hand Deformities, Congenital / Q000150:complications* / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D018482:Muscle, Skeletal / Q000002:abnormalities* / Q000473:pathology*; D010146:Pain / Q000175:diagnosis / Q000209:etiology*
keywords: Accessory muscle; Adolescent; Flexor digitorum superficialis indicis; Hand; Magnetic resonance imaging