title: Sonographic findings in ectopic cervical thymus in an infant.
abstract: We present the case of a 28-day-old boy with ectopic thymic tissue in the neck. Sonography showed a well-delineated, homogeneous lesion in the left submandibular region that was isoechoic relative to the mediastinal thymus. The lesion had angular margins and lacked a mass effect despite its large size (3 x 2 cm). On power Doppler imaging, arteries with an intermediate-impedance flow pattern were seen entering the lesion from the inferior and lateral margins. On both T1- and T2-weighted MR images, the lesion was isointense relative to the mediastinal thymus and had higher and lower signal intensity than muscle and fat, respectively. A sonographically guided needle biopsy confirmed the diagnosis of ectopic thymus.
authors.affiliation: Department of Radiology, University of Ankara School of Medicine, Ibn-i Sina Hospital, 06100 Sihhiye, Ankara, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Fitoz
authors.forename: C
authors.initials: C
authors.lastname: Atasoy
authors.forename: E
authors.initials: E
authors.lastname: Türköz
authors.forename: D
authors.initials: D
authors.lastname: Gümüş
authors.forename: I
authors.initials: I
authors.lastname: Erden
authors.forename: S
authors.initials: S
authors.lastname: Akyar
mesh_terms: D002828:Choristoma / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009333:Neck / Q000000981:diagnostic imaging* / Q000473:pathology; D013950:Thymus Gland; D018608:Ultrasonography, Doppler