Recurrent thyroid abscess — Is it a fourth branchial archanomaly?

Listn, S.L.: 4th Branchial fistula. Otolaryngol Head Neck Surg. 89: 520–521,1981

Michael S. Godin: 4th Branchial pouch sinus: Principles of Diagnosis and Management, Laryngoscope 100: Feb 1990.

Takai S. Akira M. Internal Fistula as a route of infection in acute suppurativethyroiditis, Lancet, 1: 751–752, 1979

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Tovi F. Gatot A. et al, Recurrent suppurative thyroiditis due to 4th Branchial pouch sinus, Int. J. Pediatric OtoRhinoLaryngol, 9(1): 89–96, 1985

Wilson L.B., Embryological development of head and neck region — Branchial region, Head and Neck Surg, 2: 59–66, 1979 Enclosed:

Axial cut of contrast study of case report 1 showing abcess cavity in relation to left para oesophageal gutter closely related to sternocleidomastoid muscle and left lobe of thyroid gland.

Axial cut of contrast study of case report 2 showing abcess cavity in right anterior triangle, infra hyoid portion, anterior to carotid sheath and involving right sternocleidomastoid laterally, sternothyroid and thyroid gland medially.