Ectopic thyroid incidence reported is 4000-7000 and 90% of the time it being the only functioning thyroid tissue which occurs due to any arrest or irregularity in its decent from
foramen caecum to its normal position (Front of trachea).[2,4,5] Pathogenesis for occurrence of thyroid ectopia have been postulated and studied on physiological and biomolecular basis- maternal anti-thyroid antibodies arresting the decent of the gland and the role of transcription factors viz.
Ectopic thyroid usually occurs along the path of descent of the developing thyroid primodium from the
foramen caecum, commonest being lingual (Batsakis et al., 1996, Shehzad et al., 2001, Arancibia et al., 1998,) followed by sublingual are rather less frequent (Batsakis et al.) and in the anterior midline of neck at or below the level of the hyoid bone (Damiano et al., 1996).