BACKGROUND Posterior mediastinum is a very rare site of ectopic thyroid and such cases are usually identified incidentally by radiography. CASE PRESENTATION A 74 year-old Caucasian male was operated for a mass located in the right posterior mediastinum. Diagnosis of thyroid tissue was confirmed intra-operatively by frozen section and the mass was resected totally. He is well without any probl...

Ectopic adrenocorticotropic hormone (ACTH) syndrome is caused most frequently by a bronchial carcinoid tumor or by small cell lung cancer. Medullary thyroid carcinoma (MTC) is a rare etiology of ectopic ACTH syndrome. We describe a case of Cushing syndrome due to ectopic ACTH production from MTC in a 48-year-old male. He was diagnosed with MTC 14 years ago and underwent total thyroidectomy, cer...

RATIONALE Ectopic thyrotropin (TSH)-secreting pituitary adenomas are exceedingly rare. To date, there are only 6 cases reported. Here, we describe an even rarer ectopic TSH-secreting pituitary adenoma (TSH-oma) concomitant with papillary thyroid carcinoma. PATIENT CONCERNS A 27-year-old female was admitted to the hospital in 2002 for neck enlargement and palpitation. Thyroid function test sho...

Intrathyroidal thymic tissue is rare and may be confused with a malignant thyroid nodule because of hyperechoic dots mimicking calcifications. We report the case of a thyroid nodule with malignant ultrasonographic findings in a 4-year-old child, which was confirmed cytologically as ectopic thymic tissue. The sonographic findings of ectopic thymus were similar to those of the thymus; therefore, ...

The diagnosis on the basis of low serum thyroxine level wiJh high thyrotropin level of congenital pri1111lfY hypothyroidism in newborn screening programs fails to distinguish between transient hypothyroidism and ectopic thyroid, athyrosis, dyshormonogenesis, or transient hyperthyrotropinemill. The correct use of neonotol thyroid scintigraphy aids in making a specific anatomic diagnosis. We scan...

INTRODUCTION: Thyroid ectopia can be found at the site of thyroid origin in the floor of the mouth, or anywhere along its path of embryological descent, thus reflecting the normal migration of thyroid progenitor cells. The most frequent sites of ectopic thyroid tissue are lingual, sublingual, thyroglossal and laryngotracheal, with ectopic intratracheal thyroid (EITT) accounting for a small mino...

BACKGROUND Ectopic substernal thyroid is a rare symptom of thyroid disease that entirely results from the developmental defects at early stages of thyroid embryogenesis and during its descent. Cases were seldom reported as primary ectopic substernal thyroid cancer, especially those with severe local invasion and tracheal relapse. CASE PRESENTATION In this report, the patient presented odynoph...

Ectopic thyroid tissue is a rare entity resulting from developmental defects at early stages of thyroid gland embryogenesis, during its passage from the floor of the primitive foregut to its final pre-tracheal position. It is frequently found around the course of the thyroglossal duct or laterally in the neck, as well as in distant places such as the mediastinum and the subdiaphragmatic organs....

INTRODUCTION True benign thyroid masses very rarely present as a solitary lateral neck mass. Different aetiological mechanisms have been proposed for such masses. CASE REPORT We report a case of thyroid follicular adenoma that presented as a lateral neck mass. DISCUSSION Ectopic thyroid tissue and metastases from primary thyroid carcinoma should always be considered in the differential diag...