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Radiologic-pathologic correlation of unusual lingual masses: Part I: congenital lesions.

Because the tongue is superficially located and the initial manifestation of most diseases occurring there is mucosal change, lingual these lesions can be easily accessed and diagnosed without imaging analysis. Most congenital lesions of the tongue, however, can manifest as a submucosal bulge and be located in a deep portion of that organ such as its base; their true characteristics and extent may be recognized only on cross-sectional images such as those obtained by CT or MRI. In addition, because it is usually difficult to differentiate congenital lesions from other submucosal neoplasms on the basis of imaging findings alone, clinical history and physical examination should always be taken into consideration when interpreting CT and MR images of the tongue. Although the radiologic findings for congenital lesions are nonspecific, CT and MR imaging can play an important role in the diagnostic work-up of these unusual lesions. Delineation of the extent of the tumor, and recognition and understanding of the spectrum of imaging and the pathologic features of these lesions, often help narrow the differential diagnosis.

Bronchogenic Cyst↗

Thyroglossal duct remnants. Preoperative evaluation and management.

Midline cervical cysts arising from the thyroglossal duct are one of the most common causes of anterior neck swelling in children. The potential for confusion between the thyroglossal duct cyst and the ectopic thyroid gland is well documented and may result in serious complications. A retrospective chart analysis was therefore undertaken to determine the relative importance of clinical evaluation, thyroid function testing, and radioisotope scanning in distinguishing these two entities preoperatively. A combined study was carried out by The Children's Hospital, Boston, Mass, and Rainbow Babies Hospital, Cleveland, Ohio. The hospital records, including nuclear scans, were reviewed. A total of 229 patients were taken to the operating room between January 1, 1978, and December 31, 1987. Nuclear scanning was performed in 30% of these patients. This subgroup of patients forms the basis for our guidelines of preoperative assessment. The absolute need for a preoperative scan is reexamined.

Adolescent↗

Carcinoma of the thyroglossal duct.

A review of 39 instances of excision of a cyst of the thyroglossal duct performed at St. Paul Medical Center, Dallas, Texas, revealed two patients with carcinoma of the thyroglossal duct. A review of the English literature yielded 146 instances of this uncommon tumor. Eighty-four per cent were papillary adenocarcinoma of thyroid type and 5 per cent were squamous cell carcinoma. The patients were from six to 81 years old with a 2:1 female to male ratio. Metastatic disease to lymph nodes was noted in 11 per cent and invasion of overlying strap muscles was found in 4 per cent. Carcinoma of the thyroid gland occurred in 14 per cent. Preoperative diagnosis was rare. The Sistrunk procedure is recommended for initial surgical therapy with further surgical or adjuvant therapy dependent on associated clinical findings. Prognosis for carcinoma of the thyroglossal duct of thyroid type parallels that of carcinoma of the thyroid gland.

Adenocarcinoma, Papillary↗