ECTOPIC THYROID - ECTOPIC THYROID Lingual Thyroid A lingual...

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ECTOPIC THYROID Lingual Thyroid A lingual thyroid is relatively rare and is estimated to occur in 1 in 3000 cases of thyroid disease. However, it represents the most common location for functioning ectopic thyroid tissue. Lingual thyroid tissue is associated with an absence of the normal cervical thyroid in 70% of cases. It occurs much more commonly in women than in men. The diagnosis is usually made by the discovery of an incidental mass on the back of the tongue in an asymptomatic patient (Fig. 19). The mass may enlarge and cause dysphagia, dysphonia, dyspnea, or a sensation of choking. 75 Hypothyroidism is often present and may cause the mass to enlarge and become symptomatic, but hyperthyroidism is very unusual. In women, symptomatic lingual thyroid glands develop during puberty or early adulthood in most cases. Buckman, in his review of 140 cases of symptomatic lingual thyroids in females, reported that 30% occurred in puberty, 55% between the ages of 18 and 40 years, 10% at menopause, and 5% in old age. 76
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ECTOPIC THYROID - ECTOPIC THYROID Lingual Thyroid A lingual...

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