Thyroid Carcinoma on the Side of the Absent Lobe in a Patient with Thyroid Hemiagenesis

Figure 6

Three hypotheses for tumorigenesis in the present case. (a) Hypoplasia of the left thyroid lobe plus thyroid cancer occurring on the hypoplastic side, with tumor replacing the hypoplastic tissue. (b) Thyroid hemiagenesis plus thyroid microcancer plus lymph node metastasis. (c) Thyroid hemiagenesis plus ectopic thyroid on the side of the absent gland plus ectopic thyroid carcinoma.

(a)

(b)

(c)