Coexistence of papillary thyroid cancer and Hashimoto's thyroiditis developing within an ovarian mature cystic teratoma

Abstract

A wide variety of tissues derived from the three germ layers are seen in ovarian teratomas. Microscopically, the most commonly seen tissues are epidermis, skin adnexa, and neural tissues. Thyroid tissue is present in 10% of ovarian mature cystic teratomas. In this case, report, we present a rare case of papillary microcarcinoma derived in the ovarian teratoma and Hashimoto's thyroiditis with the normal level of serum thyroid hormones, which is normal but positive serum antithyroid peroxidase antibodies.

A rare case of synchronous follicular thyroid carcinoma arising within a mature cystic ovarian teratoma and stage IV differentiated thyroid cancer in iodine-deficient area in Viet Nam

“…7 Since then, five additional cases have been reported, but none were FTC. [8][9][10][11][12] Follicular thyroid carcinoma is more common in iodine-deficient areas. 3 Our patient lived in the Mekong Delta, Viet Nam.…”

Hashimoto's thyroiditis‑induced cryptogenic organizing pneumonia: A case report

“…If serum TPOAb and TgAb are significantly increased, the diagnosis may be confirmed. Following a diagnosis of HT, one should pay attention to the emergence of thyroid tumours and clinical hypothyroidism (8–11). At present, the treatment of HT is based replacement of deficient innate thyroid hormone production with levothyroxine, an exogenous thyroid hormone.…”

“…Subacute thyroiditis is associated with viral infections and is self-limited, usually without any long-term sequelae. HT is easy to confuse with certain types of thyroid tumour (8–11), requiring careful diagnostic attention.…”

“…This results in diffuse or uneven nodularity. HT is accompanied by thyroid tumours (8–11) and hypothyroidism but rarely causes COP. It has been reported that the prevalence of HT with papillary thyroid carcinoma is 0.5–38% (10).…”