Slide 186.Mature cystic teratoma, Ovary

A. Brief Descriptions:



  1. Teratoma: true neoplasm derived from totipotential cells and composed of a variety of parenchymal cell types representative of more than one germ layer, usually all three.

  2. Mature teratoma: teratoma composed of mature elements indistinguishable with normal tissue; benign and cystic.

B. Gross Findings:

  1. Uniloculated or multiloculated cystic cavities filled with fatty or sebaceous material and hair ”dermoid cyst”.

C. Micro Findings:

  1. Ectoderm: The cystic lesion is lined by skin with its sebaceous glands and hair follicles.

  2. Mesoderm: fibrous and fatty tissue.

  3. Endoderm: thyroid tissue with thyroid follicles of various sizes.

D. Others:

  1. Compare with dermoid cyst,ovary (slide 38) and teratoma,tesis (slide 39).

E. Reference:

  1. Robbins Pathologic Basis of Disease, 6th ed.  P.1073-1074.



Fig. 186-1 (LP)Mature skin with sebaceous glands and hair follicles.




Fig. 186-2 (LP)Mature sweat glands and adipose tissue.




Fig. 186-3 (LP)Mature hair follicles, adipose tissue and vessels.




Fig. 186-4 (LP)Mature thyroid follicles.