MUCINOUS CYSTADENOCARCINOMA
\mjˈuːsɪnəs sˌɪstɐdənˌɒkɑːsɪnˈə͡ʊmə], \mjˈuːsɪnəs sˌɪstɐdənˌɒkɑːsɪnˈəʊmə], \m_j_ˈuː_s_ɪ_n_ə_s s_ˌɪ_s_t_ɐ_d_ə_n_ˌɒ_k_ɑː_s_ɪ_n_ˈəʊ_m_ə]\
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A malignant cystic or semisolid tumor most often occurring in the ovary. Rarely, one is solid. This tumor may develop from a mucinous cystadenoma, or it may be malignant at the onset. The cysts are lined with tall columnar epithelial cells; in others, the epithelium consists of many layers of cells that have lost normal structure entirely. In the more undifferentiated tumors, one may see sheets and nests of tumor cells that have very little resemblance to the parent structure. (Hughes, Obstetric-Gynecologic Terminology, 1972, p184)
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