Recurrent Adult Sacrococcygeal Teratoma Developing Adenocarcinoma: A Case Report and Review of Literatures

Figure 5

Microscopic examination of the recurrent tumor showing invasive, moderately differentiated adenocarcinoma. The tumor cell islands displayed an infiltrative pattern at 10x magnification (a), with marked structural and cellular atypia demonstrated at 40x magnification (b). The malignant glands showed a high proliferative index on Ki-67 (c), while p53 was wild-type (d).

(a)

(b)

(c)

(d)