A Rare Case of Ruptured Tailgut Cyst Leading to Carcinomatosis

Figure 2

Immunohistochemical stains. The atypical areas stain positive for CDX2 (a) and patchy positive for CK20 (b). The tumor cells are negative for CK7 (c) and synaptophysin (d).

(a)

(b)

(c)

(d)