Mucinous Adenocarcinoma Arising in Chronic Perianal Fistula: Good Results with Neoadjuvant Chemoradiotherapy Followed by Surgery

Figure 1

The diagnosis.

(a) Perianal tumor

(b) Internal opening of the fistula

(c) After surgical biopsy

(d) Histological biopsy result: mucinous adenocarcinoma