36-year-old otherwise healthy female presented with an atypical pap smear. Biopsy of cervix revealed poorly Differentiated Neuroendocrine Carcinoma. Immunohistochemical staining showed the cells positive for NSE, SYN, CHR, and 90% positive for Ki67 (proliferative index). The findings of the PET-FDG test showed pathological absorption of FDG as a primary tumor of the cervix, towards the left side of the body. Moreover, evidence is seen of nodal metastatic spread in the retroperitoneum and pelvis, mainly on the left.

75-year-old male with a cutaneous squamous cell carcinoma resected from the right eyebrow in 2003. In 2006, the patient underwent resection of an ipsilateral squamous cell carcinoma in the parotid bed that was presumably a nodal metastasis. He then experienced local relapse treated with resection and adjuvant radiotherapy. There was recurrent disease involving the right cheek excised in 2008. In 2009, another recurrence led to resection with orbital exenteration. Pathology showed squamous cell carcinoma, with perineural invasion, and extension into the orbital muscles.

52-year-old male was diagnosed in 2004 with a carcinoma of the lower rectum and underwent surgical anterior resection of the rectal tumor which was a well differentiated adenocarcinoma. In 2008 he underwent emergency operation for a perforated pyloric ulcer and then a radical resection of a gastric tumor which infiltrated the entire thickness of the gastric wall. It was a G3 diffuse type adenocarcinoma with signet ring cells, at pT3N2 stage.