title: Clinical challenges and images in GI. Anal tumor with refractory hypercalcemia.
authors.affiliation: 2nd Surgical Department and Surgical Oncology Unit, Korgialenio - Benakio, Red Cross Hospital, Athens, Greece.
authors.forename: George
authors.initials: G
authors.lastname: Sgourakis
authors.forename: Sophocles
authors.initials: S
authors.lastname: Lanitis
authors.forename: Constantine
authors.initials: C
authors.lastname: Karaliotas