“…More than 80% of those are squamous cell carcinoma, but other histologic types such as adenocarcinomas, malignant melanomas, and sarcomas also occur [17] . There are also reported cases for neuroendocrine carcinomas, lymphoma and extragastrointestinal stromal tumors though these are extremely rare [17][18][19][20] . The radiological appearance of those malignant lesions are likely to be ill-defined and irregular with an infiltrative or a lobulated mass.…”