title: Precursor B lymphoblastic lymphoma involving the stomach.
abstract: Precursor B lymphoblastic lymphoma is a high-grade neoplasm arising from precursor lymphocytes of B-cell lineage. Extranodal sites such as the skin and bone are often involved, but gastrointestinal lesions of this disease are rarely encountered. Due to the infrequency, macroscopic forms of the gastrointestinal lesions have not been fully described. In this report, we present a case of precursor B lymphoblastic lymphoma involving the stomach, pancreas, bone, and bone marrow. Esophagogastroduodenoscopy showed multiple flat elevated lesions with irregular mucosa in the stomach.
authors.affiliation: Department of Gastroenterology, Onomichi Municipal Hospital, Onomichi 722-8503, Japan ; Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama 700-8558, Japan.
authors.forename: Masaya
authors.initials: M
authors.lastname: Iwamuro
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Kawai
authors.forename: Yasuhide
authors.initials: Y
authors.lastname: Yamawaki
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Takata
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Yamamoto