PMID- 16952043 OWN - NLM STAT- MEDLINE DCOM- 20070124 LR - 20181113 IS - 1436-3291 (Print) IS - 1436-3291 (Linking) VI - 9 IP - 3 DP - 2006 TI - Helicobacter pylori-negative / API2-MALT1 translocation-negative low-grade MALT lymphoma. PG - 229-34 AB - A 71-year-old man with a Helicobacter pylori infection-negative and API2-MALT1 translocation-negative extranodal marginal-zone B-cell lymphoma of mucosa-associated lymphoid tissue (MALT) type of the stomach has been followed conservatively for over 5 years. The lesion has shown no major morphological changes or malignant progression into a diffuse large-cell type during the time course. The absence of genetic translocation of API2-MALT1 was confirmed with fluorescence in situ hybridization (FISH). The prognosis of H. pylori-negative and API2-MALT1 translocation-negative low-grade MALT lymphoma is unknown, and a standard treatment for such lymphoma has yet to be defined. The case of MALT lymphoma negative for both of the above factors that we report has shown no obvious rapid progression or malignant change over the long-term course. Although curative operation and/or chemoradiotherapy should still be discussed as the treatment of choice, the treatment of this type of lymphoma must be carefully determined on a case-by-case basis, according to its biological status and prognosis. FAU - Nozaki, Koji AU - Nozaki K AD - Department of Gastrointestinal Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan. FAU - Nomura, Sachiyo AU - Nomura S FAU - Shimizu, Nobuyuki AU - Shimizu N FAU - Hiki, Naoki AU - Hiki N FAU - Yoshizawa, Nao AU - Yoshizawa N FAU - Aikou, Susumu AU - Aikou S FAU - Kubota, Keisuke AU - Kubota K FAU - Yamaguchi, Hirokazu AU - Yamaguchi H FAU - Kurosaka, Hanzo AU - Kurosaka H FAU - Shinozaki, Aya AU - Shinozaki A FAU - Mafune, Ken-ichi AU - Mafune K FAU - Fukayama, Masashi AU - Fukayama M FAU - Kaminishi, Michio AU - Kaminishi M LA - eng PT - Case Reports PT - Journal Article PL - Japan TA - Gastric Cancer JT - Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association JID - 100886238 RN - 0 (API2-MALT1 fusion protein, human) RN - 0 (Oncogene Proteins, Fusion) SB - IM MH - Aged MH - Gastroscopy/methods MH - Helicobacter pylori/*isolation & purification MH - Humans MH - Lymphoma, B-Cell, Marginal Zone/*diagnosis/metabolism/*microbiology MH - Lymphoma, Non-Hodgkin/*diagnosis/genetics/microbiology MH - Male MH - Oncogene Proteins, Fusion/*genetics MH - Stomach Neoplasms/*diagnosis/metabolism/microbiology MH - *Translocation, Genetic EDAT- 2006/09/05 09:00 MHDA- 2007/01/25 09:00 CRDT- 2006/09/05 09:00 PHST- 2005/11/10 00:00 [received] PHST- 2006/02/10 00:00 [accepted] PHST- 2006/09/05 09:00 [pubmed] PHST- 2007/01/25 09:00 [medline] PHST- 2006/09/05 09:00 [entrez] AID - 10.1007/s10120-006-0367-6 [doi] PST - ppublish SO - Gastric Cancer. 2006;9(3):229-34. doi: 10.1007/s10120-006-0367-6.