Gastric CD30-positive anaplastic large-cell lymphoma is a very rare disease. It is sometimes difficult to distinguish it from undifferentiated carcinoma, sarcoma and so on. We report here on a case of primary gastric anaplastic large-cell lymphoma. A 50-yr-old woman complained of epigastric pain and severe chest pain for 1 week. The gastroendoscopic examination revealed geographic mucosal irregularities with shallow ulceration at the antrum. She underwent a total gastrectomy. The gross finding of the resected stomach was an 8 x 4.5 cm sized ulceroinfiltrative lesion at the pyloric antrum along the lesser curvature. The microscopic examination revealed diffuse and solid proliferations of large atypical cells with pleomorphic nuclei. Immunohistochemically, the tumor cells were positive for CD30, vimentin and CD3, and this was a finding compatible with anaplastic large-cell lymphoma. To the best of our knowledge, this is the first such reported case in Korea.
Antigens, CD30/*metabolism ; Female ; Humans ; Immunohistochemistry ; Korea ; Lymphoma, Large-Cell/enzymology/*immunology/*pathology ; Middle Aged ; Protein-Tyrosine Kinase/metabolism ; Stomach Neoplasms/enzymology/*immunology/*pathology

The incidence of posttransplantation lymphoproliferative disorders (PTLDs) has increased in recent years. Although rare, various types of T-cell lymphoma have been reported and their association with Epstein-Barr virus (EBV) has been compared with B-cell PTLDs. We report a case of splenic peripheral T-cell lymphoma occurring in a 47-yr-old male patient 7 yr after renal allograft transplantation. The spleen showed sinusoidal proliferation of focal CD30 positive, large, atypical lymphoid cells. Positivity for CD3 and cytolytic granule-associated proteins was also demonstrated in the tumor cells, while anaplastic large cell lymphoma kinase (ALK) and CD8 were not expressed. Strong nuclear signals for EBV mRNA were noted by EBER1 in situ hybridization. A molecular genetic study demonstrated a rearrangement of the gamma T-cell receptor gene. To our knowledge, this case is unique in terms of a posttransplant T-cell lymphoma that shows focal CD30, cytolytic granule-associated proteins, and EBV positivity.
Antigens, CD30/genetics ; Antigens, CD30/metabolism ; Herpesvirus 4, Human/genetics ; Herpesvirus 4, Human/metabolism* ; Human ; Kidney Transplantation* ; Lymphoma, T-Cell, Peripheral/pathology ; Lymphoma, T-Cell, Peripheral/virology* ; Male ; Membrane Proteins/metabolism ; Middle Aged ; RNA, Viral ; RNA-Binding Proteins/metabolism ; Serine Endopeptidases/metabolism ; Splenic Neoplasms/pathology ; Splenic Neoplasms/virology*