title: Precursor B-cell lymphoblastic lymphoma involving the skin.
abstract: Precursor B-cell lymphoblastic lymphoma (B-LBL) is a rare neoplasm composed of immature lymphocytes that demonstrate lymphoblastic morphology and express precursor and B-cell marker. It usually affects people of younger age group and causes multiple nodules on the head and neck area. The neoplasm is rare in old age. We report a case of B-LBL occurring in a 65-year-old man. He presented with multiple skin nodules on the scalp, the neck and the arm for 2 months. Histopathologic examination demonstrated diffuse dermal and subcutaneous monotonous infiltrates of medium-sized lymphoid cells with starry-sky pattern. Immunohistochemical study showed that the lymphoid cells of infiltrate showed precursor B-cell type. The patient has received combination chemotherapy three times and is being followed-up at the outpatient clinic.
authors.affiliation: Department of Dermatology, Ajou University School of Medicine, Suwon, South Korea.
authors.forename: Ji-Yeon
authors.initials: JY
authors.lastname: Kim
authors.forename: You Chan
authors.initials: YC
authors.lastname: Kim
authors.forename: Eun-So
authors.initials: ES
authors.lastname: Lee
mesh_terms: D000368:Aged; D015703:Antigens, CD / Q000378:metabolism; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D006801:Humans; D007150:Immunohistochemistry; D016393:Lymphoma, B-Cell / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology*; D008297:Male; D012878:Skin Neoplasms / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology*; D013234:Stem Cells / Q000378:metabolism / Q000473:pathology*
chemical_list: D015703:Antigens, CD