title: [A case of primary pulmonary non-Hodgkin's lymphoma showing a fine granular pattern around the main tumor on thin-slice CT].
abstract: A 61-year-old woman was admitted for evaluation of an abnormal shadow found incidentally on a chest radiograph. A 35 x 20 mm nodule with an ill-defined margin was found at the left hilum on conventional CT. Thin-slice (2 mm) CT was done, and a fine granular zone was found around the lesion. Left upper lobectomy was done and the lesion proved to be a primary pulmonary non-Hodgkin's lymphoma (small cell type, B-cell). The granular pattern seen on CT was found to correspond to intraseptal micronodules scattered along the lymphatic vessels, a finding which is considered to be pathognomonic of pulmonary lymphomas by many pathologists. We know of no previous description of how these histologic characteristics can appear on high-resolution thin-slice CT. These findings will be helpful for the CT diagnosis of pulmonary lymphoma.
authors.affiliation: Department of Internal Medicine, Social Health Insurance Medical Center, Tokyo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Tokuda
authors.forename: S
authors.initials: S
authors.lastname: Kitamura
authors.forename: K
authors.initials: K
authors.lastname: Nakagawa
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging*; D008875:Middle Aged; D011856:Radiographic Image Enhancement / Q000379:methods*; D014057:Tomography, X-Ray Computed