Needle tract implantation clearly visualized by computed tomography following needle biopsy of malignant mesothelioma.
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Biopsy, Needle↗
Biomedical subjects
Kazuhito Funai
Publications and source records attributed to Kazuhito Funai.
Differences in clinicopathological and biological features between central-type and peripheral-type squamous cell carcinoma of the lung.
The central type and peripheral type squamous cell carcinoma (SCC) of the lung have different clinicopathological characteristics, but, little is known about their biological characteristics. We investigated differences between the properties and phenotypes of peripheral-type (P-type) and central-type (C-type) SCC by performing an immunohistochemical analysis of each type by tissue microarray analysis with a large panel of antibodies. To examine strictly, we selected 20 P-type SCCs that were pathological stage T1 and limited to more peripherally than the fifth bronchial bifurcation, and 21 C-type SCCs that were pathological stage T1 and limited to a lobar bronchus. The results of the clinicopathological study showed that the patients with P-type SCC were significantly older than the patients with C-type SCC and that squamous metaplasia was predominant in C-type SCC than in P-type SCC. The 36 antibodies revealed different expression patterns of cytokeratin 7 (CK 7) and cytokeratin 19 (CK 19) between C-type and P-type SCC. CK 7 expression was more predominant in P-type SCC than in C-type SCC, and CK 19 expression was more predominant in C-type SCC than in P-type SCC. These results suggest that C-type and P-type SCC have different clinicopathological and biological features.
Adult↗
Frequent overexpression of the c-kit protein in large cell neuroendocrine carcinoma of the lung.
Overexpression of receptor-type tyrosine kinases in various cancers is associated with an aggressive tumor phenotype and poor outcome, but their expression had never been evaluated in large cell neuroendocrine carcinoma (LCNEC) of the lung. In the present study, we investigated the expression of three receptor tyrosine kinases, epidermal growth factor receptor (EGFR), c-erbB-2, and c-kit protein, by comparing surgically resected 40 LCNECs with other neuroendocrine (NE) lung tumors: 9 typical carcinoids (TCs), 5 atypical carcinoids (ACs), and 13 small cell lung carcinomas (SCLCs). None of the NE lung tumors showed expression of EFGR or c-erbB-2, but c-kit was overexpressed in 55% of the LCNEC tumor cells and 46% of the SCLC tumor cells. None of the clinicopathologic factors in either the LCNEC or SCLC patients correlated with c-kit overexpression. The finding that c-kit expression in LCNEC is similar to its expression in SCLC suggests that inhibition of c-kit may be effective as a therapy targeting LCNEC as well as SCLC.
Adenocarcinoma↗
Clinicopathologic characteristics of peripheral squamous cell carcinoma of the lung.
Squamous cell carcinoma of the lung can be divided into two types according to the location of the primary site: the central type and the peripheral type. The clinicopathologic factors in the peripheral type of lung squamous cell carcinoma have not yet been fully evaluated. A total of 204 surgically resected lung squamous cell carcinomas were reviewed with special reference to their location, histologic characteristics based on tumor growth patterns, and clinicopathologic factors. The central type and the peripheral type accounted for 95 and 109 cases, respectively. Although the patient population of the peripheral type was older, with a lower pathologic stage, lower lymphatic vessel involvement, and lymph node metastasis, the Kaplan-Meier survival proportions did not differ significantly between these two groups. Based on the histologic growth pattern, the peripheral type was classified under three subgroups as follows: 1). the alveolar space-filling type, 2). the expanding type, and 3). the combined type. Among these three types, the alveolar space-filling type showed neither lymphatic vessel invasion nor lymph node metastasis and had the most favorable prognosis. The central and peripheral types of lung squamous cell carcinoma have different clinicopathologic characteristics and should be classified under respectively different categories.
Adult↗
Gastric carcinoma resembling submucosal tumor.
Acase of stomach carcinoma showing features of submucosal tumor is reported. The patient was a 50-year-old man presenting with hematemesis. Endoscopic examination was performed and revealed a submucosal tumor-like lesion with central ulceration in the fornix of the stomach. The biopsy specimen from this lesion showed poorly differentiated adenocarcinoma, and surgery was performed. The tumor, measuring 3.5 x 2.7 cm in size, invaded to the muscularis propria with proliferation of the interstitial connective tissue and lymphoid follicles consisting mainly of B lymphocytes in the submucosal layer. In situ hybridization of tumor tissue for Epstein-Barr virus (EBV)-encoded small RNA1 as target revealed negative results. In stomach carcinoma simulating submucosal tumor, as in this patient, preoperative diagnosis is important to plan treatment strategies.
Journal Article↗