シカクホタルイの分類学的研究

Schoenoplectiella ×trapezoidea (Koidz.) J. Jung & H.K. Choi has been treated as a hybrid between S. hotarui (Ohwi) J. Jung & H.K. Choi and S. triangulata (Roxb.) J. Jung & H.K. Choi or S. juncoides (Roxb.) Lye and S. triangulata. However, we found two morphological types of S. ×trapezoidea in a population of Makinocho, Shiga Pref., Japan. One has slender trigonal to pentagonal culms, shorter spikelets, and high seed fertility (A-type), and the other has thicker irregularly rather sharp tetragonal to pentagonal culms, longer spikelets often twisted at the upper part, and low seed fertility (B-type). We carried out cytological, morphological and reproductive studies of both types of S. ×trapezoidea together with its presumed parent species, S. hotarui, S. juncoides and S. triangulata, from the populations and nearby fallow field. Chromosome number of S. hotarui, S. triangulata, and A-type with 2n = 42, B-type with 2n = 58 and S. juncoides with 2n = 74 were found. A-type is mainly growing between S. hotarui and S. triangulata in the population and showed intermediate morphology between them so, A-type is not inconsistent with a hybrid between S. hotarui and S. triangulate. A-type also showed lower pollen stainability and seed fertility than parental species, which might support the hybrid origin of A-type. Meanwhile, B-type (2n = 58) well showed intermediate chromosome number and morphology between S. trapezoidea (2n = 42) and S. juncoides (2n = 74). Moreover, as B type showed many monovalents and heteromorphic trivalents in meiosis configurations, low pollen stainability and seed fertility, it is highly possible that B-type is a hybrid between S. juncoides and S. triangulata. The examination of the type specimens showed that the name S. trapezoidea should be retained for ‘S. trapezoidea (A type)’, a hybrid ‘S. hotarui × S. triangulata’ although we could not clearly show that this plant is really a hybrid in the present study. For ‘S. trapezoidea (B type)’, we proposed a name Schoenoplectiella ×yashiroi J. Oda & Nagam., hybr. nov. for a hybrid S. juncoides × S. triangulata

Malignant pleural mesothelioma with long-term tumor disappearance of a local relapse after surgery: a case report

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骨粗鬆性脊椎骨折に対する骨切り矯正術におけるFEMを用いた力学的解析 : 骨脆弱性と矯正時のアライメントが再建脊椎に及ぼす応力増加について

金沢大学医学部附属病院リハビリテーション部学会抄

骨粗鬆症椎体における骨折発生機序の生体力学的検討

金沢大学医学部附属病院リハビリテーション部学会抄

Etiological factors in primary hepatic B-cell lymphoma

Sixty-four cases of malignant lymphoma involving the liver were examined. Of these, 20 cases were histologically confirmed to be primary hepatic B-cell lymphoma. Twelve of these 20 cases were diffuse large B-cell lymphoma (DLBCL) and eight cases were mucosa-associated lymphoid tissue (MALT) lymphoma. Of the 12 cases of DLBCL, six were immunohistologically positive for CD10 and/or Bcl6 (indicating a germinal center phenotype), six were positive for Bcl2, and five were positive for CD25. Eight of the 12 DLBCL cases (66.7%) and two of the eight MALT lymphoma cases (25%) had serum anti-hepatitis C virus (HCV) antibodies and HCV RNA. The incidence of HCV infection was significantly higher in the hepatic DLBCL cases than in systemic intravascular large B-cell cases with liver involvement (one of 11 cases, 9.1%) and T/NK-cell lymphoma cases (one of 19 cases, 5.3%) (p < 0.01 for both). Two hepatic DLBCL cases (16.7%) had rheumatoid arthritis treated with methotrexate, and four MALT lymphoma cases (50%) had Sjögren’s syndrome, primary biliary cirrhosis, or autoimmune hepatitis; one case in each of these two groups was complicated by chronic HCV-seropositive hepatitis. Although primary hepatic lymphoma is rare, persistent inflammatory processes associated with HCV infection or autoimmune disease may play independent roles in the lymphomagenesis of hepatic B cells