ヤマノイモ属（ヤマノイモ科）の系統と分類学的再検討

京都大学0048新制・課程博士博士(理学)甲第22631号理博第4620号新制||理||1664(附属図書館)京都大学大学院理学研究科生物科学専攻(主査)教授 田村 実, 教授 工藤 洋, 教授 永益 英敏学位規則第4条第1項該当Doctor of ScienceKyoto UniversityDGA

Geological Significance of Anadara (Hataiarca) kakehataensis Hatai and Nisiyama in the Arcid-Potamid Fauna in Japan

The chronostratigraphic distribution of Anadara (Hataiarca) kakehataensis species group in relation with the Arcid-Potamid fauna is discussed, and correlation and classification of the species are undertaken

Temporal association of vitreous hemorrhage and hypertension after COVID‐19 mRNA vaccines

Vitreous hemorrhage as common eye presentation and hypertension as common systemic presentation are difficult to designate whether they are coincidental or causal in terms of adverse events of COVID-19 vaccinations. Temporal association of hypertension and vitreous hemorrhage was noted in a patient repeatedly after the second and third COVID-19 vaccinations

Molluscan fossils from the Ryukyu Islands,Southwest Japan : Part 4, Gastropoda and Pelecypoda from the Nakoshi Formation in the Motobu Peninsula,Okinawa-jimam

A total 110 species of 68 bivalves and 42 gastropods are described from the Nakoshi Formation in the Motobu Peninsula, central part of Okinawa-jima Island, The Nakoshi molluscan fauna is of embaymental shallow marine (lowerpart of the Nakoshi Formation) to infaunal and open marine species (upper part of the Formation). The faunal association in total is quite different in composition from the fauna of the Chinen Sand or underlying the Shimajiri Group distributed in the southeern part and centarl part of Okinawa-jima

Turciculid Gastropoda of Japan

Sixteen turciculid gastropod species, Recent and fossil are described from Japan. Those species are distributed among one genus Turcicula and the four subgenera; Turcicula s.s, Bathybembix, Ginebis and Gonvexia. The last mentioned subgenus is newly proposed and Ginebis is redefined and discussed, because of the confusion concerning its classification. Foreign and allied species of Turcicula are remarked based upon the nomenclature. In the classification of the species, letter formulae are proposed for the external morphological characters. It is noteworthy that the biogeographical distribution of the group is recognized at the subgeneric level. Prior to Pliocene, the species of the subgenus Turcicula had been known only from the Japan Sea side (Japan Sea Type), but these are found on the Pacific Ocean side of Japan from Pliocene to Recent. On the contrary, the species belonging to the subgenera, Bathybembix, Ginebis and Convexia were previousely known only from the Pacific Ocean side of Japan through the geological past to Recent and have been known as the Pacific Ocean Type. From the Recent distribution of the subgenus Ginebis, the Pacific Ocean side of Japan can be classified into two provinces; the northern and the southern being separated at the sea off Boso Peninsula, middle Honshu. Phylogenetically, though more data are needed, the origin of some stocks are now estimated based upon their external morphological development. Fossil turciculid gastropods might be important for geological interpretation especially of the paleogeography and the development of their tubercles are useful for ecological analysis of the sediments deposited off shore or on the continental slope

A case of esophageal atresia with the bronchial-like lower esophagus which originates from the left lower lobe bronchus

Background Esophageal atresia with or without a trachea-esophageal fistula occurs due to the failure of separation or incomplete development of the foregut. Therefore, esophageal atresia is often associated with various forms of tracheobronchial anomalies. We report an extremely rare case of esophageal atresia. Case presentation A female infant was born at 37 weeks of gestation and weighed 2596 g. A diagnosis of esophageal atresia and total anomalous pulmonary vein return type III were confirmed. The infant had respiratory distress that required tracheal intubation and ventilatory support soon after birth. Temporary banding of the gastroesophageal junction and gastrostomy were performed on the second day of life. However, her respiratory condition deteriorated due to atelectasis of the left lung and compensatory hyperinflation of the right lung. Preoperative examinations showed the unilobe and atelectatic left lung. The trachea was trifurcated in three directions, and the branch that was expected to be the left main bronchus was blind-ended. The dorsal branch was cartilaginous and bifurcated into the left lower lobe bronchus and lower esophagus approximately 1 cm distal from the tracheal trifurcation. The cartilaginous tissue continued to the lower esophagus. The diagnosis of esophageal atresia with the lower esophagus which originated from the left lower lobe bronchus was made. Esophageal atresia repair was performed when the patient was 4 months of age. The esophagus was dissected distally to the bifurcation of the left lower lobe bronchus via right thoracotomy. The lower esophagus was bronchial-like in appearance, transitioning to the normal esophageal wall approximately 7 mm distal to the transected edge. The cartilage tissue was completely resected during surgery, and a primary end-to-end anastomosis of the esophagus was successfully performed. Histopathological findings revealed that the extracted specimen was surrounded by tracheal cartilage and that the inner surface was covered by stratified squamous epithelium that originated from the esophagus. Conclusions In cases of esophageal atresia with an atypical clinical presentation, there may be unique structural abnormalities of the foregut. We emphasize the importance of a preoperative surgical planning since an inadequate operation can lead to fatal complications

A case of esophageal atresia complicated by a right-sided aortic arch with right ductus arteriosus and inferior vena cava interruption with hemiazygos continuation

During the repair of esophageal atresia with tracheoesophageal fistula (EA/TEF), cardiovascular malformations occasionally create a technical challenge. We report a novel case of a 4-day-old girl with EA/TEF and multiple cardiovascular malformations, including right-sided aortic arch (RAA), right ductus arteriosus (RDA), single ventricle with single atrium, common atrioventricular valve, pulmonary atresia, bilateral superior vena cava, and interruption of the inferior vena cava (IVC) with hemiazygos continuation. In this case, a right-sided approach would require the mobilization of the RAA and RDA, which were supplying the pulmonary blood flow due to pulmonary atresia. Alternatively, the left-sided approach would require the mobilization of the hemiazygos vein, which was essential for venous return from the lower body due to IVC interruption. We performed the less intrusive left-sided approach, and the postoperative course was uneventful. Right-sided EA/TEF repair should be avoided because RDA spasm or injury caused by RAA mobilization would be fatal. In cases of interrupted IVC with azygos or hemiazygos vein continuation, care must be taken not to ligate these vessels or block the venous return. Preoperative evaluation is important to prevent complications in such complicated cases. If sufficient information is not available, the left-sided approach may be preferred