Seasonal cycle of the nest composition in the Ponerine ant Cryptopone sauteri (Hymenoptera: Formicidae)

The annual life history is a basic and important factor in ecological studies on temperate ant species. The biology of Ponerinae species has been studied for many species, but little attention has been paid to their life history. Cryptopone sauteri is one of the most common ants in temperate regions of Japan. However, there is no quantitative information on the life history of this species. We report seasonal changes in brood development, the emergence of reproductives and social structures of C. sauteri. Additionally, we discuss that this species possibly exhibits a polydomous nesting system

A Case of Pill-Induced Esophagitis With Mucosal Dissection

With the advance of gastrointestinal endoscopy, pill-induced esophagitis has been detected more frequently, but the association of mucosal dissection is rare. We reported a case of pill-induced esophagitis associated with mucosal dissection

初回治療から6年後に肺転移にて再発した子宮頸部中腎管腺癌の一例

子宮頸部に発生する中腎管腺癌は中腎管の遺残組織から発生する稀な子宮頸部腫瘍である。今回，初回治療から6年経過後に肺転移にて再発した子宮頸部中腎管腺癌の一例を経験したので文献的考察を加え報告する。症例は初発時年齢69歳女性，3妊2産。腰痛を主訴に近医産婦人科を受診。子宮腫大を認め，子宮頸部細胞診は異常を認めず，子宮内膜細胞診が陽性（腺癌）のため当科紹介となった。経腟超音波断層検査で子宮頸部に4cm大の充実性腫瘤を認め，子宮鏡検査では腫瘍は頸管内に突出していた。この部位から生検したところ，中腎管腺癌が疑われた。子宮頸部中腎管腺癌の診断にて広汎子宮全摘術と両側付属器切除を施行した。術後の病理組織検査でも中腎管腺癌であることが確認され，腫瘍は子宮頸部から腟壁に及び，右傍子宮組織にも浸潤していた。進行期は子宮頸部中腎管腺癌IIB期であり，術後補助療法として同時化学放射線療法を行った。子宮頸癌手術より6年目に左肺野の病変とCA19-9の上昇を認めた。左肺上葉部分切除を行ったところ中腎管腺癌の再発であった。左肺上葉部分切除18か月後に，右肺野腫瘤の増大を認め中腎管腺癌の再々発の診断となった。これに対してCPT-11の単剤治療3コース実施したところ，右肺野の腫瘤は縮小した。現在，子宮頸癌術後108か月時点でパフォーマンスステータス0の担癌生存の状態である。子宮頸部中腎管腺癌はその発生学的な特徴より術前診断が困難であり，子宮頸部細胞診に異常を認めない場合でも，子宮頸部に充実性病変を認める場合には，本疾患の存在を念頭に置く必要がある。また，本症例のように術後6年経過しても再発する場合があり，長期間のフォローアップが必要である。In this case report, we present a rare case of mesonephric adenocarcinoma of the cervix that recurred with pulmonary metastases six years after initial treatment. At first presentation, the patient was a 69-year-old woman, gravida 3 para 2. She presented to a clinic with a chief complaint of lower back pain. She was referred to our hospital because she had an enlarged uterus, cervical cytology showed no abnormalities and endometrial cytology was positive. Transvaginal ultrasound revealed a substantial cervical mass measuring 4 cm, and a biopsy from this site suggested mesonephric adenocarcinoma. A radical hysterectomy and bilateral adnexectomy were performed, and histopathology confirmed the presence of mesonephric adenocarcinoma with extension from the cervix to the vaginal wall and invasion of the right parametrium. The final clinical stage was stage IIB mesonephric adenocarcinoma of the cervix, and concurrent chemoradiotherapy was given as adjuvant therapy. Six years after surgery for cervical cancer, lesions in the left lung field and elevated CA19-9 were observed. Partial resection of the upper lobe of the left lung revealed a recurrence of mesonephric adenocarcinoma. 18 months later, an enlarged mass was found in the right lung field and a diagnosis of recurrent mesonephric adenocarcinoma was made. After three courses of CPT-11 chemotherapy, the mass in the right lung field shrank and the patient is currently alive with a performance status of 0, 108 months after surgery for cervical cancer. Mesonephric adenocarcinoma of the cervix is a rare and challenging disease to diagnose preoperatively due to its embryological features. The presence of a solid lesion on the cervix, even in the absence of abnormal cervical cytology, should raise suspicion for this disease. Long-term follow-up is crucial as recurrence can occur several years after surgery