[Surgical Case of the Primary Pulmonary Leiomyosarcoma:Report of a Case].

A 70-year-old man was referred for an abnormal chest shadow. Enhanced computed tomography (CT) revealed a well-circumscribed lung tumor of 53 mm in diameter in the left upper lobe with slight enhancement. Positron emission tomography-CT showed a high maximum standardized uptake value for the tumor but no metastasis in the lymph nodes or other organs. Although a definitive diagnosis could not be made by transbronchial biopsy, the tumor was highly suspected to be malignant based on the radiological findings, and a left upper lobectomy with mediastinal lymph nodes dissection was performed for definitive diagnosis and treatment. A pathological examination showed the tumor to be composed of mitotic spindle-shaped cells, which were positive for α-smooth muscle actin, desmin, and caldesmon. The MIB-1 labelling index was 60~70%. According to these pathologic findings, the tumor was identified as a leiomyosarcoma. Metastases to the skin of chest and hilar lymph nodes were noted six months after the surgery for which radiotherapy was performed.

[Thoracoscopic Surgery for Lung Cancer Invading the Superior Chest Wall].

We herein report a case of a 73-year-old man with lung cancer who underwent thoracoscopic right upper lobectomy with combined resection of the superior chest wall. His tumor was 48 mm in diameter and located in the posterior right lung apex involving the chest wall between ribs 1 and 3. The anterior aspects of the ribs 2 and 3 were separated using forceps under thoracoscopic vision. The first rib could be released from the tumor by peeling off the parietal pleura. An 8 cm incision was made posteriorly between the scapula and vertebrae to obtain the posterior aspect of the ribs 2 and 3. After separating the pulmonary vessels and bronchus, en bloc resection of the superior sulcus tumor was completed. Thoracoscopic chest wall resection of the superior sulcus tumor can be an alternative to the Paulson posterolateral-paravertebral thoracotomy approach, which can cause severe postoperative pain and limited range of motion of the shoulder joint.

Laser-Trélat sign improved after the resection of a tiny ground-grass nodule: a case report.

The Laser-Trélat sign refers to eruptive seborrheic keratoses accompanied by internal malignancies, mainly abdominal advanced ones. Detailed associations remain unclear, and the skin lesions do not improve with the treatment of internal malignancies in half of the patients. Herein, we report a rare case of Laser-Trélat sign that improved after resection of a 0.6-cm pulmonary ground-glass nodule: adenocarcinoma in situ. The patient requested the resection with the hopes of improving the skin lesions, though immediate resection was not indicated oncologically. With informed consent, despite possible failure in improving cutaneous diseases, thoracoscopic partial resection of the right lower lobe was performed. Fortunately, her seborrheic keratoses substantially improved after the resection, without exacerbation. To our knowledge, this is the first report describing such a clinical course. It is essential to inform patients regarding the indication of treatment for internal malignancy and its limitation in improving eruptive seborrheic keratoses.

[The Outcome of Second Anatomical Pulmonary Resection for Ipsilateral Metachronous Lung Cancer].

INTRODUCTIONS: When the first intervention for lung cancer is anatomical resection, the ipsilateral repeat anatomical resection for metachronous second lung cancer becomes technically challenging. Herein, we report the outcomes of second anatomical pulmonary resection for ipsilateral metachronous lung cancer at our institution. SUBJECTS: Sixteen consecutive patients[ 10 men and 6 women, average age 70( range 59~81) years] were reviewed in this retrospective study. These patients underwent ipsilateral repeat anatomical resection for metachronous second lung cancer between 2009 and 2020. RESULTS: All case required right-sided lung resections. The previous interventions of patients included upper lobectomy, lower lobectomy, middle lobectomy, S2 segmentectomy, and S6 and S10a segmentectomy in 9, 4, 1, 1, and 1 case, respectively. The second surgical interventions were middle lobectomy, S6 segmentectomy, upper lobectomy, lower lobectomy, S1 segmentectomy, and S2 segmentectomy, in 6, 4, 2, 2, 1, and 1 case, respectively. Postoperative complications occurred in three patients. The median follow-up period was 53.5 months. Three patients died during the follow-up period. Of the 13 patients still alive, 6 had recurrence. The five-year overall survival rate was 80%. CONCLUSIONS: Although only a few cases were assessed, the prognosis after second anatomical pulmonary resection for ipsilateral metachronous lung cancer at our institution was satisfactory.

[Completion Pneumonectomy for the Recurrence of Lung Cancer].

INTRODUCTIONS: The morbidity and mortality after completion pneumonectomy (CP) are reportedly high. We, herein, report the outcomes of CP at our institution. SUBJECTS: Nine consecutive patients [7 men and 2 women, average age of 72 years(range 44~84 years)] who underwent CP for recurrence of lung cancer during 2012~2018 were retrospectively reviewed. RESULTS: Right-sided sleeve CP was performed in two cases and left-sided CP in seven cases. The indications for surgery were lymph node metastasis of the cancer, pulmonary metastasis, and bronchial stump recurrence in 4, 3, and 2 cases, respectively. Postoperative complications occurred in six patients. One of the patients who underwent right sleeve pneumonectomy developed bronchopleural fistula and died 68 days after the surgery. The mean follow-up period was 33 months, and four patients died during follow-up. Of the 5 patients still alive, 4 had no recurrence and 1 had recurrence in the stump of the main bronchus. The five-year overall survival rate was 78%. CONCLUSIONS: Although only few cases were assessed, the prognosis after CP at our institution was relatively good.

Intrapulmonary solitary fibrous tumour: a case report.

Solitary fibrous tumours (SFTs) mainly originate from the visceral pleura and may protrude to the thoracic cavity, but intrapulmonary SFTs are extremely rare. We describe a rare case of SFT arising in the right lung of an 83-year-old man who underwent surgical excision. Chest computed tomography (CT) revealed a 10-mm tumour in the lower lobe of the right lung. The size of tumour gradually increased and reached 17 mm 2 years after the first radiologic examination. Considering the possibility of malignancy, wedge resection of the right lower lobe was performed via video-assisted thoracic surgery. Microscopically, the tumour consisted mainly of spindle-shaped cells. Immunohistochemical staining indicated the tumour was positive for CD34, STAT6, vimentin and bcl-2, but negative for cytokeratins, D2-40 and S-100. Based on the histological findings, the tumour was diagnosed as SFT. The patient has been in good health for 6 months since the surgery.

Can the Japanese National Clinical Database risk calculator predict long-term survival of patients who undergo palliative segmentectomy for primary lung cancer?

OBJECTIVES: Selection criteria for palliative limited surgery in patients with non-small cell lung cancer (NSCLC) can vary by institution or surgeon. We retrospectively reviewed outcomes of poor-risk patients who underwent palliative segmentectomy (PS), using the National Clinical Database Risk Calculator (RC). METHODS: We retrospectively analyzed medical records of patients with NSCLC tumors ≥ 20 mm and consolidation/tumor ratios ≥ 0.5 on computed tomography, who underwent PS from January 2009 to March 2016. Median follow-up time was 47 months (range 2-102 months). RESULTS: We enrolled 67 patients (median age: 73.0 years), of whom 54 received thoracoscopic surgery and 28 received medial lymph-node dissection. The RC's mean predictive probability rate for perioperative mortality or severe complications was 7.1%. Of the 67 patients, 24 patients (43.0%) suffered post-surgical complications, including 2 (3%) who died in hospital; 17 eventually suffered NSCLC recurrences and/or metastases, 11 eventually died from NSCLC, and 17 died from other diseases. Five-year overall survival (OS) was 59.4%. When the patients were divided into high-risk (HR) and low-risk (LR) groups based on the RC, 5-year OS was significantly less in the HR group (43.9%) than in the LR group (82.2%; P < 0.05). CONCLUSION: The RC, which was developed primarily to determine perioperative risk, can predict long-term prognosis for compromised patients who undergo PS.

Left mediastinal node dissection after arterial ligament transection via video-assisted thoracoscopic surgery for potentially advanced stage I non-small cell lung cancer.

BACKGROUND: Left mediastinal node dissection during lung cancer surgery can be difficult because paratracheal and subcarinal lymph nodes are concealed by mediastinal structures. Arterial ligament transection (ALT) offers a wide surgical view of concealed mediastinal spaces, thus enabling extended en bloc lymph node dissection (LND). We analyzed surgical outcomes of patients who underwent extended LND after ALT via video-assisted thoracoscopic surgery (VATS) for potentially node-positive clinical stage I non-small cell lung cancer (NSCLC). METHODS: We retrospectively investigated the medical records of 75 patients who had undergone extended mediastinal node dissection after ALT via VATS for potentially node-positive NSCLC at our centers during the period from September 2008 through November 2015. Operative data and rates of overall survival (OS), in addition to mortality and morbidity, were analyzed in relation pathological stage and nodal stage. RESULTS: Operative time was 238±58 minutes, and an average of 32.7±12.9 hilar and mediastinal lymph nodes were dissected. Lymph node metastases were detected in 34 patients (6 pN1 patients, 27 pN2 patients, and 1 pN3 patient). Mediastinal lymph node metastases were detected around the carina (stations 2L, 4L, and 7) in 19 of 27 patients with pN2 cancer. Nineteen patients had a total of 24 postoperative complications. Recurrent nerve paralysis was the most frequent complication (n=11) but resolved in eight patients during follow-up. Survival rates at 3 and 5 years were 92.2%/88.4%, 100.0%/60.0%, and 87.7%/81.0% for p-stage I, II, and III, respectively, and 92.2%/88.4%, 100.0%/60.0%, and 87.4%/80.7% for pN0, pN1, and pN2, respectively. CONCLUSIONS: Extended mediastinal node dissection after ALT allowed detection of lymph node micrometastases in selected patients with potentially node-positive left NSCLC and may improve outcomes.

Pleuroperitoneal Communication and Ovarian Cancer Complicating Peritoneal Dialysis: A Case Report of a Patient with End-Stage Kidney Disease.

Peritoneal dialysis has been a widely accepted modality for treating end-stage kidney disease, but a regular dialysis schedule can be seriously disrupted by various comorbid conditions requiring surgical intervention. A 40-year-old woman who had been receiving peritoneal dialysis was sequentially but separately complicated by pleuroperitoneal communication and ovarian cancer. Despite the need for temporary interruption of her peritoneal dialysis schedule, it was successfully resumed after the relevant surgeries for each disease. Several concerns regarding overall postoperative dialytic management strategies, including how to deal with the peritoneal dialysis catheter during the postoperative period as well as how long peritoneal dialysis should be interrupted, which remain an unresolved issue in the field of nephrology, are also discussed.

Establishment of highly metastatic KRAS mutant lung cancer cell sublines in long-term three-dimensional low attachment cultures.

Decreased cell-substratum adhesion is crucially involved in metastasis. Previous studies demonstrated that lung cancer with floating cell clusters in histology is more likely to develop metastasis. In the present study, we investigated whether cancer cells in long-term, three-dimensional low attachment cultures acquire high metastatic potential; these cells were then used to examine the mechanisms underlying metastasis. Two KRAS-mutated adenocarcinoma cell lines (A549 and H441) were cultured and selected on ultra-low attachment culture dishes, and the resulting cells were defined as FL (for floating) sublines. Cancer cells were inoculated into NOD/SCID mice via an intracardiac injection, and metastasis was evaluated using luciferase-based imaging and histopathology. In vitro cell growth (in attachment or suspension cultures), migration, and invasion were assayed. A whole genomic analysis was performed to identify key molecular alterations in FL sublines. Upon detachment on low-binding dishes, parental cells initially formed rounded spheroids with limited growth activity. However, over time in cultures, cells gradually formed smaller spheroids that grew slowly, and, after 3-4 months, we obtained FL sublines that regained prominent growth potential in suspension cultures. On ordinary dishes, FL cells reattached and exhibited a more spindle-shaped morphology than parental cells. No marked differences were observed in cell growth with attachment, migration, or invasion between FL sublines and parental cell lines; however, FL cells exhibited markedly increased growth potential under suspended conditions in vitro and stronger metastatic abilities in vivo. A genomic analysis identified epithelial-mesenchymal transition (EMT) and c-Myc amplification in A549-FL and H441-FL cells, respectively, as candidate mechanisms for metastasis. The growth potential of FL cells was markedly inhibited by lentiviral ZEB1 knockdown in A549-FL cells and by the inhibition of c-Myc through lentiviral knockdown or the pharmacological inhibitor JQ1 in H441-FL cells. Long-term three-dimensional low attachment cultures may become a useful method for investigating the mechanisms underlying metastasis mediated by decreased cell-substratum adhesion.