Differences in muscle magnetic resonance imaging findings between anti-signal recognition particle antibody-positive myopathy and anti-aminoacyl-tRNA synthetase antibody-positive myositis.

OBJECTIVES: To compare the findings of muscle magnetic resonance imaging (MRI) between anti-signal recognition particle antibody-positive myopathy (anti-SRP myopathy) and anti-aminoacyl-tRNA synthetase antibody-positive myositis (anti-ARS myositis). METHODS: Of the patients newly diagnosed with polymyositis (PM)/dermatomyositis (DM) and immune-mediated necrotising myopathy (IMNM) admitted to our Department between April 2012 and December 2021, those who met the eligibility criteria of positive for anti-SRP or anti-ARS antibodies and thigh MRI at the time of diagnosis were included. We compared the lesion sites and MRI findings of the thigh muscles that were classified into oedema, fascial oedema, fatty replacement, and muscle atrophy between the three groups of anti-SRP myopathy, anti-Jo-1 antibody-positive myositis, and non-Jo-1 antibody-positive myositis. RESULTS: Of the 98 PM/DM and IMNM patients, five anti-SRP myopathy patients and 11 anti-Jo-1-positive and 22 non-Jo-1 antibody-positive patients with myositis were included. The SRP group showed significantly higher blood levels of myogenic enzymes such as serum creatinine kinase (CK) than the other groups (p=0.01). In thigh MRI findings, despite oedema in most cases in anti-SRP and anti-ARS groups, fascial oedema was identified only in the ARS group, frequently in Jo-1 positive patients in particular. Moreover, gluteus maximus muscle lesions occurred more frequently in the SRP group than in the ARS group (p=0.008). CONCLUSIONS: A comparison of thigh MRI between anti-SRP myopathy and anti-ARS myositis showed different findings and lesion sites reflecting the different pathophysiology that may contribute to their diagnosis.

Numerous multinucleated giant cells in cutaneous epithelioid angiosarcoma and pulmonary metastasis: A unique observation with potential diagnostic pitfalls.

The histopathologic diagnosis of poorly differentiated cutaneous angiosarcoma can be challenging. We report a case of cutaneous epithelioid angiosarcoma with numerous multinucleated giant cells (MGCs) developing pulmonary metastasis. A 79-year-old man presented with a red-purple plaque on the scalp. A skin biopsy revealed epithelioid cell proliferation, admixed with numerous MGCs, and background hemorrhage. Vascular spaces were focally present and lined by atypical endothelial cells, including MGCs. Immunohistochemically, tumor cells, including MGCs, were positive for CD31, D2-40, and ERG. The patient received radiation therapy and chemotherapy, after which a follow-up CT scan revealed symptomless pneumothorax and pulmonary metastases. The patient received palliative partial lung resection, and the specimen revealed histopathological and immunohistochemical features similar to the primary cutaneous lesion. Our report expands the morphologic spectrum of cutaneous epithelioid angiosarcoma. Cutaneous angiosarcoma is an aggressive neoplasm; thus, awareness of this rare manifestation is important.

Human granulocytic anaplasmosis with rash and rhabdomyolysis: A case report.

Human granulocytic anaplasmosis (HGA) is a tick-borne infection caused by Anaplasma phagocytophilum. Only seven cases of HGA have been reported in Japan to date. We report the case of a 61-year-old female farmer who developed HGA with rash and rhabdomyolysis. The patient had fever and erythema covering the entire body, including the palms. An induration with an eschar was observed on the right leg, indicating that the patient had been bitten by a tick. Elevated serum creatinine and creatinine kinase levels and hematuria indicated rhabdomyolysis. We suspected Japanese spotted fever, a tick-borne illness caused by Rickettsia Japonica, and administered minocycline and ciprofloxacin for a week. Transient neutropenia and thrombocytopenia were observed, but the symptoms improved. Polymerase chain reaction (PCR) and antibody tests for R. japonica and Orientia tsutsugamushi, which causes scrub typhus, were both negative. The PCR test for severe fever with thrombocytopenia syndrome virus was also negative. Antibodies against A. phagocytophilum-related proteins were detected by western blotting, indicating seroconversion of IgG with paired serum samples, and the patient was diagnosed with HGA. HGA should be suspected in acute febrile patients with a history of outdoor activity and cytopenia, with or without a rash. A testing system and the accumulation of cases in Japan are necessary for the early diagnosis and appropriate treatment of HGA.

Angiopoietin-like 4 Is a Critical Regulator of Fibroblasts during Pulmonary Fibrosis Development.

Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive, and irreversible interstitial pneumonia caused by the excessive production and deposition of extracellular matrix components, including type I collagen. Activated fibroblasts, called α-SMA (α-smooth muscle actin)-expressing myofibroblasts, are the major source of type I collagen in pulmonary fibrosis (PF), but the mechanisms underlying disease progression have not been fully elucidated. Here, we obtained lung fibroblasts from patients with IPF from both nonfibrotic and fibrotic areas as determined by a lung computed tomography scan and compared gene expression between these areas by DNA microarray. We found that ANGPTL4 (angiopoietin-like 4) was highly expressed only in fibroblasts from the fibrotic area. ANGPTL4 was selectively expressed in the fibroblastic area of IPF lungs, where the myofibroblast marker α-SMA was also expressed. ANGPTL4 also regulates the gene expression of fibrosis-related markers, cell migration, and proliferation. In addition, ANGPTL4 expression in a murine model of PF induced by treatment with bleomycin was significantly induced in the lungs from the acute to the chronic phase. Single-cell transcriptome analysis during the course of bleomycin-induced PF revealed that Angptl4 was predominantly expressed in the activated fibroblasts and myofibroblasts. Moreover, the administration of recombinant ANGPTL4 to the bleomycin-induced fibrosis model significantly increased collagen deposition and exacerbated the PF. In contrast, the pathogenesis of PF in Angptl4-deficient mice was improved. These results indicate that ANGPTL4 is critical for the progression of PF and might be an early diagnostic marker and therapeutic target for IPF.

Luteibacter jiangsuensis blood stream infection: a first case report.

BACKGROUND: Luteibacter jiangsuensis is a gram-negative aerobic bacillus that was first isolated from soil samples at a pesticide factory in China and reported in 2011. Here, we describe the first case of L. jiangsuensis infection in human. CASE PRESENTATION: A 59-year-old Japanese woman undergoing treatment for Crohn's disease was admitted to our hospital with fever. Clinical examination indicated catheter-related bloodstream infection. The catheter was removed and meropenem was initiated. Morphologically identical glucose non-fermentative gram-negative bacilli were detected from two sets of aerobic blood culture and catheter-tip cultures. MALDI-TOF mass spectrometry failed to identify the bacterium, which was later identified as L. jiangsuensis by 16 S rRNA gene sequencing. Antimicrobial susceptibility test revealed that the isolate was resistant to carbapenem, therefore meropenem was switched to intravenous levofloxacin (500 mg/day). After 14 days of treatment with levofloxacin, the patient was discharged. CONCLUSIONS: This is the first case of L. jiangsuensis infection in human. The strain was identified by 16 S rRNA gene sequence analysis.

Outcome of Resected Lung Cancers with Subcentimeter Solid Component on Computed Tomography.

BACKGROUND: Although the opportunity to treat subcentimeter lung cancers has increased, the optimal surgical methods remain unclear. We performed a retrospective study to examine the clinical outcome of subcentimeter lung cancers. PATIENTS AND METHODS: In total, 118 patients who underwent curative resection for subcentimeter lung cancer from January 2005 to December 2013 were analyzed. Multivariate Cox proportional hazards models were used to calculate the hazard ratio to identify independent predictors of recurrence-free survival (RFS) and overall survival (OS). RESULTS: Anatomical resections were performed for 64 patients (59 lobectomies and 5 segmentectomies) and wedge resections for 54 patients. Recurrence developed in six patients who had consolidation-predominant tumors (consolidation/tumor [C/T] ratio of >0.5) and underwent wedge resections. The first recurrence patterns were regional recurrences in three patients, both regional and distant in one, and distant in two. Seventeen patients died of other causes. The multivariate analysis revealed that the C/T ratio was the independent predictor of RFS (p = 0.008) and OS (p = 0.011). CONCLUSION: Patients with subcentimeter lung cancer rarely developed recurrence. The C/T ratio was the independent prognostic factor, and all relapsed patients received wedge resections. Even for subcentimeter lung cancers, we should select the extent of pulmonary resection after thoroughly considering whether wedge resection (less invasiveness) is a reasonable alternative to anatomical resection (superior oncologic efficacy) considering the C/T ratio of the lesion.

High incidence of serious infections requiring hospitalisation in human T-cell leukaemia virus type 1-positive rheumatoid arthritis: A case-controlled observational study.

OBJECTIVES: We aimed to assess the clinical features of human T-cell leukaemia virus type 1 (HTLV-1)-positive rheumatoid arthritis (RA) patients. Furthermore, we investigated the impact of HTLV-1 infection on incidences of serious infections requiring hospitalisation (SIH) and malignancies. METHODS: A total of 150 sex- and age-matched HTLV-1-negative and 50 HTLV-1-positive RA patients were enrolled from the HTLV-1 RA Miyazaki Cohort Study. Clinical and laboratory data were collected from this cohort database. The incidence rate (IR) for SIH and malignancies from 2015 to 2020 was analysed. RESULTS: The median age and female ratio in the study population were 70 years old and 80%, respectively. Although no differences were found in inflammatory marker values between the two groups, the patient global assessment and Health Assessment Questionnaire scores were higher in HTLV-1-positive RA patients. In HTLV-1-negative RA patients, the IR for SIH was 6.37/100 person-years (PY) and 1.32/100 PY for malignancies. In HTLV-1-positive RA patients, SIH occurred in 11.1/100 PY and malignancies in 2.46/100 PY. The crude IR ratio comparing SIH between two groups was 1.74 (95% confidence interval, 1.04-2.84), which was a significant increase. CONCLUSIONS: HTLV-1-positive RA patients may worsen RA symptoms. HTLV-1 may be a risk factor for SIH.

Surgical treatment for secondary spontaneous pneumothorax: a risk factor analysis.

PURPOSE: While surgery is an effective treatment for secondary spontaneous pneumothorax (SSP), it can be difficult, because affected patients are usually in a poor general condition. The present study investigated the risk factors of postoperative complications after surgery for SSP. METHODS: Eighty-eight patients with SSP who underwent surgery from January 2006 to March 2018 were investigated. Clinical data were reviewed, and a multivariate analysis was performed. RESULTS: Eighty-four patients (95%) were males, and the median patient age was 72 years. Underlying lung diseases were chronic obstructive pulmonary disease in 58 patients (65.9%), interstitial pneumonia in 26 (29.5%), and others in 4 (4.5%). Postoperative complications developed in 21 patients (24%). Hospital mortality/prolonged length of stay occurred in 6 patients (7%). A multivariate analysis showed that the preoperative performance status (performance status 0-2 vs. 3, hazard ratio: 6.570, 95% confidence interval: 1.980-21.800) was an independent predictor of postoperative complications. CONCLUSION: Surgery for SSP contributed to early chest tube removal and favorable outcomes. However, rare fatal events occurred, and the patient performance status was a risk factor for postoperative complications. A careful evaluation of each patient's performance status is needed to determine the need for surgical intervention for SSP.

[Effectiveness of Osimertinib for Postoperative Recurrence of Lung Cancer with L861Q Activating EGFR Mutation:Report of a Case].

A 69-year-old woman was referred to our hospital because of an abnormal shadow on a chest roentgenogram at a medical check-up. Chest computed tomography showed a 2.5 cm-diameter tumor in the right pulmonary lower lobe. Fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) could not detect the other lesions. The patient underwent thoracoscopic right lower lobe lobectomy for lung adenocarcinoma. Pathological diagnosis was invasive adenocarcinoma (pT1cN0M0). EGFR status was positive for the L861Q mutation in exon 21. At 31 months after surgery, the recurrence appeared as vertebral and multiple pulmonary lesions, and the treatment with osimertinib showed satisfactory response seven months after starting the treatment.

Case of endobronchial metastasis from breast cancer accompanied with Cunninghamella bertholletiae tracheobronchial mycetoma.

Cunninghamella is a member of the class Zygomycetes. Cunninghamella species include ubiquitous filamentous fungi; infections caused by Cunninghamella species are less frequent but have higher mortality rates than infections caused by Mucorales group members such as Rhizopus and Mucor. Herein, we reported a rare fatal case of endobronchial metastasis from breast cancer accompanied with Cunninghamella bertholletiae tracheobronchial mycetoma. A 73-year-old female with a history of right-sided breast cancer who had undergone mastectomy 11 years previously and had no recurrence presented to our emergency department with a 1-week history of left-sided back pain. Chest X-ray revealed left lung atelectasis; bronchoscopy revealed an endobronchial mass lesion in the left main bronchus. Pathological examination revealed fungal mycetoma but malignant lesions were not detected. Endobronchial and lung mycetoma caused by Cunninghamella bertholletiae were initially diagnosed; liposomal amphotericin B was administered, but her condition deteriorated. Rigid endoscopy showed growth of hemorrhagic tissue occupying the left main bronchus just under the carina. Pathological examination of the shaved lesion revealed metastasis from breast cancer covered with abundant necrotic tissue. No mold was observed in the necrotic tissue; this was probably due to liposomal amphotericin B treatment. To our knowledge, this is the first case of endobronchial metastasis from breast cancer accompanied with Cunninghamella bertholletiae mycetoma. Distinguishing endobronchial metastases from breast cancer and atypical presentations of Cunninghamella endobronchial mycetomas can be very difficult. Repeated bronchoscopies maybe helpful in establishing an accurate diagnosis when clinical prognosis does not match the initial diagnosis.

Prognostic impact of underlying lung disease in pulmonary wedge resection for lung cancer.

BACKGROUND: Pulmonary wedge resection is an option for lung cancer patients with limited cardiopulmonary preservation. As the impact of underlying lung status on the prognosis of such patients remains unclear, we assessed this issue. METHODS: A total of 149 borderline surgical candidates with localized lung cancer who had undergone wedge resection were retrospectively investigated. Clinical variables related to perioperative morbidity, local control rate, and oncological outcomes based on underlying lung disease were analyzed. RESULTS: According to the risk analysis of postoperative complications, underlying lung disease did not influence the surgical morbidity. Postoperative recurrence occurred in 65 patients (locoregional recurrence in 36, distant metastasis in 12, and both simultaneously in 17). Multivariate analysis revealed that emphysema on computed tomography (CT) [hazard ratio (HR) 0.45; 95% confidence interval (CI) 0.21-0.99] was an independent indicator of locoregional recurrence. Forty-four patients died of lung cancer and 29 of other causes. Multivariate analysis demonstrated that interstitial lung disease on CT (HR 1.98; 95% CI 1.01-3.89) was a predictor of poor prognosis. CONCLUSION: Pulmonary wedge resection can be safely undergone by lung cancer patients regardless of pulmonary comorbidity, although underlying lung disease may influence the prognosis after wedge resection.

Near-infrared spectroscopy monitoring during out-of-hospital cardiac arrest: can the initial cerebral tissue oxygenation index predict ROSC?

STUDY OBJECTIVES: Near-infrared spectroscopy is a modality that can monitor tissue oxygenation index (TOI) and has potential to evaluate return of spontaneous circulation (ROSC) during cardiopulmonary resuscitation (CPR). This study's objectives were to evaluate whether TOI could be associated with ROSC and used to help guide the decision to either terminate CPR or proceed to extracorporeal CPR (ECPR). METHODS: In this observational study, we assessed the patients with out-of-hospital cardiac arrest with non-traumatic cause receiving CPR on arrival at our ED between 2013 and 2016. TOI monitoring was discontinued either on CPR termination after ROSC was reached or on patient death. Patients were classified into two groups: ROSC and non-ROSC group. RESULTS: Out of 141 patients, 24 were excluded and the remaining 117 were classified as follows: ROSC group (n=44) and non-ROSC group (n=73). ROSC group was significantly younger and more likely to have their event witnessed and bystander CPR. ROSC group showed a higher initial TOI than non-ROSC group (60.5%±17.0% vs 37.9%±13.7%: p<0.01). Area under the curve analysis was more accurate with the initial TOI than without it for predicting ROSC (0.88, 95% CI 0.82 to 0.95 vs 0.79, 95% CI 0.70 to 0.87: p<0.01). TOI cut-off value ≥59% appeared to favour survival to hospital discharge whereas TOI ≤24% was associated with non-ROSC. CONCLUSIONS: This study demonstrated an association between higher initial TOI and ROSC. Initial TOI could increase the accuracy of ROSC prognosis and may be a clinical factor in the decision to terminate CPR and select patients who are to proceed to ECPR.

The time-sequential changes of risk factors for adult T-cell leukemia development in human T-cell leukemia virus-positive patients with rheumatoid arthritis: a retrospective cohort study.

Objective: This study aimed to investigate the time-sequential changes of risk factors for adult T-cell leukemia (ATL) development in human T-cell leukemia virus type 1 (HTLV-1)-positive rheumatoid arthritis (RA) patients. Methods: HTLV-1 infection was screened using particle agglutination assay and confirmed via western blotting in 365 RA patients. Twenty-three HTLV-1-positive RA patients were included in the study cohort. Blood samples were obtained from these patients at each observation time point. The values of HTLV-1 proviral load (PVL) and serum soluble IL-2 receptor (sIL2-R), which are risk factors for ATL development, were measured using real-time PCR and enzyme immunoassay, respectively. Results: The study cohort comprised 79 person-years. The median HTLV-1 PVL and sIL2-R values of the HTLV-1-positive RA patients were 0.44 copies per 100 white blood cells (WBCs) and 406 U/mL, respectively. Three HTLV-1-positive RA patients showed a high PVL value. No remarkable changes were observed in the PVL and sIL2-R values during the observation period. However, one elderly HTLV-1-positive RA patient who had a high PVL value developed ATL during treatment with methotrexate and infliximab. Conclusion: A thorough clinical assessment of the risk factors for ATL development may be necessary in daily clinical practice for RA patients in HTLV-1-endemic areas in Japan.

[Preoperative Detection of Pleural Adhesions Using Transthoracic Ultrasonography].

Recently, there has been an increase in the experience of lung surgery in cases with a history of thoracotomy or pneumonia. In these cases, pleural adhesion is often seen and makes the surgery to be difficult. Especially in thoracoscopic surgery, lung damage must be care at the 1st port insertion. In this report, the usefulness of the extent of pleural adhesion to the chest wall before surgery by using a transthoracic ultrasonography was assessed. Between April 2017 and September 2018, 32 patients underwent preoperative ultrasound examination, and 128 ports were evaluated whether had adhesions or not using lung sliding sign. All patients of 128, 24 adhesions were found at surgery, resulting in 14 true positive, 10 false negative, 0 false positive, and 104 true negative findings [sensitivity:58.3% (14/24), specificity: 100.0% (104/104), accuracy:92.2% (118/128)]. Especially, about the 1st port, accuracy was 93.8 % (30/32). In Conclusion, preoperative transthoracic ultrasonography could provide useful information on the pleural adhesion leading safe initial thoracoscopic access without lung injury.

Validating margin status in lung wedge resection for clinical stage I non-small cell lung cancer.

Stage I non-small cell lung cancer (NSCLC) is a localized disease without metastasis; therefore, it can be treated effectively with local therapies. Pulmonary resection is the most frequent treatment, performed as pulmonary wedge resection, segmentectomy, lobectomy, or pneumonectomy. Some retrospective clinical studies of pulmonary wedge resection suggest that its outcome may be inferior to that of anatomical pulmonary resection, whereas other recent studies, which assess surgical margin status, leveled acceptable outcomes. Since the outcome of pulmonary wedge resection for lung cancer may depend on tumor size, distance from the surgical margin to the tumor, tumor size/margin distance ratio, and margin cytology results, a prospective study assessing these parameters is ongoing. This will allow us to identify the clinical implications of these factors and predict which patients are likely to have a good outcome.

[Prognostic Significance of Mode of Nodal Involvement in Pulmonary pN1 Squamous Cell Carcinoma].

According to the tumor, node, metastasis (TNM) classification of the Union for International Cancer Control (UICC) and the International Association for the Study of Lung Cancer (IASLC), N factor is defined by the anatomic extent of the metastatic lymph nodes, but is not related to the metastatic pattern. N1 is defined as "metastasis in ipsilateral peribronchial and/or ipsilateral hilar lymph nodes and intrapulmonary nodes, including involvement by direct extension". Lymph node involvement is one of the most important prognosistic factors in non-small cell lung cancer patients. Squamous cell carcinoma (SCC) arises in the central airway and directly invades adjacent lymph nodes more frequently compared to the other histologic types. We retrospectively evaluated the prognostic impact of lymph node involvement patterns in pulmonary pN1 squamous cell carcinoma (SCC) patients. The clinical records of 23 patients with pN1 SCC who underwent complete resection and systematic lymph node dissection at our institute were retrospectively reviewed. We classified the patient into 2 N1 groups based on the nodal involvement pattern:metastatic N1 nodes involved directly by the main tumor (direct group) and metastatic N1 nodes not directly involved by the main tumor (separate group). The direct group consisted of 10 patients, and the separate group comprised 13 patients. There were no significant difference in the gender, tumor size, surgical procedure, and number of metastatic lymph nodes. Overall survival and disease-free survival curves were plotted using the Kaplan-Meier method, and the statistical differences between both groups was determined by the log-rank test. P values <0.05 were considered statistically significant. The direct group had a much better 5-year overall survival rate of 100.0% compared with 55.9% for the separate group (p=0.037). The N factors in TNM classification are defined only by anatomical location. However, our results suggest that the mode of nodal involvement in pulmonary pN1 SCC might be a prognostic factor. Accordingly, it is likely that biological behaviors are different between direct metastasis and separate metastasis. Since there are some limitations in this study:its retrospective design and small sample size, the clinical implication of direct extension to N1 lymph nodes needs to be confirmed by a large scale prospective study in the future.

[A Case of Multiple Venous Thromboses Associated with Acute Cytomegalovirus Infection].

A previously healthy 44-year-old male presented with fever, abdominal pain, liver dysfunction and lymphadenopathy. He was diagnosed as having acute cytomegalovirus (CMV) infection with elevated CMV-IgG and IgM, and observed with supportive therapy. He was admitted to our hospital with prolonged fever lasting for a month. Enhanced CT revealed multiple thromboses in the right pulmonary artery and superior mesenteric vein. Follow-up CT after one week revealed new-onset thromboses in the left pulmonary artery and common iliac vein. Screening tests for thrombophilia were negative. His symptoms were improved with anticoagulant therapy with intravenous heparin, followed by oral warfarin. He was discharged on admission day 28 with good condition. Follow-up CT after 6 months revealed complete resolution of the thromboses. Anticoagulant therapy was stopped after 9 months, and he has been well without recurrence. Though vascular thrombosis is a rare complication, we must be alert to the signs and symptoms of thrombosis in patients with acute CMV infection.

Evaluation of nursing interventions using minimally invasive assessments methods for patients in a persistent vegetative state.

AIM: This study aimed to evaluate the effects of nursing interventions using minimally invasive or non-invasive methods conducive to frequent use in order to assess patients in a persistent vegetative state (PVS). METHODS: We provided three nursing interventions-sitting the patient in an upright position, footbath care, and oral care-to PVS patients (n = 11) and elderly bedridden subjects with consciousness (n = 6) for 3 weeks in addition to ordinary nursing treatments. The Kohnan Score, plasma cortisol and adrenaline levels, General Well-Being Schedule score, and facial expression assessments were used as evaluation methods. RESULTS: The Kohnan Score of PVS patients declined significantly, indicating that the interventions increased patients' consciousness levels, but none of the other parameters showed significant change in either group. The change in Kohnan Score showed dependent trends for facial expression at baseline, cortisol change during the intervention, and the term of PVS. CONCLUSIONS: The data suggest three indices for predicting intervention efficacy in individuals and for assessing an intervention's contribution to quality of life improvement. Among the multiple evaluation methods, Konan Scores was the most effective. Ultimately, the three nursing interventions used in this study and Konan Score led to the optimization of nursing home care and rehabilitation for PVS patients.

[Resection of a Posterior Mediastinal Tumor Using Intraoperative Motor Evoked Potential Monitoring;Report of a Case].

A 20-year-old man with a posterior mediastinal tumor incidentally found on a chest X-ray was referred to our hospital. Chest computed tomography showed a 3 cm nodule located on the left side of the 10-11th thoracic vertebra, where the artery of Adamkiewicz is presumed to arise. He underwent left thoracotomy to remove the lesion. The tumor was safely resected with the assistance of intraoperative motor evoked potential(MEP) monitoring. The postoperative diagnosis was a benign schwannoma. In thoracic surgery for posterior mediastinal tumors, intraoperative MEP monitoring is useful for preventing paraplegia.

[Primary Pulmonary Synovial Sarcoma Confirmed by Demonstration of SYT-SSX Fusion Gene Translocation by Fluorescence In Situ Hybridization].

A 58-year-old man was referred to our hospital due to a mass shadow noted on a chest X-ray. Chest computed tomography showed a 3 cm nodule in the left lung. Thoracoscopic left upper lobectomy was performed to remove the lesion, and the postoperative diagnosis was primary pulmonary synovial sarcoma according to the histology and SYT-SSX gene analysis.