[Thyroid Transcription Factor-1 is Useful for Identifying Primary Tumors].

A 67-year-old man had underwent liver resection 3 years previously. The pathological diagnosis was intrahepatic cholangiocarcinoma. However, a follow-up computed tomography(CT) scan revealed gradual enlargement of the pulmonary nodule left S1+2 and he was performed surgery. Because the metastasis of intrahepatic cholangiocarcinoma was demonstrated for lymph node (LN) #3 by intraoperative rapid pathology, only the left upper lobe was resected. Finally, the postoperative pathological diagnosis by thyroid transcription factor-1 (TTF-1) staining was primary lung cancer. Liver lesion was also diagnosed as liver metastases of the lung cancer by TTF-1 staining.

[Thoracoscopic diaphragmatic plication for eventration of diaphragm in children using no-knife automatic suturing device].

UNLABELLED: Diaphragm eventration could inhibit the lung development due to compression. Thus diaphragm plication is required for the diaphragm eventration to prevent lung compression causing lung immaturity. However, we sometimes encounter the difficulty in endoscopic plication for fragile diaphragm without damaging it in narrow thoracic space in children. We demonstrate the plication using no-knife automatic suturing device. METHOD: Two linear ridges are made using stapler on the flaccid diaphragm without cutting the tissue. Then the created 2 ridges are sutured so that the diaphragm is plicated. BENEFITS: Once the stapler was applied to make 2 linear ridges, we easily sutured and gathered them without checking the damage of the intra-abdominal organs. Furthermore, reinforced ridges could be plicated without damaging the fragile diaphragm. We conclude that above described method is preferable for the diaphragm eventration in pediatric patients with fragile diaphragm and limited thoracic space.

Efficacy of measuring the invasive diameter of lung adenocarcinoma using mediastinal window settings: A retrospective study.

The recently published 8th edition of the tumor node and metastasis Classification of Lung Cancer proposes using the maximum dimension of the solid component of a ground glass nodule (GGN) for the T categorization. However, few studies have investigated the collection of this information when using mediastinal window settings. In this study, we evaluated tumor measurement data obtained from computed tomography (CT) scans when using mediastinal window settings.This study included 202 selected patients with persistent, partly solid GGNs detected on thin-slice CT after surgical treatment between 2004 and 2013. We compared the differences in tumor diameters measured by 2 different radiologists using a repeated-measures analysis of variance. We divided the patients into 2 groups based on the clinical T stage (T1a+T1b vs T1c) and estimated the probability of overall survival (OS) and disease-free survival (DFS) using Kaplan-Meier curves.The study included 94 male and 108 female patients. The inter-reviewer differences between tumor diameters were significantly smaller when the consolidation to maximum tumor diameter ratio was ≤0.5. The 2 clinical groups classified by clinical T stage differed significantly with respect to DFS when using the mediastinal window settings. However, no significant differences in OS or DFS were observed when using the lung window setting.Our study yielded 2 major findings. First, the diameters of GGNs could be measured more accurately using the mediastinal window setting. Second, measurements obtained using the mediastinal window setting more clearly depicted the effect of clinical T stage on DFS.

Detecting tumor-infiltrating Forkhead box P3-positive T cells in the prognosis of lung adenocarcinoma: Possible role of clustering tumor interleukin-12 subunit alpha and transforming growth factor beta 1 expression.

BACKGROUND: While regulatory T cells (Tregs) are a poor prognostic factor for lung cancer, they may be detected as Forkhead box P3+ (FOXP3+) and cluster of differentiation (-CD) 4+ T cells by classifying FOXP3+CD4+ T cells into different subpopulations of CD4 cells. OBJECTIVES: To classify clusters of tumor-infiltrating Tregs in lung adenocarcinoma based on the mRNA expression levels of interleukin-12 subunit alpha (IL12A) and transforming growth factor beta 1 (TGFB1) in tumor specimens. MATERIAL AND METHODS: Seventy-nine patients with lung adenocarcinoma were evaluated in this study. Clinical data were obtained from the patients' medical records, while tumor tissue samples were preserved as formalin-fixed paraffin-embedded (FFPE) tissue specimens. Immunohistochemical staining for CD4, CD8 and FOXP3 was performed and stained cell counts were obtained under 5 high-power fields. cDNA was synthesized from total RNA extracted from FFPE tissue specimens and amplified with Taqman probes for FOXP3, IL12A, TGFB1, and the glyceraldehyde-3-phosphate dehydrogenase gene. RESULTS: Two clusters were identified: IL12AlowTGFB1low (Cluster 1: n = 44) and IL12AhighTGFB1high (Cluster 2: n = 39). Although no significant difference in the FOXP3+ cell/CD4+ cell ratio was observed between the 2 clusters (p = 0.921), the high FOXP3+/CD4+ cell ratio group showed a significantly poorer relapse-free survival rate than the low FOXP3+/CD4+ cell ratio group in Cluster 1 (p = 0.031). CONCLUSIONS: Although the results revealed no direct association between Tregs and prognosis according to each subtype, these results suggest that if a lung cancer specimen contains low levels of IL12A and TGFB1, the FOXP3+/CD4+ cell ratio is useful for predicting the prognosis of lung cancer.

Spontaneous regression of a carcinoid tumor that required resection owing to its reappearance and subsequent enlargement after 2 years: a case report.

We present a rare case of spontaneous regression in a typical lung carcinoid. A 20-year-old woman with an abnormal shadow on a chest radiograph was admitted to our hospital. Computed tomography revealed a smooth nodule in the left S1 + 2 segment. At the 6-month follow-up, the nodule had regressed without treatment. At the 2-year follow-up, the tumor reappeared in the same place as before. We performed left upper lobectomy via 4-port thoracoscopic surgery. A pathological examination revealed a typical carcinoid. Lung carcinoids can spontaneously regress; long-term follow-up is important for timely detection of tumor reappearance.

Mesothelial cyst derived from chest wall pleura growing after thoracic surgery: a case report.

BACKGROUND: Intrathoracic mesothelial cysts almost always arise in the mediastinum, and extramediastinal mesothelial cysts are extremely rare. Here we describe a case of mesothelial cyst derived from the chest wall pleura growing after thoracic surgery. CASE PRESENTATION: A 63-year-old Japanese woman was referred to our department. She had undergone total hysterectomy for cervical carcinoma and two lung wedge resections for metastatic lung cancer on the upper and lower lobes of her right lung and lower lobe of her left lung. After the thoracic surgery, an intrathoracic chest wall mass was found, which grew gradually. Computed tomography demonstrated a 2.0 × 1.8 cm low-density mass without contrast effect. Magnetic resonance imaging demonstrated a low-intensity mass in T1-weighted imaging and a high-intensity mass in T2-weighted imaging. Thoracoscopic excision of the mass was performed. The cystic mass was thought to be derived from her chest wall and was pathologically diagnosed as mesothelial cyst. Five years after the surgery, she has no evidence of recurrence of the cyst or cervical carcinoma. CONCLUSIONS: The genesis of extramediastinal mesothelial cysts may be related to inflammation. From this perspective, extramediastinal mesothelial cysts may have different characteristics from pericardial cysts and resemble peritoneal inclusion cysts. Although, extramediastinal mesothelial cysts are not established, their characteristics resemble peritoneal inclusion cysts; therefore, such interesting intrathoracic cysts should be carefully resected considering the risk.

Ciliated muconodular papillary tumor of the lung presenting with polymyalgia rheumatica-like symptoms: a case report.

Ciliated muconodular papillary tumors (CMPTs) of the lung have been recently characterized as low-grade malignant tumors and may be indistinguishable from adenocarcinoma in situ (AIS) because they are both abundant in mucous and spread along the alveolar walls. Herein, we report a case of CMPT with polymyalgia rheumatica (PMR)-like symptoms, which resolved after resection. After the surgery, antinuclear antibody tests were performed, but no abnormalities were noted. Furthermore, the lung tumor could not be distinguished from AIS, as revealed by a pathological examination. This case demonstrates two key points: the paraneoplastic symptoms of CMPT can indicate PMR, and it is difficult to diagnose peripheral lung tumors as CMPT unless there is a completely resected specimen available. The possibility exists that an increased number of older patients will be diagnosed with CMPT because of the increasing frequency of computed tomography performed in this population. Therefore, it is important for clinicians to obtain completely resected specimens to ensure accurate diagnosis and management of CMPT.

Mediastinal mature teratoma perforating the right lung that was successfully resected with complete thoracoscopic surgery: A case report.

INTRODUCTION: A perforating mediastinal mature teratoma can cause severe inflammation and adhesion; therefore, open surgery is usually performed. Asymptomatic perforation involving a teratoma is very rare. Complete thoracoscopic surgery is often difficult because of inflammation associated with perforation and the frequently large size of a mediastinal mature teratoma. We report a rare case of an asymptomatic perforating mediastinal mature teratoma successfully treated with complete thoracoscopic surgery. PRESENTATION OF CASE: The patient was a 15-year-old girl with an abnormal shadow at the mediastinum seen on chest radiography at a health examination performed at her junior high school; an asymptomatic mediastinal tumour was suspected. Enhanced computed tomography revealed a 6.5 × 3.5-cm tumour associated with the right upper lobe. Thoracoscopic surgery was performed using 4 access ports. Although there were inflammatory changes, hemi-thymectomy and right upper lobectomy were achieved with complete thoracoscopic surgery. The tumour included the skin, sebaceous glands, hair, and pancreatic tissue and was diagnosed as a mature teratoma perforating the right upper lobe. DISCUSSION: There might be limited inflammatory changes if the patient has few or no symptoms, as in our case. In such cases, the tumour may be excised even if it is large. CONCLUSION: We report a rare case of an asymptomatic perforating mediastinal mature teratoma that was successfully treated with complete thoracoscopic surgery. Although infection, inflammatory adhesion, large tumour size, and the need for radical cure are concerns, complete thoracoscopic surgery might be helpful. In cases of few or no symptoms, thoracoscopic surgery is worth challenging.

Intractable pneumothorax complicated with interstitial pneumonitis treated with the Tachosuture technique: A case report.

It has been proven that the Tachosuture technique is effective for preventing prolonged air leaks caused by pulmonary resection. We successfully used the Tachosuture technique to treat intractable pneumothorax with interstitial pneumonia. This technique avoids pulmonary resection and contributes to acute exacerbations of interstitial pneumonia.

Video-assisted thoracoscopic surgery can help enable the complete resection of a mediastinal tumor caused by immunoglobulin G4-related disease and avoid the need for postoperative medication: A case report.

Immunoglobulin (Ig) G4-related disease has various clinical signs and symptoms, and steroidal therapy with corticosteroids has been found to be effective for treatment. Few cases of IgG4-related disease associated with paravertebral tumor have been reported, and there have been no reports on complete resection of such a tumor. Here, we report a case of IgG4-related disease associated with a paravertebral tumor that was successfully resected without the need for postoperative medication. An 84-year-old woman was admitted to our hospital with a paravertebral tumor. She underwent thoracoscopic surgery, and pathological examination of the tumor specimen revealed that the tumor resulted from IgG4-related disease. After resection, there was no need for postoperative medication. Our case indicates the rare possibility of a paravertebral tumor associated with IgG4-related disease and the potential for complete resection as a treatment for such a tumor.

Remitting seronegative symmetrical synovitis with pitting edema syndrome complicated with primary lung cancer.

Remitting seronegative symmetrical synovitis with pitting edema syndrome has been reported to be associated with malignant tumors. However, few cases occurring with lung cancer have been reported. We here report a case of remitting seronegative symmetrical synovitis with pitting edema syndrome complicated with lung cancer. A 77-year-old man presented with poly arthritis (both shoulders, knees, and hands), swelling of the hands, and an elevated C-reactive protein level. As the patient's rheumatoid factor was negative, he was diagnosed with remitting seronegative symmetrical synovitis with pitting edema syndrome. At the same time, computed tomography revealed a nodule suspicious of lung carcinoma in the right lower lobe. Right lower lobe lobectomy was performed, and the nodule was diagnosed as adenocarcinoma. Pathologically, pleural invasion and visceral pleural dissemination were detected, and the tumor was diagnosed as a primary lung carcinoma, p-T2aN0M1a, stage IV. During the preoperative interval, the remitting seronegative symmetrical synovitis with pitting edema syndrome had been successfully treated with prednisolone 20 mg/day, which was later reduced to 6 mg/day. Eighteen months after surgery, the patient's carcinoembryonic antigen levels increased, and the same symptoms recurred, this time more severely. We performed cranial magnetic resonance imaging and whole body positron emission tomography, but we did not detect any cancer recurrence. To treat the recurred remitting seronegative symmetrical synovitis with pitting edema syndrome, the patient has required not only prednisolone, but also azathioprine; however, the symptoms have not been controlled effectively. In our case, matrix metalloproteinase-3 levels were elevated, as shown in the tumor cells by immunohistochemistry. If higher matrix metalloproteinase-3 levels cause the symptoms, in our case, then remitting seronegative symmetrical synovitis syndrome might be considered a paraneoplastic syndrome. However, we could not conclusively determine if the subsequent reduction in matrix metalloproteinase-3 levels was the result of the surgery or the prednisolone treatment. Furthermore, based on the patient's progress following surgery, it is still not clear if the remitting seronegative symmetrical synovitis with pitting edema syndrome complicated with primary lung cancer in this case may be a paraneoplastic syndrome.

Successful thoracoscopic removal of a giant teratoma following extraction of cystic conponents: a case report.

Video-assisted thoracoscopic surgery is a type of minimal-access surgery. The nature of the surgery means that there are limitations on the size of a tumor that can be removed through an access incision. Herein, we report our experience removing a giant teratoma (16 × 14 × 13 cm in size) from the anterior mediastinum of a young girl. We employed video-assisted thoracoscopic surgery to remove the teratoma through a mini-thoracotomy following the extraction of the cystic components.