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PubMed1989

Low glucose and pH levels in malignant pleural effusions. Diagnostic significance and prognostic value in respect to pleurodesis.

In order to determine the diagnostic and prognostic significance of low pleural glucose and pH levels, we executed a prospective study of these parameters and cytologic yield in 77 cases of malignant pleural effusions diagnosed from 116 consecutive thoracoscopies. The extension of the neoplasms detected by thoracoscopy as well as the results of our attempts to carry out pleurodesis by talc were also studied. Pleural glucose levels were less than 60 mg/dl in 16 cases, and the cytologic yield was positive in 14 of these cases (87%). The glucose value rose above this level in 61 cases, and the cytology was positive in 30 cases (49%; p less than 0.006). A pH less than 7.30 was encountered in 18 cases and there were positive cytologic findings in 14 of these cases (78%). The pH was above 7.30 in 46 cases, and cytologic studies were positive in 22 cases (48%; p less than 0.03). There were ten cases in which both the glucose and pH levels were low, and the cytology was positive in 9 cases (90%), while there were 40 cases in which both the glucose and pH levels were high and cytologic yields of 20 of these cases were positive (50%; p less than 0.03). The extension of the lesions observed during thoracoscopy showed important differences as far as this related to the glucose levels (p less than 0.005), but this relationship as it concerned pH levels was even more significant (p less than 0.0002). The differences were also highly significant (p less than 0.003) when the glucose and pH were jointly considered.(ABSTRACT TRUNCATED AT 250 WORDS)

Body Fluids↗
PubMed1995

Failure of talc pleurodesis is associated with increased pleural fibrinolysis.

Diffuse pleural inflammation and fibrin deposition following the instillation of the sclerosing agent is considered necessary for a successful pleural symphysis. We hypothesized that an impairment in fibrin formation or an increased endopleural fibrinolysis would lead to failure of pleurodesis. To investigate changes in the pleural coagulation/fibrinolysis balance, we studied 75 consecutive patients who underwent thoracoscopy. Fifty-four of these patients with malignant pleural effusions and four with a benign recurrent effusion underwent thoracoscopic talc pleurodesis. Another four patients with malignancy and 13 with benign effusions had no talc poudrage performed and were included as a control group. Serial determinations of thrombin-antithrombin III complex (TAT), plasminogen activator inhibitor (PAI), and D-dimer were made in pleural fluid samples taken at the beginning of thoracoscopy (baseline), immediately after thoracoscopic biopsies had been done (postbiopsy), 3 h after thoracoscopy--either with talc poudrage or without--and 24 and 48 h after the procedure, as well as in cases of recurrence of effusions (farline). Successful pleurodesis was obtained in 42 of 52 patients who could be evaluated (81%), and failure was seen in 10. Strong activation of coagulation and production of PAI was observed in all groups, including the control (no talc) group. Fibrinolytic activity (as expressed by D-dimer levels) showed a clear decline 24 h after talc poudrage in patients with a good outcome of pleurodesis, as oppossed to those with bad results and to the control group, and returned to the baseline by 15 d. We conclude that increased pleural fibrinolytic activity is associated with failure of pleurodesis, despite significant inhibitory activity of PAI in all groups.

Antithrombin III↗
PubMed2005

Thoracoscopically guided transaxillary resection of adjoining intercostal plexiform neurofibromas: review of mosaicism in neurofibromatosis: technical note.

OBJECTIVE AND IMPORTANCE: The present article describes a rare presentation of Type I neurofibromatosis (NFI) involving adjoining intercostal plexiform neurofibromas, as well as the novel use of thoracoscopy to guide surgical resection. This presentation highlights the manner in which NFI may affect selective regions of the body disproportionately through genetic mosaicism. CLINICAL PRESENTATION: A 40-year-old man had intractable neuropathic anterior right chest wall pain in the distribution of T2 and T3. Magnetic resonance imaging and computed tomography of the chest revealed masses deep to the second and third ribs in the axilla. Biopsy of a subcutaneous nodule in the right chest wall revealed a small neurofibroma. An extensive workup revealed no masses outside the region of the right chest wall and no stigmata of NFI. INTERVENTION: The patient underwent right-sided thoracoscopy for identification of the intrathoracic neurofibromas and placement of spinal needles to localize the anterior and posterior extent of the masses. These landmarks were used to guide a transaxillary approach to third rib resection and nerve-sparing neurofibroma resection. CONCLUSION: Isolated adjoining intercostal plexiform neurofibroma is a unique presentation of mosaic NFI. Because of its limited penetrance, this variant may present as a regional pain syndrome. Thoracoscopy can be used effectively to guide intercostal nerve sheath tumor resection.

Abdominal Neoplasms↗
PubMed1992

Thoracoscopic resection of a posterior mediastinal neurogenic tumor.

Advances in endoscopic instrumentation and a growing enthusiasm for minimally invasive surgical techniques have sparked renewed interest in therapeutic thoracoscopy. We report the successful thoracoscopic resection of a posterior mediastinal nerve sheath tumor. A 35-year-old asymptomatic woman was found to have a posterior mediastinal mass on chest roentgenogram. Computed tomography and magnetic resonance imaging confirmed the presence of the lesion and showed no evidence of intraspinal extension. Exploratory thoracoscopy revealed a localized lesion without intraspinal extension. Thoracoscopic resection of the lesion was then performed. The patient's postoperative course was uncomplicated and she was discharged on the fifth postoperative day. The therapeutic potential of thoracoscopy continues to be realized as experience with the technique grows.

Adult↗
PubMed1993

Survival and talc pleurodesis in metastatic pleural carcinoma, revisited. Report of 125 cases.

STUDY OBJECTIVE: To find out whether patients with different types of metastatic pleural carcinomas have significant differences in survival, as related to pleural fluid glucose and pH. A second objective was to evaluate the outcome of talc poudrage for pleurodesis. DESIGN: Cohort analytic prospective study; follow-up of patients from thoracoscopic diagnosis and evaluation to death. SETTING: Pulmonary department at a referral medical center. PATIENTS: One hundred twenty-five patients with metastatic pleural carcinoma diagnosed by thoracoscopy were evaluated prospectively. One patient was lost to follow-up. INTERVENTIONS: Thoracoscopy was performed in every patient, with talc pleurodesis performed at the end of each procedure. MEASUREMENTS AND RESULTS: On the same day as thoracoscopy or the previous day, glucose levels and pH of both the blood and pleural fluid were determined. The outcome of talc poudrage was that pleural effusions were controlled in 104 out of 119 patients (87 percent). Pleurodesis failed in 43 percent (6/14) of the patients with a pleural fluid pH lower than 7.20, as opposed to 9 percent (8/92) of failures in patients with a pH above this limit (p < 0.01). Average survival was as follows: nonsmall cell lung cancer (n = 40), 4.3 months (range, 1 to 15 months); small cell lung cancer (n = 8), 3.7 months (1 to 12 months); breast carcinoma (n = 30), 7.4 months (1 to 29 months); and ovarian carcinoma (n = 8), 9.4 months (1 to 29 months). There was a significant difference in survival between patients with breast carcinoma and patients with cancer not sensitive to chemotherapy (7.4 vs 4.7 months; p < 0.02), although the pleural tumor lesion rating was even greater in the first group. We found no significant differences between lung carcinomas and those from other origins. Patients with a low pleural fluid glucose level and low pH had significantly shorter survival than the group with high glucose and high pH levels (1.9 vs 5.7 months, respectively; p < 0.005). CONCLUSIONS: We confirmed our previous data demonstrating poor survival in patients with pleural effusions with low glucose and pH levels. The outcome of talc pleurodesis correlated to these same parameters. These results apply to all kinds of metastatic pleural carcinomas.

Adult↗
PubMed1994

Thoracoscopic lobectomy with mediastinal sampling in 80-year-old patients.

The purpose of this study was to determine whether thoracoscopy would allow standard lung cancer operations to be performed safely and completely in 80-year-old patients. Elderly patients with lung cancer are usually offered compromise treatment (either radiation or wedge resection) for early-stage lung cancer because their operative risk for lobectomy or pneumonectomy is increased. This study consists of nine patients, 80 to 82 years of age, who underwent either lobectomy (eight cases) or left pneumonectomy (one case) with mediastinal node sampling by thoracoscopy. There were no deaths or major complications. Seven of the nine patients were discharged by the fifth postoperative day. The hospital stay was prolonged in two patients due to air leak or persistent chest tube drainage (11 and 13 days, respectively). The use of thoracoscopy does allow standard lung cancer treatment to be offered to selected elderly patients.

Age Factors↗
PubMed1997

The clinician's perspective on pneumothorax management.

OBJECTIVE: We sought to determine the current practice habits among clinicians treating spontaneous pneumothorax and bronchopleural fistula. METHODS: Practice habits were determined by a randomized postal survey of 3,000 American College of Chest Physicians members. Group comparisons are performed by chi2 analysis with p<0.05 being significant. RESULTS: Four hundred nine respondents (13.6%) included 176 practicing pulmonologists (43.0%), 67 academic pulmonologists (16.4%), 102 thoracic surgeons (25.0%), and 64 others (15.6%). More than 50% of respondents treat a first small primary spontaneous pneumothorax (PSP) by simple observation, a first small secondary spontaneous pneumothorax (SSP) by chest tube, persistent air leak in both PSP and SSP with chest tube+video-assisted thoracoscopy, and use a 20 to 24F chest tube in mechanically ventilated ARDS-related tension pneumothorax. First recurrences of PSP and SSP were treated by a variety of interventions that included simple observation (PSP=14%, SSP=4%), chest tube (22%/17%), chest tube+sclerosis (20%/16%), chest tube+video-assisted thoracoscopy (36%/48%), and chest tube+thoracotomy (5%/12%). The most popular sclerosing agents are doxycycline (48%), talc slurry (24%), and talc poudrage (19%). More than 75% of physicians intervened in a persistent air leak between 5 and 10 days. Chest tubes are initially placed to suction by 48% of respondents in PSP and removed >24 h after air leak ceases in 79%. Chest tube clamping prior to removal is employed by 67% of respondents. Significant differences exist between thoracic surgeons and pulmonologists with surgeons placing more chest tubes for first-time PSP and performing chest tube+video-assisted thoracoscopy for first recurrences of PSP more often than pulmonologists. Thoracic surgeons seldom use sclerosis in spontaneous pneumothorax compared to pulmonologists. CONCLUSIONS: Marked practice variation exists in clinicians' approaches to the management of spontaneous pneumothorax and bronchopleural fistulas that is partially explained by differences between pulmonologists and thoracic surgeons. A national consensus statement is needed to guide randomized studies in pneumothorax management.

Anti-Bacterial Agents↗
PubMed1997

Minimally invasive staging for esophageal cancer.

Thoracoscopy is an excellent means for staging esophageal cancer. Staging of esophageal carcinoma facilitates prognostication and allocation of patients to appropriate treatment regimens. Thoracoscopy is also useful in biopsies of direct mediastinal invasion. Routine thoracoscopic and laparoscopic lymph node staging has been used in patients with esophageal carcinoma with excellent results. Thoracoscopy can allocate patients for neoadjuvant therapy and help avoid an unnecessary thoracotomy in patients found to have gross spread of locoregional disease.

Adenocarcinoma↗
PubMed1998

Advances in staging of esophageal carcinoma.

Staging criteria for thoracic malignancies are based on survival groupings that allow the stage groups to be used as prognosticators for cancer treatment. Definitive staging of esophageal cancer facilitates allocation of patients to appropriate treatment regimens according to each patient's stage. Existing noninvasive staging methods are imperfect in detecting abdominal and thoracic lymph node metastases in patients with esophageal cancer. Thoracoscopy is an excellent means for staging the chest and mediastinum. We have used thoracoscopic lymph node staging and laparoscopic lymph node staging for esophageal cancer since 1992. Thoracoscopy was performed in 45 patients with biopsy specimen-proved carcinoma of the esophagus. Laparoscopy was done in the last 20 patients. Laparoscopic-assisted feeding jejunostomies were performed in patients with obstructive symptoms. Directed liver biopsies were performed if lesions were present. Thoracoscopy was aborted in three patients because of adhesions. Thoracic lymph node stage was N0 in 40 patients and N1 in 3. Celiac lymph nodes were normal in 14 patients and abnormal in 6. Esophageal resection was performed in 30 patients after thoracoscopic lymph node staging; 18 of these underwent laparoscopic lymph node staging. Thoracoscopic staging showed N0 lymph node status in 28 patients and N1 in 2. Two of these N0 patients (7%) were found at resection to have paraesophageal lymph involvement (N1). Thoracoscopic lymph node staging was accurate in detecting the status of thoracic lymph nodes in 28 of 30 cases (93%). Laparoscopic staging found normal celiac nodes in 13 patients and abnormal lymph nodes in 5. After esophagectomy, final pathologic finding of the 13 N0 patients was N0 in 12 patients and N1 in 1 patient. Thus, laparoscopic lymph node staging was accurate in detecting lymph node status in 17 of 18 patients (94%). Six of 20 patients undergoing laparoscopy had unsuspected celiac axis lymph node involvement missed by standard noninvasive techniques. Three percent of thoracic lymph nodes and 17% of celiac lymph nodes were downstaged after preoperative chemoradiotherapy. Thoracoscopic and laparoscopic lymph node staging are more accurate than existing staging methods.

Esophageal Neoplasms↗
PubMed2005

Clinical efficacy and safety of thoracoscopic talc pleurodesis in malignant pleural effusions.

STUDY OBJECTIVES: In patients with disseminated neoplastic disease, recurrent pleural effusion is frequently observed. The purpose of this study was to determine the long-term efficacy and safety of pleurodesis by thoracoscopic talc poudrage (TTP) in malignant pleural effusions (MPEs). METHODS: We report a consecutive series of 102 patients (45 women, 57 men; 20 to 83 years of age) who underwent medical thoracoscopy and TTP for recurrent MPE between 1999 and 2001. Thoracoscopy was performed utilizing local anesthesia and IV sedation (medical thoracoscopy). For pleurodesis, an average of 8 g of sterile talc powder was used. One hundred eighty-day follow-up was completed for all patients, and outcome measures included time to recurrence of the effusion and survival. Efficacy was judged by clinical examination, chest radiograph, and/or thoracic ultrasound examination. Procedure-related complications were documented. RESULTS: The most common primary neoplasms were lung cancer (n = 48), breast cancer (n = 16), and malignant pleural mesothelioma (n = 10). Twenty-eight patients had other types of tumors, including renal cell carcinoma, ovarian carcinoma, GI tumors, prostate, malignant lymphoma, and unknown primary cancer. At the end of the primary observation period of 180 days, 38 of 46 surviving patients (82.6%) had a successful pleurodesis. Type of primary neoplasm had no significant influence on success rate. The 30-day mortality rate was 16.7% (n = 17). Survival curves after 180 days showed significant differences, with best survival in mesothelioma and shortest life expectancy in lung cancer (p = 0.005). Adverse effects included empyema in one case and malignant invasion of the scar. No episode of talc-induced ARDS was observed. CONCLUSION: Thoracoscopic talc pleurodesis is a safe and effective method to stop recurrent MPEs. Lasting pleural symphysis is obtained.

Adult↗
PubMed1983

Points to consider when choosing a biopsy method in cases of pleurisy of unknown origin.

Blind pleural needle biopsy and diagnostic thoracoscopy are procedures sometimes used in the work-up of a patient with pleural effusion of unknown origin. We reviewed 203 diagnostic thoracoscopies in patients with malignant pleural effusion to show the different location of pleural metastasis, some out of the reach of blind needle biopsy. Based on these data, we find diagnostic thoracoscopy a superior procedure because of its higher reliability, faster diagnostic results, slight or no complications, and the possibility of carrying out pleurodesis in the same examination.

Biopsy, Needle↗
PubMed1987

Pleurodesis in spontaneous pneumothorax by means of tetracycline. Follow-up evaluation of a method.

The validity of previous recommendation of early thoracoscopy and tetracycline pleurodesis in the management of spontaneous pneumothorax without thoracoscopically visualized true cyst was assessed under non-trial, normal hospital conditions. Among 46 patients treated during a year, seven underwent immediate thoracotomy following finding of large cysts. Of the remaining 39 patients, 11 had recurrence of pneumothorax after a median of 11 (range 2-64) weeks. Repeat thoracoscopy then showed large cyst or bullous emphysema in seven cases. Tetracycline pleurodesis was again performed in the others. In continued observation for at least 2 years there were no further recurrences. The importance of meticulous thoracoscopy is stressed. The demonstrated diagnostic errors do not detract from the value of tetracycline pleurodesis when spontaneous pneumothorax is caused by rupture of only tiny blebs on the surface of an otherwise healthy lung. The procedure is fast, simple and efficacious.

Adolescent↗
PubMed1995

Thoracoscopic resection of parenchymal blebs in spontaneous pneumothorax. Indications, operative management and results.

The success rate of thoracoscopic resection of parenchymal blebs in spontaneous pneumothorax was evaluated after 54 thoracoscopies (cases) in 52 patients. Switch to open thoracotomy was necessitated by interpleural adhesions or large bullae in five cases, while 49 were treated thoracoscopically. The median duration of the operation was 75 (25-240) min, and the postoperative hospital stay was 7 (3-25) days. Early postoperative complications were haemothorax and recurrence of pneumothorax, each in one case, treated with thoracoscopy and chest drain, respectively. Forty-six patients were followed up for a median of 11 (1-32) months. there were two recurrences (at 4 and 6 months). One was successfully treated with thoracoscopy and the other with thoracotomy. Only five patients complained of slight sensitivity in the scar area, caused by weather changes. Thoracoscopic bleb resection is an effective alternative to thoracotomy, with low rates of complications and recurrent pneumothorax.

Adolescent↗
PubMedDate not supplied

Thoracoscopic correction of persistent right aortic arch in a dog.

A 15-week-old, male intact, miniature schnauzer presented for signs consistent with persistent right aortic arch (PRAA). Esophagram and esophagoscopy confirmed this diagnosis. Following selective intubation, the constricting ligamentum arteriosum was visualized and completely resected via thoracoscopy. No complications were noted with this procedure. Advantages of thoracoscopy for management of persistent right aortic arch observed in this case were better visualization of the ligamentum arteriosum, minor postoperative discomfort, and minimal intraoperative hypothermia. Therefore, thoracoscopy is a potential alternative to intercostal thoracotomy for correction of PRAA.

Animals↗
PubMed2000

Malignant pleural diseases.

The incidence of malignant pleural effusions has been increasing over the last few decades (mainly due to the absolute increase in several types of cancers, especially those of lung and breast origin) and they account for up to 50% of the exudates in many clinical series. Although pleural malignancies are thought to present most frequently with a pleural effusion, several autopsy series, including the current one, found a pleural effusion present in little more than half of the cases of malignant pleural involvement (55% in this series). Thus, many pleural malignancies without effusion might pass unnoticed in clinical practice, especially in metastatic disease. Primary malignancies of the pleura (mesotheliomas) are associated with asbestos exposure in about two-thirds of cases, and they frequently present with chest pain, sometimes associated with a pleural effusion. Benign pleural plaques can coexist with malignant mesothelioma, and this association should be suspected when long-standing plaques change in shape or size over the years, and especially if chest pain develops in a previously asymptomatic patient. Metastatic pleural involvement is much more frequent than mesotheliomas, and its most frequent mechanism is the vascular spreading of tumour cells from distant organs to the lungs, and on to the visceral and parietal pleura. The visceral pleura was involved in up to 87% of the current metastatic cases, whereas the parietal zone in only 47% of the autopsy series. The diagnostic work-up lies in cytology, whose average yield is approximately 50%, and a biopsy technique (either by blind needle biopsy or thoracoscopy) is recommended when the effusion persists, for > 2 weeks, and the first cytology has been negative. Thoracoscopy has the additional advantage of allowing pleurodesis with talc poudrage if clear tumour lesions are found in the pleura. In cases of malignant effusion which are not sensitive to chemotherapy, pleurodesis is the treatment of choice for palliation of symptoms, and talc is the most effective agent. It can be used either in suspension ("slurry") or in dry aerosolized form ("talc poudrage"), but it seems that this last technique achieves the best effects. However, it requires thoracoscopy for a proper application, and this is its main drawback when that technique is not readily available.

Humans↗
PubMed2000

[Stage-adapted therapy of pleural empyema. Results during 1992-1998].

Despite the decreasing number of patients suffering tuberculosis and the use of modern broad spectrum antibiotics the pleural empyema did not lose its relevance. The main reasons are increasing numbers of patients with drug and alcohol abuse or immunodeficiency of different causes. We retrospectively analysed the data of 73 patients treated of pleural empyema between 1992 and 1998. Considering the known stages of pleural empyema we present the corresponding therapeutic results. All patients classified as stage I were treated with a chest drain and cure was achieved in all of them (100%). The treatment for patients classified as stage II was different: 5 out of 32 were treated with a continuous irrigation and suction chest drain system. 18 patients first underwent thoracoscopy and were afterwards treated with a continuous irrigation and suction system. Another 9 patients primarily underwent an early open decortication. In 40% the treatment with the suction and irrigation system was successful. Using video-assisted thoracoscopy (VATS) cure was achieved in 94.4%, with open decortication in 100%. The preferred treatment of patients classified as stage III is the open decortication. After the first operation 80% (30 patients) were cured. 6 patients needed thoracoplastic procedures after the first intervention. No patient was discharged neither with a permanent chest drain nor a permanent thoracic window. With the results a cause dependent analysis of morbidity and mortality was done. The overall morbidity rate was 27.9% and the overall mortality 5.4%. The treatment of pleural empyema still remains to be problematic. Corresponding to our results pleural empyema classified as stage I is best treated with a simple chest tube. The video-assisted thoracoscopy (VATS) lacks of complications and is a very efficient method in treating stage II. The method of choice in stage III is the open decortication which in the case of a chronic and recurrent or persistent infection should be followed by a thoracoplastic procedure.

Adolescent↗
PubMed2000

[Thoracoscopic pleural biopsy under local anesthesia using a 2 mm laparoscope].

Thoracoscopy is indicated in patients with undiagnosed effusion after conventional methods. It has been usually performed under general anesthesia or using a thoracoscope with a thoracoscope with a diameter over 5 mm. However, it is an invasive diagnostic technique. We evaluated the feasibility of thoracoscopic pleural biopsy under local anesthesia using a 2 mm laparoscope. Six patients with a pleural effusion of unknown etiology after conventional methods, underwent thoracoscopy under local anesthesia. A 2 mm laparoscope and biopsy forceps (2 mm Minisite, United States Surgical Corp., USA) was used in all patients. Pleural fluid was removed, and the thoracic cavity was inspected. Thoracoscopic intercostal blocks were performed with 1% lidocaine, and then a biopsy was performed. The biopsy specimen was sent for histopathology. Three patients were shown to have carcinomatous pleurisy, two of them with localized lesions less than 10 mm. In the remaining three patients, non-specific diagnoses were made, but long-term follow-up revealed no malignant pleural disease. Although the pictures obtained using a 2 mm laparoscope were inferior in quality, they were adequate for the detection of malignant lesions in the pleural cavity. There were no procedure-related complications. These findings suggest that thoracoscopy using a 2 mm laparoscope is (1) a useful diagnostic tool in cases of pleural malignancy; (2) a minimally invasive method with the advantage of being easily performed under local anesthesia. Thus, thoracoscopic pleural biopsy using a 2 mm laparoscope appears to be useful for undiagnosed pleural effusion.

Anesthesia, Local↗
PubMed2001

[Minimally invasive surgery for diverticula of the thoracic esophagus. Results in 11 patients].

OBJECTIVES: Surgical treatment of diverticula of the esophagus is associated with substantial mortality and morbidity. Few data have been published concerning results of minimally invasive surgery. The aim of the study was to retrospectively assess the results of minimally invasive surgery (either thoracoscopy or laparoscopy) in a first series of patients with diverticula of the thoracic esophagus. METHODS: Eleven consecutive patients with symptomatic thoracic diverticula of the esophagus were operated on between December 1992 and March 1999. Five were operated on by right thoracoscopy, 4 by laparoscopy and 2 by thoracoscopy and laparoscopy. The procedure performed varied according to the location and the macroscopic aspect of the diverticulum, as well as of the associated disorders (gastroesophageal reflux, hiatal hernia and/or motor disorders). RESULTS: Postoperative mortality was nil. Three patients developed an esophageal fistula; one with an esophago-bronchial fistula required another operation. Postoperative pain was treated with morphine (median duration 4 days) or IV paracetamol (5 days). Long term results were excellent in 1 patient, good in 6, fair in 2 and poor in 2. These 2 latter patients were operated on another time. One of them was operated on 3 years later for aperistalsis of the esophagus and the other one was operated 4.5 years later for paraesophageal hernia; late results of these operations were fair. CONCLUSION: These results suggest that minimally invasive surgery does not confer significant benefit compared with open surgery in the treatment of diverticula thoracic esophagus.

Acetaminophen↗