Prospective Observation Study for Primary Spontaneous Pneumothorax: Incidence of and Risk Factors for Postoperative Neogenesis of Bullae.

PURPOSE: Details of the neogenesis of bullae (NOB), which causes recurrent primary spontaneous pneumothorax (PSP) following bullectomy, have not been reported and risk factors for NOB remain unclear. We aimed to clarify the details of NOB. METHODS: We conducted a prospective study using three computed tomography (CT) examinations performed 6, 12, and 24 months after bullectomy to identify the incidence of and risk factors for NOB. We enrolled 50 patients who underwent bullectomy for PSP. RESULTS: After excluding 11 patients who canceled the postoperative CT examination at 6 months after bullectomy, only 39 patients were analyzed. The incidence of NOB at 6, 12, and 24 months after bullectomy was 38.5%, 55.2%, and 71.2%, respectively. The rate of NOB in the operated lung was almost 2 times higher than that in the contralateral nonoperative lung. Male sex, multiple bullae on preoperative CT, long stapling line (≥7 cm), deep stapling depth (≥1.5 cm), and heavier resected sample (≥5 g) were suggested to be risk factors for NOB. CONCLUSIONS: We recognized a high incidence of postoperative NOB in PSP patients. Bullectomy itself seems to promote NOB. Postoperative NOB occurs frequently, especially in patients who require a large-volume lung resection with a long staple line.

Fitofotodermatosis: el peligro del sol y las plantas para la piel / Phytofotodermatosis: the danger of the sun and plants for the skin

Presentamos el caso de un paciente que padeció una reacción cutánea intensa tras el contacto con los frutos y las hojas de una higuera y posterior exposición solar. Se trata de una reacción no inmunológica llamada fitofotodermatosis. Es una erupción inflamatoria de la piel que se produce tras el contacto con sustancias fototóxicas (furocumarinas o psoralenos) y que puede llegar a ser de gran intensidad. Por ello requiere una anamnesis exhaustiva y su conocimiento por parte del equipo médico de Atención Primaria y pediatría, ya que su diagnóstico diferencial puede ser muy complejo.(AU)

We report the case of a patient who developed an intense skin reaction after contact with the fruits and leaves of a fig tree and subsequent sun exposure. This is a non-immunological reaction called phytophotodermatosis. It is an inflammatory skin rash that occurs after contact with phototoxic substances (furocoumarins or psoralens) and could be very intense. That is why it requires an in-depth history; its knowledge by primary care physicians and paediatricians, is important because the differential diagnosis could be very complex.(AU)

[Recurrence of a Giant Emphysematous Bulla After Bullectomy:Report of a Case].

A 38-year-old male, he was diagnosed with a giant pulmonary bulla occupying 2/3 of the right thoracic cavity on chest computed tomography( CT). The preoperative pulmonary function was unfavorable, so bullectomy of right upper lobe with video-assisted thoracoscopic surgery( VATS) was performed. The outpatient follow-up was completed at 6 months after surgery. However, one year and eleven months postoperatively, the patient returned to the clinic complaining of dyspnea. Chest X-ray and CT showed a recurrence of a giant emphysematous bulla in the right upper lobe. Two years and three months after the initial surgery, the recurrent giant bulla was resected by right upper lobectomy with VATS. About four years after the reoperation, no recurrence of giant pulmonary bulla has been seen. Although there are some reports on surgical treatment and results of giant pulmonary bulla, there are few reports on recurrent cases, so we report this case.

Lo que esconde un prurito de larga evolución / What is hidden by extended course itching

Se presenta el caso de una mujer de 74 años que refiere prurito leve generalizado de 3 meses de evolución con aumento progresivo del mismo. Tras un seguimiento por parte de su médico de familia por la gran sintomatología referida, a pesar de seguir tratamiento con antihistamínicos y pauta corticoidea, y habiendo descartado analíticamente patología orgánica, se decide derivar a dermatología, donde finalmente se diagnostica penfigoide ampolloso autoinmune.(AU)

We report a 74-year-old woman with a gradual increase in generalized itching over three months. After her doctor’s monitoring because of her major symptoms and despite having been treated with antihistamines and corticosteroids, organic pathology was ruled out analytically. The patient was referred to dermatology where she was diagnosed with autoimmune bullous pemphigoid.(AU)

[Giant Bullae Misdiagnosed as Pneumothorax:Report of a Case].

A 46-year-old man was taken to a hospital by ambulance because of sudden onset of dyspnea, and was inserted chest drainage tube with a diagnosis of right-sided tension pneumothorax on chest X-ray. Since the chest drainage was not effective, he was transferred to our institute. Based on chest computed tomography (CT) findings, a diagnosis of giant bullae of the right lung was made, and surgical treatment was performed. Postoperatively, the improvement of respiratory function was confirmed.

Thoracic CT incidental pulmonary bullae in dogs: Characterization, interobserver variability, and general anesthesia risks.

Ruptures of pulmonary blebs and bullae are the most common cause of spontaneous pneumothorax in dogs. Incidental bullae/blebs have been documented in otherwise healthy people, however information for veterinary patients is currently lacking. Objectives of this retrospective, observer agreement, analytical study were to characterize incidental bullae in thoracic CT studies of dogs, assess interobserver variability for characterizing the bullae, and assess anesthesia risks. Inclusion criteria were dogs presenting for non-pneumothorax related reasons that had a thoracic CT at a single specialty and emergency hospital from 2012 to 2021 and had a bulla listed in the CT report. Medical records for dogs meeting inclusion criteria were reviewed to collect data on signalment, weight, total number of general anesthesia procedures 2 years prior and 2 years following the CT scan, and adverse anesthesia events. In addition, the CT images were reviewed by three American College of Veterinary Radiology-certified veterinary radiologists to collect data on the location, size, number of bullae and thickness of the bulla wall. A total of 1119 dogs met initial inclusion criteria and 74 dogs were included in analyses. There was no sex predilection for incidental pulmonary bullae. Bullae were more commonly found in older (median age 11.3 years), large breed dogs (median weight 20.7 kg). A solitary bulla of less than 1 cm was the most common finding with no apparent predilection for a particular lung lobe. There was strong correlation among the three radiologists for bulla location, size, and number, but weak correlations for bulla wall thickness. No adverse anesthesia events were found following CT anesthesia or following repetitive anesthesia procedures.

Excision of a giant lung bulla in a child: Repair of bronchial leaks using redundant bullous wall/membrane.

Large lung bullae are rare in children. We report a rare case of a large bulla in the right lung causing compression of the underlying lung with a shift of the mediastinum to the contralateral side. Excision of the bulla was done and a novel technique was used in the repair of bronchial air leakage sites with part of the bullous wall/membrane. The patient recovered well with re-expansion of the underlying collapsed lung.

Bronchoscopic Treatment of Giant Emphysematous Bullae with Endobronchial Silicone Plugs.

Purpose: Surgical bullectomy is the standard treatment of giant emphysematous bulla (GEB). However, bronchoscopic treatment should be considered as an alternative approach for patients who are unfit for surgical treatment. The study aimed to evaluate the clinical efficacy of endobronchial occlusion for the treatment of GEB using silicone plugs. Methods: This retrospective study recruited four patients with GEB who were unsuitable for surgery. Preoperative planning was performed using high-resolution computed tomography and a virtual bronchoscopic navigation system. Customized silicone plugs were then placed in the target airway via bronchoscopy to cause GEB regression and atelectasis. Results: All procedures were completed successfully in four patients. Three months after the procedures, compared with baseline, increases in the mean forced expiratory volume in 1 s (from 1.20 L/s to 1.33 L/s), forced vital capacity (from 2.63 L to 2.90 L), diffusion lung capacity for carbon monoxide (from 29% to 41% of the predicted value) and 6-minute walking test (from 412 m to 474 m) were observed. Additionally, the mean total lung capacity (from 6.80 L to 6.35 L), residual volume (from 3.97 L to 3.52 L), and St. George's Respiratory Questionnaire scores (from 67 to 45) were all lower than baseline data. Conclusion: Our preliminary results demonstrated that the endobronchial placement of silicone plugs could be a low-cost, safe, and effective choice for the treatment of GEB in surgically unfit patients.

Long-Term Follow-Up of Intralobar Bullae After Endobronchial Valve Treatment for Emphysema.

Endoscopic lung volume reduction using unidirectional endobronchial valves is a new technique in the treatment of patients with severe emphysema. However, the movements of the thoracic structures after endobronchial valves insertion are still unpredictable We report the unusual outcome of six patients after valves insertion in the left upper lobe. They all developed a complete atelectasis of the target lobe, a pneumothorax and sequential genuine bullae in the treated left lung of unknown etiology. The chest CT scan prior to the valves insertion was unremarkable. Three patients developed an air-liquid level in the bullae the day before a bacterial infection of their left lower lobe. The three other patients had an uneventful spontaneous resolution of their bullae at long-term follow-up. Therefore, a conservative attitude should be followed in this particular setting.

Expeditious Resolution of Giant Bullae with Endobronchial Valves and Percutaneous Catheter Insertion.

As bullae contribute to decreased lung function in chronic obstructive pulmonary disease (COPD) patients, effective decompression of large bullae is important. Bronchoscopic lung volume reduction via endobronchial one-way valves is less invasive and has a lower mortality rate than lung volume reduction surgery. We report the case of a 48-year-old male who presented with giant bullae that were expeditiously resolved with endobronchial valves and percutaneous catheter insertion. Three days later, imaging revealed marked decreases in the extent of bullae and atelectasis of the contralateral lung without any complications, including air leakage or pneumothorax. Combination of endobronchial valves and percutaneous catheter insertion might be helpful to accelerate the release of large bullae and to achieve improved lung function and higher levels of physical activity in patients with COPD.

Unexpected Histopathological Diagnosis of Placental Transmogrification of the Lung after Bullectomy for Recurrent Spontaneous Pneumothorax: A Case Report and Literature Review.

We report a 33-year-old man who presented with recurrent right pneumothorax. Computed tomography (CT) showed the presence of a large bulla with a maximum diameter of 8 cm in the right middle lobe; he subsequently underwent bullectomy. Histopathology revealed that pulmonary parenchyma adjacent to the bulla represented nodular proliferation of clear cells characterized by a papillary structure resembling placental chorionic villi. Immunohistochemically, clear cells were positive for CD10, suggesting placental transmogrification of the lung (PTL). We reviewed 36 surgical cases of PTL, and only 2 cases (5.6%), including our case, were operated for spontaneous pneumothorax. Bullous lesions secondary to PTL tend to appear as unilateral large cystic masses in non-upper lobes, which is atypical for primary spontaneous pneumothorax (PSP). Although PTL is considered a very rare cause of secondary pneumothorax, we must carefully differentiate this condition.

Axillary uniportal video-assisted thoracoscopic surgery for bullae is a cosmetically superior approach to primary spontaneous pneumothorax: a case report.

BACKGROUND: Bulla is a common cause of primary spontaneous pneumothorax. Video-assisted thoracoscopic surgery (VATS) through the lateral chest wall is a common surgical approach and an effective treatment for this condition, but postoperative incision scars affect the aesthetic outcome. VATS via axillary approach can hide the scar in the axilla, and the wound in its natural state is invisible; this greatly improves the cosmetic appearance. To our knowledge, this is the first report of VATS-based bullectomy via the axillary approach in a patient with spontaneous pneumothorax. CASE PRESENTATION: A 20-year-old female patient was admitted to the hospital with a 2-day history of chest tightness and chest pain. Plain chest computed tomography showed right spontaneous pneumothorax, lung compression of 75%, and right pulmonary bulla. After complete preoperative examination, VATS bullectomy via right axillary approach was performed. During the operation, a bulla measuring about 4 × 4 cm was found at the apex of the right lung and resected. The incision healed well, and the patient was discharged after surgery. CONCLUSIONS: VATS bullectomy via axillary approach is safe and feasible, with the incision hidden in the axilla and not visible in the natural state. This method leaves no scar on the chest wall and has good cosmetic outcome.

Computed tomography features of COVID-19 in children: A systematic review and meta-analysis.

BACKGROUND: There are few reports on the chest computed tomography (CT) imaging features of children with coronavirus disease 2019 (COVID-19), and most reports involve small sample sizes. OBJECTIVES: To systematically analyze the chest CT imaging features of children with COVID-19 and provide references for clinical practice. DATA SOURCES: We searched PubMed, Web of Science, and Embase; data published by Johns Hopkins University; and Chinese databases CNKI, Wanfang, and Chongqing Weipu. METHODS: Reports on chest CT imaging features of children with COVID-19 from January 1, 2020 to August 10, 2020, were analyzed retrospectively and a meta-analysis carried out using Stata12.0 software. RESULTS: Thirty-seven articles (1747 children) were included in this study. The heterogeneity of meta-analysis results ranged from 0% to 90.5%. The overall rate of abnormal lung CT findings was 63.2% (95% confidence interval [CI]: 55.8%-70.6%), with a rate of 61.0% (95% CI: 50.8%-71.2%) in China and 67.8% (95% CI: 57.1%-78.4%) in the rest of the world in the subgroup analysis. The incidence of ground-glass opacities was 39.5% (95% CI: 30.7%-48.3%), multiple lung lobe lesions was 65.1% (95% CI: 55.1%-67.9%), and bilateral lung lesions was 61.5% (95% CI: 58.8%-72.2%). Other imaging features included nodules (25.7%), patchy shadows (36.8%), halo sign (24.8%), consolidation (24.1%), air bronchogram signs (11.2%), cord-like shadows (9.7%), crazy-paving pattern (6.1%), and pleural effusion (9.1%). Two articles reported 3 cases of white lung, another reported 2 cases of pneumothorax, and another 1 case of bullae. CONCLUSIONS: The lung CT results of children with COVID-19 are usually normal or slightly atypical. The lung lesions of COVID-19 pediatric patients mostly involve both lungs or multiple lobes, and the common manifestations are patchy shadows, ground-glass opacities, consolidation, partial air bronchogram signs, nodules, and halo signs; white lung, pleural effusion, and paving stone signs are rare. Therefore, chest CT has limited value as a screening tool for children with COVID-19 and can only be used as an auxiliary assessment tool.