Amyloidoma and Plasmacytoma Presented as a Solitary Lung Nodule in a Patient of Multiple Myeloma With AL-Amyloidosis: A Case Report and Review of Literature.

Nodular amyloidoma in the lungs is a rare entity, also the occurrence of extramedullary plasmacytoma (EMP) in the lungs is rare. To have concomitant EMP and amyloidoma presented as a single lung mass is even rarer. There was only one similar case reported in the abstract form previously. Our case did not respond to many novel chemotherapy agents, suggesting that this combination of amyloidoma and plasmacytoma belonged to a poor prognosis entity, requiring different treatment modalities, such as early bone marrow transplantation or CART (chimeric antigen receptors T) therapy.

Comparison of three-dimensional reconstruction and CT-guided Hook-wire segmental resection for pulmonary nodules: a propensity score matching study.

OBJECTIVE: To analyze and compare the clinical application value of three-dimensional reconstruction and computed tomography (CT)-guided Hook-wire localization for row lung segment resection of pulmonary nodules. METHODS: Retrospective analysis of the clinical data of 204 patients suffering from pulmonary nodules admitted to the Department of Thoracic Surgery of Gansu Provincial People's Hospital from June 2016 to December 2022. According to the preoperative positioning method, the group was divided into a 3D reconstruction group (98 cases) and a Hook-wire group (106 cases), respectively. The two groups of patients were propensity score matching (PSM) to compare their perioperative outcomes. RESULTS: All patients in both groups underwent successful surgeries without perioperative deaths. After PSM, 79 patients were successfully matched in each group. Two cases of pneumothorax, three cases of hemothorax, and four cases of decoupling occurred in the Hook-wire group; no complications of pneumothorax, hemothorax, and decoupling occurred in the 3D reconstruction group. Compared to the Hook-wire group, the 3D reconstruction group has shorter operative time (P = 0.001), less intraoperative bleeding (P < 0.001), less total postoperative chest drainage (P = 0.003), shorter postoperative tube placement time (P = 0.001), shorter postoperative hospital stay (P = 0.026), and postoperative complications (P = 0.035). There was no statistically significant difference between the two groups in terms of pathological type, TNM staging, and number of lymph node dissection. CONCLUSION: Three-dimensional reconstruction and localization of pulmonary nodules enables safe and effective individualized thoracoscopic anatomical lung segment resection with a low complication rate, which has good clinical application value.

Lipolymph node presenting as a pulmonary nodule: A case report.

A 53-year-old man was admitted to our hospital with a history of a right lung nodule which had gradually increased in size. Wedge resection of the right middle lobe using video-assisted thoracoscopic surgery (VATS) was performed and revealed a yellowish, soft, well circumscribed nodule. Histological analysis confirmed the diagnosis of an uncommon lipolymph node. The patient recovered well from surgery, and there has been no recurrence in the lung for over one-year of follow-up. To the best of our knowledge, this is the first report of a lipolymph node in the lung.

Dynamic changes on chest CT of COVID-19 patients with solitary pulmonary lesion in initial CT.

PURPOSE: To investigate the dynamic evolution of image features of COVID-19 patients appearing as a solitary lesion at initial chest CT scan. MATERIALS AND METHODS: Twenty-two COVID-19 patients with solitary pulmonary lesion from three hospitals in China were enrolled from January 18, 2020 to March 18, 2020. The clinical feature and laboratory findings at first visit, as well as characteristics and dynamic evolution of chest CT images were analyzed. Among them, the CT score evaluation was the sum of the lung involvement in five lobes (0-5 points for each lobe, with a total score ranging from 0 to 25). RESULTS: 22 COVID-19 patients (11 males and 11 females, with an average age of 40.7 ± 10.3) developed a solitary pulmonary lesion within 4 days after the onset of symptoms, the peak time of CT score was about 11 days (with a median CT score of 6), and was discharged about 19 days. The peak of CT score was positively correlated with the peak time and the discharge time (p < 0.001, r = 0.793; p < 0.001, r = 0.715). Scan-1 (first visit): 22 cases (100%) showed GGO and one lobe was involved, CT score was 1.0/1.0 (median/IQR). Scan-2 (peak): 15 cases (68%) showed crazy-paving pattern, 19 cases (86%) showed consolidation, and 2.5 lobes were involved, CT score was 6.0/12.0. Scan-3 (before discharge): ten cases (45%) showed linear opacities, none had crazy-paving pattern, and 2.5 lobes were involved, CT score was 6.0/11.0. Scan-4 (after discharge): three cases (19%) showed linear opacities and one lobe was involved, CT score was 2.0/5.0. CONCLUSION: The chest CT features are related to the course of COVID-19 disease, and dynamic chest CT scan are helpful to monitor disease progress and patients' condition. In recovered patients with COVID-19, the positive CT manifestations were found within 4 days, lung involvement peaking at approximately 11 days, and discharged at about 19 days. The patients with more severe the lung injury was, the later the peak time appeared and the longer the recovery time was. Although the lesion was resolved over time, isolation and reexamination were required after discharge.

Management of Pulmonary Nodules in Oncologic Patients: AJR Expert Panel Narrative Review.

Cancer survivors are at higher risk than the general population for development of a new primary malignancy, most commonly lung cancer. Current lung cancer screening guidelines recommend low-dose chest CT for high-risk individuals, including patients with a history of cancer and a qualifying smoking history. However, major lung cancer screening trials have inconsistently included cancer survivors, and few studies have assessed management of lung nodules in this population. This narrative review highlights relevant literature and provides expert opinion for management of pulmonary nodules detected incidentally or by screening in oncologic patients. In patients with previously treated lung cancer, a new nodule most likely represents distant metastasis from the initial lung cancer or a second primary lung cancer; CT features such as nodule size and composition should guide decisions regarding biopsy, PET/CT, and CT surveillance. In patients with extrapulmonary cancers, nodule management requires individualized risk assessment; smoking is associated with increased odds of primary lung cancer, whereas specific primary cancer types are associated with increased odds of pulmonary metastasis. Nonneoplastic causes, such as infection, medication toxicity, and postradiation or postsurgical change, should also be considered. Future prospective studies are warranted to provide evidence-based data to assist clinical decision-making in this context.

[Multiple insufficiency fractures (metatarsial, calcaneal and sacral) as the first manifestation of lung adenocarcinoma. A case report and literature review]. / Fracturas múltiples por insuficiencia (metatarsianos, calcáneo y sacro) como signo inicial de adenocarcinoma pulmonar. Caso clínico y revisión de la literatura.

Insufficiency fractures, or pathological fractures, are produced after minimal trauma or no prior trauma and normally affect weakened bone. Their presence should be suspected in fractures showing abnormal patterns, when several fractures occur in a short period of time and in those with no apparent or only minimal trauma. On confirmation of an insufficiency fracture, a differential diagnosis should be made between tumoral and metastatic fractures if there is a history of underlying primary malignancy. The epidemiology of lung cancer has changed due to women's adoption of smoking. In women, the most frequent type of lung cancer is adenocarcinoma, which is less aggressive and has lower mortality, with 5-year survival of 9.5%. Consequently, in Spain, 44% of pulmonary nodules are due to adenocarcinomas. Therefore, all solitary pulmonary nodules should be followed-up for at least 5 years. A history of solitary pulmonary nodule is found in one out of every 1,000 x-rays. However, in patients younger than 35 years, only 1% is malignant. In persons with a history of malignancy and age older than 35 years, this percentage increases to 68%. Size larger than 3cm increases the percentage of malignancy to up to 93%. Therefore, in female smokers older than 50 years with a history of solitary pulmonary nodule, the nodule should be considered malignant until demonstrated otherwise. We report for the first time in Spain the case of a woman with risk factors (smoking, age older than 50 years, with a 3-cm solitary pulmonary nodule that showed no significant growth in 3 years) who had multiple insufficiency fractures in a short period of time. Rehabilitation therapy was unsuccessful and the patient underwent investigation for malignancy. Unfortunately, histopathological study confirmed that the fractures were the initial manifestation of lung adenocarcinoma.

Quantification of Perinodular Emphysema in High-risk Patients Offers No Benefit in Lung Nodule Risk-Stratification of Malignancy Potential.

PURPOSE: Pulmonary nodules, found either incidentally or on lung cancer screening, are common. Evaluating the benign or malignant nature of these nodules is costly in terms of patient risk and expense. The presence of both global and regional emphysema has been linked to increased lung cancer risk. We sought to determine whether the measurement of emphysema directly adjacent to a lung nodule could inform the likelihood of a nodule being malignant. MATERIALS AND METHODS: Within a population of Veterans at high risk for lung cancer, 58 subjects with malignant nodules found on computerized tomographic chest scans were matched by lobe and nodule size to 58 controls. Lung densitometry was measured via determination of the low attenuation area percentage at -950 Hounsfield units (LAA950) and the Hounsfield unit (HU) value at which 15% of lung voxels have a lower lung density (Perc15), at predefined lung volumes that encompassed the nodule to evaluate both perinodular and regional lung fields. The association between measured lung density and malignancy was investigated using conditional logistic regression models, with densitometry measurements used as the primary predictor, adjusting for age alone, or age and computerized tomographic scan characteristics. RESULTS: No significant differences in emphysema measurements between malignant and benign nodules were identified at lung volumes encompassing both perinodular and regional emphysema. Furthermore, emphysema quantification remained stable across lung volumes within individuals. CONCLUSIONS: In this study, quantifying the degree of perinodular or regional emphysema did not offer any benefit in the risk stratification of lung nodules.

Coexistence of nontuberculous mycobacterium and IgG4-related disease in a solitary pulmonary nodule: A case report.

RATIONALE: Immunoglobulin G4-related disease (IgG4-RD) is regarded as an immune-mediated systemic fibroinflammatory disease. Several studies have linked IgG4-RD to infections such as tuberculosis and actinomycosis. However, the coexistence of IgG4-RD and non-tuberculous mycobacterium (NTM) in a single pulmonary nodule has not been reported yet. PATIENT CONCERNS: A 76-year-old male patient presented with cough and sputum. A solitary pulmonary nodule suspicious of lung cancer was found on chest CT. DIAGNOSIS: Through video-assisted thoracoscopic biopsy, a diagnosis of co-existing NTM and IgG4-RD in a single nodule was made. INTERVENTIONS: Antibiotic treatment was applied for pneumonia developed after surgery. The patient was also supported by extracorporeal membrane oxygenation and mechanical ventilation since his pneumonia was refractory to medical treatment. OUTCOMES: The patient expired on the 60th postoperative day due to multiple organ failure. LESSONS: IgG4-RD can occur singularly or accompanied by other diseases. We report a solitary pulmonary nodule caused by NTM and concurrent IgG4-RD, suggesting a possible association between these 2 entities. Immunologic relations between IgG4-RD and accompanying infection should be further investigated.

Embolia gaseosa arterial: una rara complicación de la biopsia con aguja gruesa en el diagnóstico del nódulo pulmonar solitario / Arterial Gas Embolism: A Rare Complication of Core Needle Biopsy in the Diagnosis of Solitary Pulmonary Nodule

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Symptomatic pulmonary sclerosing hemangioma: a rare case of a solitary pulmonary nodule in a woman of advanced age.

BACKGROUND: Pulmonary sclerosing hemangioma (PSH) is a rare tumor that usually develops in middle-aged Asian women. PSH has four histological types (hemorrhagic, sclerotic, solid, and papillary) and often grows slowly in a lower lobe of the lung. Preoperative misdiagnosis frequently occurs because of the absence of specific clinical manifestations and imaging findings. Few reports have described PSH in women of advanced age. Case presentation: A 75-year-old woman presented to our hospital in China with a 5-day history of productive cough and intermittent hemoptysis. Computed tomography indicated bronchiectasis and a large mass in the left inferior lobe of the lung. Treatment of the bronchiectasis provided no symptom relief. The hemoptysis resolved following left lower pulmonary lobectomy, and PSH was pathologically diagnosed following surgery. At the time of this writing (after 6 months of follow-up), the tumor had not recurred, no metastases had been detected, and close follow-up was ongoing. CONCLUSIONS: Both bronchiectasis and PSH can cause hemoptysis. This case demonstrates that PSH should be included as a differential diagnosis of hemoptysis in women of advanced age. For patients with chronic hemoptysis, the diagnosis of PSH should be considered if the therapeutic effect of bronchiectasis is poor.

Survival and metastasis in muscle-invasive bladder cancer patients who present with indeterminate pulmonary nodules before treatment.

BACKGROUND: Indeterminate pulmonary nodules (IPNs) are common during initial evaluation of bladder cancer patients. Their significance is still unknown. OBJECTIVE: Determine the significance of indeterminate pulmonary nodules, including their size and number, in muscle-invasive bladder cancer patients before definitive local therapy by surgery or chemo-radiotherapy. DESIGN: Retrospective review, single-center descriptive study. SETTINGS: A tertiary cancer center. PATIENTS AND METHODS: We performed a retrospective review of patients who underwent definitive local therapy of bladder cancer by either radical cystectomy and lymph node dissection or with chemo-radiotherapy between January 1997 and December 2015. We identified patients with baseline CT scans done during staging work-up prior to definitive treatment. Patients with proven clinical metastasis at pre.sentation were excluded, while patients who had IPNs without features suggesting metastasis were included. MAIN OUTCOME MEASURES: Disease-free survival and overall survival. SAMPLE SIZE: 168 patients. RESULTS: The median age of patients at diagnosis was 66 years; 92% were males and 56% were smokers. IPNs (3 cm or less) were present in 74 patients (44.0%). Median follow-up was 24 months. IPNs were associated with decreased disease-free survival while IPNs did not affect the overall survival (HR=1.9; 95% CI: 1.1-3.4); P=.01 and HR=1.5; 95% CI: 1.0-2.5); P=.07, respectively. In addition, nodules greater than 1 cm had reduced disease-free survival (HR=2.5; 95% CI: 1.1-5.9); P=.04. In the surgery group (n=126), the median number of lymph nodes excised was 14, with no association between lymph nodes status and the presence of IPNs (P=.08). CONCLUSION: The presence of IPNs, especially nodules greater than 1 cm had a negative effect on disease-free survival. Tailored postoperative follow-up of these patients may impact disease outcomes. LIMITATIONS: The retrospective nature, the lack of standardized preoperative imaging protocols, the lack of a central radiology review and the small number of patients. CONFLICT OF INTEREST: None.

PET Counting Response Variability Depending on Tumor Location, Activity, and Patient Obesity: A Feasibility Study of Solitary Pulmonary Nodule Using Monte Carlo.

We aim to investigate the counting response variations of positron emission tomography (PET) scanners with different detector configurations in the presence of solitary pulmonary nodule (SPN). Using experimentally validated Monte Carlo simulations, the counting performance of four different scanner models with varying tumor activity, location, and patient obesity is represented using a noise equivalent count rate (NECR). NECR is a well-established quantitative metric which has positive correlation with clinically perceived image quality. The combined effect of tumor displacement and increased activity shows a linear ascending trend for NECR with slope ranges of (12.5-18.2)*10-3 (kBq/cm3)-1 for three-ring (3R) scanners and (15.3-21.5)*10-3 (kBq/cm3)-1 for four-ring (4R). The trend for the combined effect of tumor displacement and patient obesity is exponential decay with 3R configurations weakly dependent on the patient obesity if the tumor is located at the center of the field of view with exponent's range of (6.6-33.8)*10-2cm-1. The dependence is stronger for 4R scanners (9.6-38.5)*10-2cm-1. The analysis indicates that quantitative PET data from the same SPN patient possibly examined in different time points (e.g., during staging or for the evaluation of treatment response) are affected by the different detector configurations and need to be normalized with patient weight, activity, and tumor location to reduce unwanted bias of the diagnosis. This paper provides also with a proof of concept for the ability of properly tuned simulations to provide additional insights into the counting response variability especially in tumor types where often borderline decisions have to be made regarding their characterization.

Nodular rheumatoid arthritis (RA): A distinct disease subtype, initiated by cadmium inhalation inducing pulmonary nodule formation and subsequent RA-associated autoantibody generation.

Nodular rheumatoid arthritis (RA) patients have raised rheumatoid factor (RF) and anti-citrullinated protein antibody (ACPA) levels, and are more likely to smoke than RA patients without nodules. Subcutaneous and pulmonary rheumatoid nodules (granulomas) frequently co-exist. Pulmonary rheumatoid nodules develop prior to RA development and have the immunological machinery to generate RF and ACPAs. Pulmonary granulomas have been observed in animal models exposed to cadmium (Cd) inhalation. Cigarette smoke increases pulmonary Cd exposure. It has been suggested that dust and cigarette smoke co-exposure increases localised pulmonary Cd adsorption. We hypothesise that subcutaneous nodular RA represents a distinct disease subtype induced by pulmonary rheumatoid nodule formation and the generation of high levels of RA associated autoantibodies initiated by Cd inhalation via cigarette smoke. Cohorts of RA patients attending rheumatology clinics in Cornwall, UK (total n = 504) were studied to determine the prevalence of nodular RA, with matched analysis (age, gender and social class) to compare urinary Cd, RF and ACPA levels stratifying for nodular disease and smoking. In cohort 1 45/303 (14.9%) of the RA patients under regular follow up had nodular disease. Of the RA smokers, 30/155 (19%) were nodular and of the RA non-smokers 15/148 (10%) were nodular. Smoking was significantly associated with nodular RA, odds ratio (OR) = 2.48 95% confidence interval (CI) 1.26-4.88, p = 0.008. Raised urinary Cd levels were significantly associated with nodular RA in non-dust exposed individuals, OR 2.26 (95% CI 1.08-4.73), p = 0.03 compared to dust exposed individuals, OR 0.78 (95% CI 0.35-1.76), p = 0.557, despite fewer pack years (py) at diagnosis (16 vs 20 py). Nodular RA smokers had significantly raised RF levels compared to RA smokers without nodular disease (median RF 171.5 (interquartile range (IQR) 48-394) vs median RF 31.7 (IQR 10.3-170.3), p < 0.00001). RF positivity was significantly more prevalent in nodular RA smokers compared to RA smokers without nodular disease (84/89 (94%) vs. 141/199 (71%), OR = 6.9 (95% CI 2.66-17.91), p < 0.00001). ACPA levels were also significantly raised in nodular smokers compared to non-nodular smokers (median ACPA 250 (IQR 145-426) vs 116 (1-257.5), p < 0.00001), as were ACPA positivity rates (83/89 (93%) vs 123/191 (64%), OR = 7.65 (95% CI 3.17-18.4), p < 0.0001). These pilot results support the hypothesis that nodular RA represents a distinct disease subtype initiated by cadmium inhalation, which we suggest induces pulmonary rheumatoid nodule formation and generation of RA-associated autoantibodies.

Rare presentation of Candida albicans: infective endocarditis and a pulmonary coin lesion.

We present a case of a rare association of infective endocarditis and a coin lesion in the lung caused by Candida albicans. The lesion disappeared after 6 weeks of treatment with 5 mg/kg/day amphotericin B.

Chest High-resolution Computed Tomography Findings in 601 Patients with Inflammatory Bowel Diseases.

RATIONALE AND OBJECTIVES: Pulmonary involvement in inflammatory bowel disease may reflect the common embryonic origin of the gastrointestinal tract and the bronchial tree. No studies have compared pulmonary high-resolution computed tomography (HRCT) findings between ulcerative colitis (UC) and Crohn disease (CD). This study aimed to assess the relationship between pulmonary HRCT findings and inflammatory bowel disease activity and to compare HRCT findings between UC and CD. MATERIALS AND METHODS: We retrospectively identified 601 consecutive patients (350 with UC and 251 with CD) who had undergone chest HRCT examinations at our institutions between April 2004 and April 2016. Parenchymal abnormalities, enlarged lymph nodes, and pleural effusion were evaluated on HRCT. RESULTS: One hundred sixty-seven patients (94 men, 73 women; aged 12-86 years, mean: 47.2 years) with UC and 93 patients (61 men, 32 women; aged 12-71 years, mean: 37.9 years) with CD had abnormal findings on chest HRCT. The HRCT findings of UC and CD mainly consisted of centrilobular nodules (in 49.1% and 45.2% of cases, respectively) and bronchial wall thickening (in 31.7% and 54.8%, respectively). There was no relationship between HRCT findings and disease activity. Bronchial wall thickening was significantly more frequent in patients with CD than in those with UC (P < .001). CONCLUSION: The main chest HRCT findings in UC and CD are centrilobular nodules and bronchial wall thickening. There are differences in HRCT findings between UC and CD.