[Successful Treatment of Blow-out Type Left Ventricular Free Wall Rupture Using Sutureless Technique].

Blow-out type left ventricular free wall rupture is a serious complication of acute myocardial infarction, that carries high hospital mortality rates and poor surgical outcome. We report the case of an 88-year-old woman who developed cardiac tamponade following percutaneous coronary angioplasty for acute myocardial infarction. She was diagnosed with left ventricular free wall rupture, and rupture type was proved to be blow out after median sternotomy. To address this critical condition, we opted for the sutureless technique for its minimally invasive nature and ability to preserve left ventricular function. The patient was discharged from the hospital without any complications 22 days after surgery. Considering favorable, encouraging outcomes of this case, sutureless technique could be regarded as a viable option for blow-out type left ventricular free wall rupture.

Temporal and spatial dynamics of immune cells in spontaneous liver transplant tolerance.

The liver has long been deemed a tolerogenic organ. We employed high-dimensional mass cytometry and immunohistochemistry to depict the temporal and spatial dynamics of immune cells in the spleen and liver in a murine model of spontaneous liver allograft acceptance. We depicted the immune landscape of spontaneous liver tolerance throughout the rejection and acceptance stages after liver transplantation and highlighted several points of importance. Of note, the CD4+/CD8+ T cell ratio remained low, even in the tolerance phase. Furthermore, a PhenoGraph clustering analysis revealed that exhausted CD8+ T cells were the most dominant metacluster in graft-infiltrating lymphocytes (GILs), which highly expressed the costimulatory molecule CD86. The temporal and spatial dynamics of immune cells revealed by high-dimensional analyses enable a fine-grained analysis of GIL subsets, contribute to new insights for the discovery of immunological mechanisms of liver tolerance, and provide potential ways to achieve clinical operational tolerance after liver transplantation.

Surgical treatment for coarctation of the aorta.

Key Clinical Message: Surgical treatment is a better option for coarctation of the aorta. Abstract: A 56-year-old man was admitted to the hospital due to chest pain. Computed tomography showed severe coarctation of the aorta distal to the left subclavian artery, with poststenotic dilatation of the descending aorta. A descending aortic replacement was performed in an uneventful manner. The postoperative course was good without symptoms.

Serum steroid metabolite profiling by LC-MS/MS in two phenotypic male patients with HSD17B3 deficiency: Implications for hormonal diagnosis.

Although 17ß-hydroxysteroid dehydrogenase type 3 (HSD17B3) deficiency is diagnosed when a testosterone/androstenedione (T/A-dione) ratio after human chorionic gonadotropin (hCG) stimulation is below 0.8, this cut-off value is primarily based on hormonal data measured by conventional immunoassay (IA) in patients with feminized or ambiguous genitalia. We examined two 46,XY Japanese patients with undermasculinized genitalia including hypospadias (patient 1 and patient 2). Endocrine studies by IA showed well increased serum T value after hCG stimulation (2.91 ng/mL) and a high T/A-dione ratio (4.04) in patient 1 at 2 weeks of age and sufficiently elevated basal serum T value (2.60 ng/mL) in patient 2 at 1.5 months of age. Despite such partial androgen insensitivity syndrome-like findings, whole exome sequencing identified biallelic ″pathogenic″ or ″likely pathogenic″ variants in HSD17B3 (c .188 C>T:p.(Ala63Val) and c .194 C>T:p.(Ser65Leu) in patient 1, and c.139 A>G:p.(Met47Val) and c.672 + 1 G>A in patient 2) (NM_000197.2), and functional analysis revealed reduced HSD17B3 activities of the missense variants (∼ 43% for p.Met47Val, ∼ 14% for p.Ala63Val, and ∼ 0% for p.Ser65Leu). Thus, we investigated hCG-stimulated serum steroid metabolite profiles by liquid chromatography-tandem mass spectrometry (LC-MS/MS) in patient 1 at 7 months of age and in patient 2 at 11 months of age as well as in five control males with idiopathic micropenis aged 1 - 8 years, and found markedly high T/A-dione ratios (12.3 in patient 1 and 5.4 in patient 2) which were, however, obviously lower than those in the control boys (25.3 - 56.1) and sufficiently increased T values comparable to those of control males. The elevated T/A-dione ratios are considered be due to the residual HSD17B3 function and the measurement by LC-MS/MS. Thus, it is recommended to establish the cut-off value for the T/A-dione ratio according to the phenotypic sex reflecting the residual function and the measurement method.

Coral calcium carried hydrogen ameliorates the severity of non-alcoholic steatohepatitis induced by a choline deficient high carbohydrate fat-free diet in elderly rats.

Hydrogen has been reported to act as an antioxidant, anti-apoptosis and anti-inflammatory agent. Coral calcium carried hydrogen (G2-SUISO) is a safer and more convenient form of hydrogen agent than others. The mechanism underlying the hepatoprotective effects of G2-SUISO using an elderly non-alcoholic steatohepatitis (NASH) rat model was investigated. Two days after fasting, six-month-old elderly male F344/NSlc rats were given a choline deficient high carbohydrate fat-free (CDHCFF) diet from day 0 to day 3 as CDHCFF control group, and then switched to a normal diet from days 4 to 7 with or without 300 mg/kg G2-SUISO. Rats in each group were finally being sacrificed on day 3 or day 7. In the CDHCFF diet group, G2-SUISO decreased the liver weight-to-body weight ratio, the serum AST, ALT, total cholesterol levels, inflammatory infiltration, pro-inflammatory cytokine expression and lipid droplets with inhibiting lipogenic pathways by reducing sterol regulatory element-binding protein-1c, acetyl-CoA carboxylase and fatty acid synthase gene expression compared with the CDHCFF diet alone. G2-SUISO had beneficial effects of anti-apoptosis as well the down-regulation of pro-apoptotic molecules including NF-κB, caspase-3, caspase-9 and Bax. These findings suggest that G2-SUISO treatment exerts a significant hepatoprotective effect against steatosis, inflammation and apoptosis in elderly NASH rats.

Distribution and prognostic impact of EGFR and KRAS mutations according to histological subtype and tumor invasion status in pTis-3N0M0 lung adenocarcinoma.

BACKGROUND: The prognostic impact of EGFR mutation as major targetable somatic gene variant on lung adenocarcinoma is controversial. KRAS is another major somatic variant in lung adenocarcinoma, and a therapeutic agent for KRAS G12C became available in clinical settings. These mutations represent clinicopathological features of lung adenocarcinoma and can guide the treatment choice after recurrence. We evaluated the prognostic impact of EGFR and KRAS mutations by considering other clinicopathological recurrence risks in resected pTis-3N0M0 lung adenocarcinoma. METHODS: Clinicopathological features related to recurrence and genetic status were estimated in consecutive 877 resected cases. Recurrence-free survival (RFS), cumulative recurrence rate (CRR), and overall survival (OS) were compared. Uni- and multivariate analyses for RFS were performed after excluding cases with little or no recurrence risks. RESULTS: EGFR mutation was more likely to be harbored in female, never-smoker, or patients accompanied by > 5% lepidic component. KRAS mutation was more likely to be harbored in patients with current/ex-smoking history, International Association for the Study of Lung Cancer (IASLC) grade 3, or accompanied lymphatic or vascular invasion. In IASLC grade 2 and 3 patients, EGFR or KRAS mutation cases had significantly worse 5-year RFS than wild type patients (76.9% vs. 85.0%, hazard ratio [HR] = 1.55, 95% confidence interval [CI] = 1.62-6.41, P < 0.001). EGFR or KRAS mutation cases had significantly higher 5-year CRR than wild type patients (17.7% vs. 9.8%, HR = 1.69, 95% CI = 1.44-6.59, P = 0.0038). KRAS mutation cases had higher 5-year CRR than EGFR mutation cases (16.7% vs. 21.4%, HR = 1.62, 95% CI = 0.96-7.19, P = 0.061). There was no significant difference in OS between cohorts. Multivariate analysis revealed that a positive EGFR/KRAS mutation status was risk factor for worse RFS (HR = 2.007, 95% CI = 1.265-3.183, P = 0.003). CONCLUSION: Positive EGFR and KRAS mutation statuses were risk factors for recurrence in resected IASLC grade 2 and 3 patients. KRAS mutations were more likely to be confirmed in cases with an increased risk of recurrence. EGFR and KRAS mutation statuses should be evaluated simultaneously when assessing the risk of recurrence.

Impact of the amount of preoperative erector spinae muscle in stage I non-small-cell lung cancer.

OBJECTIVES: Erector spinae muscle (ESM) is an antigravity muscle group that can be evaluated as an index of muscle loss on chest computed tomography. The amount of ESM has been reported to be related to the prognosis of several respiratory diseases. However, few studies clarify the impact on postoperative non-small-cell lung cancer (NSCLC). We investigated the relationship between ESM and postoperative prognosis in patients with early-stage NSCLC. METHODS: We reviewed the medical records of 534 patients with stage I NSCLC who underwent lobectomy or segmentectomy. The ESM was identified by preoperative computed tomography, and the amount was normalized according to height and sex. Overall survival, lung cancer-related deaths and non-lung cancer-related deaths (NLCRD) were analysed using log-rank and Gray's tests. Multivariable analyses were conducted to identify factors that influenced overall survival (OS) and NLCRD. RESULTS: The amount of ESM normalized according to height and sex was significantly associated with age and body mass index. When the amount was low, OS (5-year OS, 79.6 vs 89.5%; P< 0.001) and NLCRD (5-year cumulative mortality rate, 14.7 vs 6.8%; P< 0.001) were significantly worse, although no difference was found in lung cancer-related deaths. CONCLUSIONS: The amount of preoperative ESM was strongly related to non-lung cancer-related death and was a significant prognostic factor for stage I NSCLC. Patients with a low amount of the muscle should be treated based on proper risk assessment.

A surgical treatment for frank rupture of acute type a small intramural hematoma.

A 71-year-old woman was admitted to the hospital due to cardiac tamponade. Computed tomography revealed that the diameter and wall thickness of the ascending aorta were 36 and 9 mm, respectively. An emergent ascending aortic replacement was performed uneventfully. The pathological findings indicated frank rupture of intramural hematoma.

High Rate of Radiographic Union at the Fibular Osteotomy Site With No Complications After an Acute Oblique Osteotomy and Ligation Procedure to Shorten the Fibula in High Tibial Osteotomy.

Background: A fibular shortening osteotomy is needed to perform lateral closing-wedge high tibial osteotomy (LCW-HTO). To achieve this shortening, we have recently developed an acute oblique osteotomy and ligation (AO/L) procedure for the center of the fibular shaft, based on the AO procedure. Purpose: To compare the 2-year follow-up outcomes between the AO/L procedure and the AO procedure. Study Design: Cohort study; Level of evidence, 2. Methods: A prospective comparative cohort study was conducted involving 83 patients (83 knees) who underwent shortening osteotomy of the fibula in LCW-HTO between April 2017 and March 2019. The first consecutive 41 knees (AO group) underwent fibular osteotomy with the AO procedure. The remaining 42 knees (AO/L group) underwent fibular osteotomy with the AO/L procedure. All of the patients were evaluated for at least 2 years postoperatively via clinical and radiological assessments. To determine the time needed for complete union at the osteotomy site, we evaluated the radiographs using a radiographic union score for tibial fractures, which was modified for fibular osteotomy. Comparison of outcomes between the 2 groups was performed using the Student t test for continuous variables and the Mann-Whitney U test or Fisher exact test for discrete variables. Results: Around the fibular osteotomy site, no perioperative complications were found in either group. The radiographic union score was significantly higher in the AO/L group than in the AO group (P < .0001 at 2, 3, and 6 months; P = .0290 at 12 and 24 months). The union rate at the fibular osteotomy site was significantly higher in the AO/L group (97.6%) than in the AO group (82.9%) at 12 months (P = .0290). Conclusion: The AO/L procedure significantly accelerated the formation of bridging callus at the fibular osteotomy site and provided a significantly higher union rate compared with the AO procedure. Both AO/L and AO procedures were free from perioperative complications. These results suggest that the AO/L procedure is clinically useful as an osteotomy procedure to shorten the fibula in LCW-HTO.

[Right Anterior Minithoracotomy as an Effective Technique for Minimally Invasive Aortic Valve Replacement in Frail and Elderly Patient:Report of a Case].

Transcatheter aortic valve replacement has increasingly been used as a standard treatment option for patients with aortic valve stenosis, especially in the frail and the elderly. However, it is not recognized as a valid treatment for patients with aortic valve regurgitation. In this study, we report our experience in conducting a right anterior minithoracotomy for a minimally invasive aortic valve replacement in the elderly. An 87-year-old woman with severe aortic valve regurgitation was admitted to our department. Minimally invasive aortic valve replacement was performed, through a right anterior minithoracotomy in the second intercostal space. A localized transverse aortotomy was performed at a position higher than that in an ordinary aortotomy. Our procedure for aortic valve replacement was similar to the conventional method. The postoperative course was uneventful, and the patient was discharged after 10 days. Therefore, we conclude that right anterior minithoracotomy for a minimally invasive aortic valve replacement is a feasible, effective, and safe technique.

Combinations of anti-GITR antibody and CD28 superagonist ameliorated dextran sodium sulfate-induced mouse colitis.

Ulcerative colitis (UC) is one of the two main forms of inflammatory bowel disease (IBD) and is an idiopathic, chronic inflammatory disease of the colonic mucosa with an unclear etiology. Interleukin (IL)-10 has been reported to play a crucial role in the maintenance of immune homeostasis in the intestinal environment. Type 1 regulatory T (Tr1) cells are a subset of CD4+Foxp3- T cells able to secrete high amounts of IL-10 with potent immunosuppressive properties. In this study, we found that the combination of anti-GITR antibody (G3c) and CD28 superagonist (D665) treatment stimulated the generation of a large amount of Tr1 cells. Furthermore, G3c/D665 treatment not only significantly relieved severe mucosal damage but also reduced the incidence of colonic shortening, weight loss, and hematochezia. Dextran sodium sulfate (DSS) upregulated the mRNA levels of IL-6, IL-1ß, IL-17, IL-12, tumor necrosis factor-alpha, C-C chemokine receptor type 5, and Bax in splenic lymphocytes (SPLs) and colon tissues, while G3c/D665 treatment conversely inhibited the increase in mRNA levels of these genes. In addition, G3c/D665 treatment altered the proportion of CD4+ and CD8+ T cells and increased CD4+CD25+Foxp3+ regulatory T cells in SPLs, mesenteric lymph nodes (MLNs), and lamina propria lymphocytes (LPLs). Thus, the combination of G3c and D665 treatment showed efficacy against DSS-induced UC in mice by inducing a large amount of Tr1 cell generation via the musculoaponeurotic fibrosarcoma pathways in vivo and relieving inflammatory responses both systematically and locally.

[A Surgical Technique for Ascending Aorta-bifemoral Bypass and Coronary Artery Bypass Grafting without Aortic Cross-clamp].

A 69-year-old woman presented with symptoms of resting pain in the lower limb bilaterally. A computed tomography( CT) scan revealed occlusion of the infrarenal aorta and bilateral common iliac arteries, indicating Leriche syndrome. A coronary angiogram demonstrated in-stent restenosis in the left anterior descending coronary artery. Therefore, the patient underwent off-pump coronary artery bypass grafting (left mammary artery to left anterior descending coronary artery) and ascending aorta-bifemoral bypass using the HeartString device for the inflow anastomosis. The postoperative period was uneventful. Although an indication for this surgical technique should be tailored to the anatomy of the lesion, it is a reliable surgical option to achieve good outcomes.

[Acute Aortic Dissection after Reoperative Aortic Valve Replacement with Early Diagnosis:Report of a Case].

Acute aortic dissection is a rare and potentially catastrophic perioperative complication of cardiac surgery. A 72-year-old woman underwent aortic valve replacement with a bioprosthetic valve for aortic regurgitation seven years earlier. She experienced respiratory distress on exertion and was diagnosed with prosthetic valve dysfunction. Reoperative aortic valve replacement with a bioprosthetic valve was performed. On postoperative day eight, contrast-enhanced computed tomography, which was performed to evaluate persistent high levels of inflammatory response, revealed acute DeBakey typeⅠaortic dissection. Emergency ascending aortic replacement was successfully performed. The patient was discharged on postoperative day 19 without any complications. Acute aortic dissection after cardiac surgery is rare;however, physicians should be aware of this possible complication.

A Novel GaN:C Millimeter-Wave HEMT with AlGaN Electron-Blocking Layer.

An AlGaN/GaN/Si high electron mobility transistor (HEMT) using a GaN:C buffer with a 2 nm AlGaN electron-blocking layer (EBL) is investigated for the first time for millimeter-wave applications. Compared with the double heterostructure field effect transistor (DHFET), the AlGaN/GaN HEMT with the GaN:C/EBL buffer has a lower vertical leakage, higher thermal stability, and better RF performance. In addition, AlGaN EBL can prevent carbon-related traps from GaN:C and improve electron confinement in 2DEG during high-frequency operation. Finally, a Pout of 31.2 dBm with PAE of 21.7% were measured at 28 GHz at 28 V. These results demonstrated the great potential of HEMTs using GaN:C with AlGaN EBL epitaxy technology for millimeter-wave applications.

A Case of Non-hereditary White Sponge Nevus in the Oral Cavity Successfully Treated with Tetracycline Ointment and Oral Multivitamins.

White spongiform nevus is an autosomal dominant inherited disorder first reported by Cannon in 1935. It is a rare disease in which the oral mucosa thickens into an edematous and spongy state and is often accompanied by difficult to recognize subjective symptoms. We report a case of multiple non-hereditary white cavernous nevi in the oral mucosa. The subject was a 22-year-old man with a chief complaint of white lesions in his oral cavity. Examination revealed thick edematous and sponge-like white lesions on the bilateral buccal mucosa, upper and lower lip mucosa, and bilateral lingual margins. There was no history of similar lesions in his family or among his relatives. We diagnosed the case as non-hereditary white sponge nevus, based on clinical and histopathological findings. Although difficult to treat, the lesions disappeared with tetracycline ointment application and oral intake of multiple vitamin supplements. No recurrence of the lesion was observed thereafter.

Pathological high malignant grade is higher risk of recurrence in pN0M0 invasive lung adenocarcinoma, even with small invasive size.

INTRODUCTION: Tumor size is an absolute recurrence risk in lung cancer. Although morphological features also reflect recurrence risk, its significance among lower-risk cases characterized by small size is unknown. We aimed to evaluate the relationship between pathological invasive tumor size and morphological features, and their prognostic impact by considering them simultaneously in lung adenocarcinoma. PATIENTS AND METHODS: We retrospectively reviewed 563 pN0M0 patients with pathological invasive size of ≤40 mm. The patients were classified by pathological invasive size and pathological malignant grading using the proportion of subhistological components. The prognostic impact was evaluated using recurrence-free survival (RFS) and overall survival (OS). The impact on prognosis was evaluated using uni- and multivariate analyses. RESULTS: The proportion of histological grade changed according to invasive tumor size. Patients with high malignant grade (G3) showed worse RFS than those with low and intermediate malignant grade (G1+2) with invasive size ≤20 mm. The 5-year RFS (G1+2 vs. G3) in 5-10 mm was 96.0% vs. 83.3% (HR = 5.505, 95% CI = 7.156-1850, p < 0.001) and in 10-20 mm was 87.8% vs. 67.1% (HR = 2.829, 95% CI = 4.160-43.14, p < 0.001). G3 patients were significantly bigger in invasive size and included more pleural/lymphatic/vascular invasion and recurrence. Multivariate analysis indicated pathological G3 status was significantly associated with worse RFS (HR = 2.097, 95% CI = 1.320-3.333, p = 0.002). CONCLUSIONS: Invasive tumor size and pathological malignant grade overlap in invasive adenocarcinoma. G3 patients are more likely to have pleural/lymphatic/vascular invasion and significantly worse RFS compared to G1/G2 cases, even with a small invasive size of ≤20 mm.

Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee.

BACKGROUND: Post-arthroscopic osteonecrosis of the knee (PAONK) is a rare condition. No studies have analyzed the relationship between the meniscus extrusion and PAONK. The purpose of this retrospective study is to test a hypothesis that the degree of the medial meniscus (MM) extrusion might be significantly greater in the knees with PAONK than in the matched control knees both before and after the meniscectomy. METHODS: Ten knees with PAONK were detected out of a total of 876 knees which had undergone arthroscopic partial meniscectomy of the MM. Ten matched control knees were randomly selected out of the remaining 866 knees without PAONK. The clinical data of these 20 patients were retrospectively collected from the medical records. To evaluate the location of the menisci on the joint line, Extrusion width and Inner width were defined on a coronal section of magnetic resonance imaging (MRI). The intra- and inter-rater reliability was evaluated by calculating the intra- and inter-class coefficients. Statistical comparisons between the 2 groups were made using the 3 non-parametric tests. RESULTS: Before the meniscectomy, the Extrusion width of the MM (mean 4.7 ± 1.4 mm) was significantly greater than that (3.0 ± 1.3 mm) in the Control group (P = 0.0195). In the MRI taken in a range from 3 to 50 weeks after the meniscectomy, the Extrusion width of the MM (5.9 ± 1.1 mm) in the PAONK group was significantly greater than that (3.4 ± 1.4 mm) in the Control group (P = 0.0009), and the Inner width of the MM (0.6 ± 1.7 mm) in the PAONK group was significantly less than that (3.9 ± 1.0 mm) in the Control group (P = 0.0001). CONCLUSION: A significant relationship was found between the degree of the MM extrusion and the onset of PAONK. This study suggested that the extrusion of the MM is a potential predisposing factor for PAONK.

Recipient myeloperoxidase-producing cells regulate antibody-mediated acute versus chronic kidney allograft rejection.

Antibody-mediated rejection (ABMR) continues to be a major problem undermining the success of kidney transplantation. Acute ABMR of kidney grafts is characterized by neutrophil and monocyte margination in the tubular capillaries and by graft transcripts indicating NK cell activation, but the myeloid cell mechanisms required for acute ABMR have remained unclear. Dysregulated donor-specific antibody (DSA) responses with high antibody titers are induced in B6.CCR5-/- mice transplanted with complete MHC-mismatched A/J kidneys and are required for rejection of the grafts. This study tested the role of recipient myeloid cell production of myeloperoxidase (MPO) in the cellular and molecular components of acute ABMR. Despite induction of equivalent DSA titers, B6.CCR5-/- recipients rejected A/J kidneys between days 18 and 25, with acute ABMR, whereas B6.CCR5-/-MPO-/- recipients rejected the grafts between days 46 and 54, with histopathological features of chronic graft injury. On day 15, myeloid cells infiltrating grafts from B6.CCR5-/- and B6.CCR5-/-MPO-/- recipients expressed marked phenotypic and functional transcript differences that correlated with the development of acute versus chronic allograft injury, respectively. Near the time of peak DSA titers, activation of NK cells to proliferate and express CD107a was decreased within allografts in B6.CCR5-/-MPO-/- recipients. Despite high titers of DSA, depletion of neutrophils reproduced the inhibition of NK cell activation and decreased macrophage infiltration but increased monocytes producing MPO. Overall, recipient myeloid cells producing MPO regulate graft-infiltrating monocyte/macrophage function and NK cell activation that are required for DSA-mediated acute kidney allograft injury, and their absence switches DSA-mediated acute pathology and graft outcomes to chronic ABMR.

Comprehensive analysis of the clinicopathological features, targetable profile, and prognosis of mucinous adenocarcinoma of the lung.

PURPOSE: The clinicopathological or genetic features related to the prognosis of mucinous adenocarcinoma are unknown because of its rarity. The clinicopathological or targetable features were investigated for better management of patients with mucinous adenocarcinoma of the lung. METHODS: We comprehensively evaluated the clinicopathological and genetic features of 60 completely resected mucinous lung adenocarcinomas. Targetable genetic variants were explored using nCounter and polymerase chain reaction, PD-L1 and TTF-1 expression were evaluated using immunohistochemistry. We analyzed the prognostic impact using the Kaplan-Meier method and log-rank test. RESULTS: Of the 60 enrolled patients, 13 (21.7%) had adenocarcinoma in situ/minimally invasive adenocarcinoma, and 47 (78.3%) had invasive mucinous adenocarcinoma (IMA). Fifteen patients (25%) showed a pneumonic appearance on computed tomography (CT). CD74-NRG1 fusion, EGFR mutations, and BRAF mutation were detected in three (5%), four (6.7%), and one (1.7%) patient(s), respectively. KRAS mutations were detected in 31 patients (51.7%). Two patients (3.5%) showed immunoreactivity for PD-L1. No in situ or minimally invasive cases recurred. IMA patients with pneumonic appearance had significantly worse recurrence-free survival (RFS) and overall survival (OS) (p < 0.001). Furthermore, IMA patients harboring KRAS mutations had worse RFS (p = 0.211). Multivariate analysis revealed that radiological pneumonic appearance was significantly associated with lower RFS (p < 0.003) and OS (p = 0.012). KRAS mutations served as an unfavorable status for RFS (p = 0.043). CONCLUSION: Mucinous adenocarcinoma had a low frequency of targetable genetic variants and PD-L1 immunoreactivity; however, KRAS mutations were frequent. Pneumonic appearance on CT imaging and KRAS mutations were clinicopathological features associated with a worse prognosis.