Revisiting morphology of xiphoid process of the sternum in human: a comprehensive anatomical study.

BACKGROUND: The xiphoid process (XP) in animals such as sheep and rats are well known to have cartilage called xiphoidal cartilage (XC). In humans, the cartilage in the xiphoid process is considered an anatomical variant and is not well understood. The aim of this study was to investigate the morphology of the XP. METHODS: A total of twenty embalmed European descendant cadaveric sterna (aged 52 to 98 years) were used. Transilluminated XPs and midsagittal sections of XPs were used to examine the bone and cartilage. Subsequently, a sagittally-sectioned XP was harvested for histology and stained with Masson's trichrome. The results of the transillumination and histological examinations were compared qualitatively. RESULTS: The dark area visible in transilluminated XPs was consistent with the bony part in the midsagittal XP sections, which contained bone marrow; the bright area was consistent with the cartilage part in the midsagittal XP sections. This was all demonstrated histologically. Most of the XPs (85%) had some portion of cartilage. The XP was classified into four types based on its proportions of bone and cartilage: Type I, no ossification (< 1/3 ossification) 45%; Type II, minor ossification (1/3 - 1/2 ossification) 20%; Type III, major ossification (1/2-2/3 ossification) 20%; Type IV, complete ossification (> 2/3 ossification) 15%. Most of the XPs (85%) had bone and cartilage, which could have been overlooked in studies using skeletons or CT. CONCLUSION: Previous studies probably underestimated or overestimated the size of the XP. The XC needs to be considered as normal anatomy.

The clinical effectiveness of the corrected nose-earlobe-xiphoid distance formula in determining the internal length of a nasogastric tube in adults: A retrospective study.

INTRODUCTION: Accurate determination of the internal length of nasogastric tubes is essential for the safe and effective completion of blind insertions, a routine nursing procedure. The widely used nose-earlobe-xiphoid distance lacks evidence and effectiveness. A recent randomized controlled trial proposed an alternative, the corrected nose-earlobe-xiphoid distance formula. However, its effectiveness in real-world clinical practice has not yet been studied. OBJECTIVE: This study assessed the real-world clinical effectiveness of the corrected nose-earlobe-xiphoid distance formula for determining the internal nasogastric tube length in adult patients admitted to hospitalization or intensive care units. DESIGN: A single-center retrospective clinical effectiveness study was conducted, utilizing routinely collected observational data. SETTING AND MAIN OUTCOME MEASURES: Between October 2020 and November 2022, 358 adult patients in a general hospital requiring a nasogastric feeding tube were included. The primary outcome involved assessing nasogastric tube tip positioning (>3 cm below the lower esophageal sphincter) by an advanced practice nurse through X-ray verification. Secondary outcomes, obtained from patient records for a random subgroup of 100 participants, were reporting clarity and evaluation of the tip position by reviewing radiologists. RESULTS: Following evaluation by an advanced practice nurse, all nasogastric feeding tubes were determined to be correctly positioned. Among the subgroup of 100 tubes, X-ray protocols, as documented by the reviewing radiologists, showed varying levels of reporting clarity for the tube tip: 4.0 % lacked reporting, 33.0 % had ambiguous reporting and 63.0 % had unambiguous reporting. CONCLUSION: The corrected nose-earlobe-xiphoid distance formula demonstrates potential to emerge as a safer alternative to existing methods for determining the internal length of nasogastric tubes. IMPLICATIONS FOR CLINICAL PRACTICE: In addition to healthcare provider education and training, a checklist-based framework is recommended for radiologists to unambiguously report nasogastric tube tip positions.

Safety and feasibility of early mobilization in patients submitted to cardiac surgery using subxiphoid drain.

INTRODUCTION: Patients submitted to heart surgery are restricted to the bed of the Intensive Care Units (ICUs), due to this period of immobility the individual is likely to present clinical and functional alterations. These complications can be avoided by early mobilization; however, in some hospitals, this is not feasible due to the use of subxiphoid drain in the immediate postoperative period. OBJECTIVE: To verify the safety and feasibility of mobilizing patients after cardiac surgery using subxiphoid drain. METHODS: This was a prospective cohort study. On the first day the patient was positioned in sedestration in bed, then transferred from sitting to orthostasis, gait training and sedestration in an armchair. On the second postoperative day the same activities were performed, but with walking through the ICU with a progressive increase in distance. At all these moments, the patient was using the subxiphoid and intercostal drain. The patients were seen three times a day, but physical rehabilitation was performed twice. The adverse events considered were drain obstruction, accidental removal or displacement, total atrioventricular block, postoperative low output syndrome, cardiorespiratory arrest, pneumomediastinum, infection, and pericardial or myocardial damage. RESULTS: 176 patients were evaluated. Only 2 (0.4 %) of the patients had complications during or after mobilization, 1 (0.2 %) due to drain obstruction and 1 (0.2 %) due to accidental removal or displacement. CONCLUSION: Based on the data observed in the results, we found that the application of early mobilization in patients using subxiphoid drain after cardiac surgery is a safe and feasible conduct.

Risk factors for diaphragmatic injury in subxiphoid video-assisted thoracoscopic surgery.

BACKGROUND: Subxiphoid video-assisted thoracoscopic surgery (VATS) is considered a safe and feasible operation for anterior mediastinal mass resection. However, diaphragmatic injury, presented as tearing or puncturing, may occur during subxiphoid VATS despite of low incidence. This study aims to explore risk factors for diaphragmatic injury in subxiphoid VATS, as well as strategies to reduce occurrence of the injury. METHODS: We retrospectively reviewed clinical records of 44 consecutive adult patients who underwent subxiphoid VATS. These patients were divided into two groups: diaphragmatic injury group and non-injury group. Perioperative outcomes and anatomic features derived from 3D CT reconstructions were compared between the two groups. RESULTS: Significant differences were observed in operation time (223.25 ± 92.57 vs. 136.28 ± 53.05, P = 0.006), xiphoid length (6.47 ± 0.85 vs. 4.79 ± 1.04, P = 0.001) and length of the xiphoid below the attachment point on the diaphragm (24.86 ± 12.02 vs. 14.61 ± 9.25, P = 0.029). Odds ratio for the length of the xiphoid below the attachment point on the diaphragm was 1.09 (1.001-1.186), P = 0.048 by binary logistic regression analysis. CONCLUSIONS: We identified the length of the xiphoid below the attachment point on the diaphragm as an independent risk factor for diaphragm injury during subxiphoid VATS. Prior to subxiphoid VATS, a 3D chest CT reconstruction is recommended to assess the patients' anatomic variations within the xiphoid process. For patients with longer xiphoid process, a higher incision at the middle and upper part of the xiphoid process, and partial xiphoid process resection or xiphoidectomy is preferred.

Xiphodynia with limited decrease in the xiphoid process-sternal angle but recognised compression of the rectus abdominis.

A woman in her 70s presented with epigastric pain accompanied by radiating pain. Despite various examinations showing no abnormalities, tenderness was identified on palpation of the xiphoid process. The symptoms were alleviated with a local injection of lidocaine, leading to a diagnosis of xiphodynia. While previous cases have often reported a decrease in the xiphoid process-sternal angle, this case exhibited minimal reduction in the xiphoid process-sternal angle. Conversely, compression findings were observed in the soft tissues, including the rectus abdominis, anterior to the xiphoid process. This case report suggests that in the imaging diagnosis of xiphodynia, consideration of compression findings in the soft tissues anterior to the xiphoid process may also be valuable.

Prevalence and morphometry of sternal and xiphoid foramen: a meta-analysis on 16,666 subjects.

PURPOSE: Sternal foramen is a perforation of the sternum that can be a source of misdiagnosis during radiographic imaging or life-threatening perforations during bone marrow sampling. The aim of this study was to conduct a meta-analysis on the prevalence, morphometrics, and location of foramen in the sternal body and xiphoid process, describe morphometric features of this phenomenon, and thus verify its clinical importance. Moreover, our secondary outcome was to compare effectiveness of various imaging methods in diagnosis of the sternal or xiphoid foramen. METHODS: A comprehensive search was conducted on major scientific databases to identify studies containing relevant information. Data on foramen's prevalence, location, morphometrics, and accompanying findings were extracted and pooled into a meta-analysis using MetaXL 5.0. RESULTS: Thirty-five studies (n = 16,666 subjects) were included. The overall pooled prevalence of a foramen in the sternal body and/or a xiphoid process was 8.9% (95% CI 6.5-11.7) and it equaled 6.5% (95% CI 5.6-7.6) for sternal body alone and 2.9% (95% CI 0.5-6.9) for the xiphoid process. The foramen was more prevalent in males than in females (12.2% vs. 6.8%). The prevalence of sternal foramen was higher in South American [13.9% (95% CI 11.2-16.9)] and African [13.6% (95% CI 9.7-18.0)] studies compared to North American [6.2% (95% CI 5.0-7.5)] and European populations [8.6% (95% CI 3.1-16.3)]. Mean transverse and vertical diameter of foramen equaled 4.7 mm (95% CI 3.8-5.5), and 5.6 mm (95% CI 4.2-6.9), respectively. CONCLUSION: Our analysis proves that the sternal foramina are structures of significant prevalence and size. Any physician should keep them in mind when performing punctures in this area.

Anatomical variations of the sternum: sternal foramen and variant xiphoid morphology in dried adult human sternum in Ethiopia.

Background: The sternum exhibits unique anatomical variations with major clinical and forensic implications. This study is devoted to providing baseline epidemiological information about the sternal foramen and variant xiphoid morphology in Ethiopia. Two extremely interesting and unusual variations of the sternal foramen are also discussed. Methods: This observational study was carried out using dried adult human sternum obtained from skeletal remains samples brought for medicolegal examination over a period of 4 years. A total of 94 dried adult human sternums (66 males (70.2%) and 28 females (29.8%)) were obtained with an age range of 21 to 57 years and a mean age at death of 38.383 ± 11.3480 years. Dried human sternum specimens were morphologically examined, and morphometric parameters were recorded and photographed. Results: A sternal foramen was found in 18 specimens (19.1%); 17 were male and one was female. A single sternal foramen was observed in 83.3% (n=15/18) of the sternal bodies and 11.1% (n=2/18) of the xiphoid processes (both males). In addition, a double sternal foramen was observed in a single male specimen on the mesosternum and xiphoid process. The most common sternal foramen site was at the fifth costochondral junction level. The xiphoid process was present in 77 samples and ended as a single process in 83.1% (n=64/77) of samples. In 15.6% (n=12/77) of the samples, the xiphoid process was bifurcated and trifurcated in a single male (1.3%) specimen. Conclusions: The sternal foramen and variation in xiphoid morphology are common anatomical variations in Ethiopia. The findings of the current study highlight the necessity of strict precautionary measures during sternal procedures in this study population. In addition, such incidental findings during radiologic and autopsy procedures should be properly evaluated to avoid misdiagnosis and misinterpretation of such findings as traumatic or pathologic conditions.

Modified subcostal arch xiphoid thoracoscopic expanded thymectomy for thymic carcinoma: a case report and review of literature.

Thymic neoplasms are a relatively uncommon tumor, with the anterior mediastinum being the most common. Median sternotomy is the procedure of choice for the treatment of thymomas. With the advent of thoracoscopy, an increasing number of countries are adopting the right thoracic approach for the treatment of thymomas, but there are still no clear surgical standards or modalities to treat thymic carcinoma. We propose a modified subxiphoid subcostal arch thoracoscopic enlarged thymectomy to treat thymic carcinoma based on various reviews. We have also reviewed the relevant literature on the subject of evidence-based medicine. The evaluation of CD70 in combination with CD5 and CD117 or preferentially expressed antigen in melanoma in combination with CD5 and CD117 may help to diagnose thymic squamous cell carcinoma (TSCC) more accurately. The modified thoracoscopic expanded thymic resection under the costal arch of the xiphoid process is not only suitable for TSCC but also for thymic cyst, thymoma, locally invasive thymoma, and thymic carcinoma.

Clinical Application of Thoracoscopic Resection of Anterior Mediastinal Tumors under the Xiphoid Process.

Objective: To explore the feasibility and advantages of thoracoscopic resection of anterior mediastinal tumors through subxiphoid and lateral thoracic approaches. Method: 74 patients with anterior mediastinal tumors hospitalized in our hospital from January 2019 to January 2022 were retrospectively analyzed. They were divided into the lateral chest group (31 cases) and the infraxiphoid group (43 cases) according to different operation methods. The tumor size, operation time, intraoperative bleeding, postoperative pain score, postoperative complications, postoperative drainage tube removal time, and hospital stay were compared between the two groups. Result: The intraoperative bleeding and postoperative pain scores in the subxiphoid group were better than those in the lateral chest group. There was no significant difference in operation time and postoperative complications between the two groups. Conclusion: Compared with the lateral thoracic approach, the thoracoscopic subxiphoid approach can be more safe and effective in resectioning anterior mediastinal tumors.

Trifid and ventrally curved xiphoid process with two sternal foramina.

In this report, we present the case of a 56-year-old man with an asymptomatic, ventrally curved, trifid xiphoid process with two foramina found incidentally during a CT screening. The objective of this report is to advance the knowledge and recognition of such variations and to discuss the clinical relevance. The xiphoid process was trifid with two xiphoid foramina, one above the other, between the middle and right processes. The right process was longest (approximately 4 cm) and the middle process, the shortest (approximately 2 cm). The upper xiphoid foramen was larger (approximately 0.5 cm) than the lower one (approximately 0.3 cm). No additional musculoskeletal variations were observed on imaging. In summary, this constellation of distinctive variations of the xiphoid process in a single individual provide an opportunity to further discuss the development of the sternum, associated anatomical variations, and potential clinical ramifications from such variations in hopes of advancing knowledge and recognition of such anomalies for clinicians.

A xiphisternal ulcer effectively treated with xiphoidectomy.

Xiphoid syndrome is a rare musculoskeletal disorder of the xiphoid process. The main symptom is precordial pain or xiphodynia. We experienced a case in which protrusion of the xiphoid process impaired blood flow to the skin, resulting in the formation of an ulcer and exposure of the xiphoid process. To the best of our knowledge, this is the first case of a xiphisternal ulcer secondary to a protruding xiphoid process. The patient was safely and effectively treated via xiphoidectomy using a T-saw.

Frequency of sternal variations and anomalies in living individuals evaluated by MDCT.

PURPOSE: The aim of this retrospective study was to present the frequency and MDCT appearances of sternal variations and anomalies, as well as to highlight their clinical significance. METHODS: This retrospective study was carried out on 1150 patients, who underwent chest MDCT. Axial planes, multiplanar and curved-planar reconstructed images were studied. Age and sex distribution of the variations was evaluated. RESULTS: Anatomical variations of the sternum were found in 74.1%. The most frequent variation was the double-ended xiphoid process (36.9%), followed by the single xiphoidal foramen (25.8%) and the sternal sclerotic band (12.8%). Other variations observed were: sternal notch (10.1%), xiphoidal ligament calcification (8.3%), sternal foramen (4.9%), complete manubriosternal fusion (4.1%) and sternoxiphoidal fusion (4.1%), triple-ended xiphoid process (3.7%), sternal cleft (1.5%), whereas the rest of the variations including sternoxiphoidal junction pseudoforamen, suprasternal bone, pseudocleft, suprasternal tubercle and absence of xiphoid process were in less than 1%. In our subjects, sternal and xiphoidal foramina were adjacent to: the pericardium (37.14%), the diaphragm (22.9%), the mediastinal fat (17.1%), the liver (11.4%), the lung (8.5%) and to the stomach (2.9%). CONCLUSIONS: Sternal variations are frequent, asymptomatic, detected incidentally at cross-sectional imaging and may be confused with pathologic conditions. Radiologists should be familiar with these variations in order to discriminate them from pathologies and avoid complications during interventional procedures. ADVANCES IN KNOWLEDGE: This study presents thoroughly the sternal variations' MDCT appearance, detected in a Greek population, correlates them with age and gender and discuss their clinical significance in detail.

Operative results after xiphoidectomy in patients with xiphodynia.

BACKGROUND: Xiphodynia, the painful xiphoid process, is a rare condition with an atypical presentation. Symptoms differ in severity and site, and can consist of chest, throat, and upper abdominal pain. Primarily, other more severe causes of these symptoms need to be excluded. After this exclusion as xiphodynia is diagnosed, treatment can consist of a multitude of options, since there is no consensus regarding the optimal treatment. The aim of this study was to describe the outcomes and efficacy of one of the options, namely surgical resection of the xiphoid in patients with xiphodynia. METHODS: In this retrospective case series, all consecutive patients that underwent xiphoidectomy for xiphodynia between January 2014 and December 2017 were included. Patients' medical files including pre-operative work up, NRS scores, surgical outcomes, and follow up were reviewed. All patients received a questionnaire with follow-up questions. RESULTS: A total of 19 patients were included. None of the patients had surgery-related complications. Response rate of the questionnaire was 84% and showed that 94% of patients had an improvement of complaints after surgery, with 10 patients (63%) being totally pain free, after a mean follow-up from 34 months after surgery. CONCLUSIONS: Xiphoidectomy is feasible and safe for the treatment of patients with xiphodynia with an improvement of complaints in nearly all patients.

[Xiphoidectomy in a Patient with Severe Xiphodynia Induced by Asthma Attack:Report of a Case].

Xiphodynia is a rare condition, and only a few reports of xiphoidectomy have been published. A 48-year-old male patient was admitted to our medical department because of xiphodynia induced by a severe asthma attack. Computed tomography showed that his xiphoid process protruded forward, with a xiphisternal angle of 160 degrees. It was suggested that the pain induced at severe asthma attack was caused by the prominent xiphoid process and we performed xiphoidectomy, The postoperative course was uneventful, and xiphodynia was dramatically improved.

Deer antler extract potentially facilitates xiphoid cartilage growth and regeneration and prevents inflammatory susceptibility by regulating multiple functional genes.

BACKGROUND: Deer antler is a zoological exception due to its fantastic characteristics, including amazing growth rate and repeatable regeneration. Deer antler has been used as a key ingredient in traditional Chinese medicine relating to kidney and bone health for centuries. The aim of this study was to dissect the molecular regulation of deer antler extract (DAE) on xiphoid cartilage (XC). METHODS: The DAE used in this experiment was same as the one that was prepared as previously described. The specific pathogen-free (SPF) grade Sprague-Dawley (SD) rats were randomly divided into blank group (n =10) and DAE group (n =10) after 1-week adaptive feeding. The DAE used in this experiment was same as the one that was prepared as previously described. The rats in DAE group were fed with DAE for 3 weeks at a dose of 0.2 g/kg per day according to the body surface area normalization method, and the rats in blank group were fed with drinking water. Total RNA was extracted from XC located in the most distal edge of the sternum. Illumina RNA sequencing (RNA-seq) in combination with quantitative real-time polymerase chain reaction (qRT-PCR) validation assay was carried out to dissect the molecular regulation of DAE on XC. RESULTS: We demonstrated that DAE significantly increased the expression levels of DEGs involved in cartilage growth and regeneration, but decreased the expression levels of DEGs involved in inflammation, and mildly increased the expression levels of DEGs involved in chondrogenesis and chondrocyte proliferation. CONCLUSIONS: Our findings suggest that DAE might serve as a complementary therapeutic regent for cartilage growth and regeneration to treat cartilage degenerative disease, such as osteoarthritis.

Subxiphoid Endoscopic Epicardial Ventricular Tachycardia Ablation.

Ventricular tachycardia refractory to traditional therapies such as medical management and endocardial catheter ablation poses a risk for sudden cardiac death and poor quality of life. We describe a patient who was successfully treated for refractory symptomatic ventricular tachycardia using hybrid endocardial and minimally invasive epicardial ablation with a subxiphoid approach.