CT-based diagnosis in patients presenting with throat pain: A single institutional review.

RATIONALE AND OBJECTIVE: To determine if patient demographic data, medical history, physical examination, and laboratory tests will help predict likelihood of imaging-based diagnosis using CT of the neck performed in the ED for a chief complaint of throat pain. MATERIAL AND METHODS: Single institutional, retrospective review of 367 CT scans of the neck performed for the evaluation of throat pain in the ED from August 2013 to September 2019. Patients' clinical history, physical exams, lab findings, and imaging results were recorded. RESULTS: A total of 367 CT scans of the neck performed for the evaluation of throat pain included a recorded exam and clinical history. Of these cases, we noted that the presence of cervical lymphadenopathy (OR = 2.69; 95% CI, 1.37-5.49), tonsillar findings (OR = 2.94; 95% CI, 1.4-6.57), increased white blood cell count (OR = 1.08; 95% CI, 1.02-1.15), and temperature (OR = 1.94; 95% CI, 1.1-3.6) were associated with increased likelihood of obtaining a diagnostic CT scan. CONCLUSION: Consideration of tonsillar abnormalities, lymphadenopathy, body temperature, and measured leukocyte count prior to ordering CT scans of the neck for throat pain may increase the diagnostic yield of such exams and decrease CT utilization in the ED.

Utility of Soft Tissue Lateral Neck Radiographs in the Emergency Department: The 5-Year Experience of a Large Tertiary Care Pediatric Hospital.

INTRODUCTION: Although retropharyngeal infection (RPI) may present with voice change, drooling, fever, and a toxic appearance, diagnosis based on symptoms alone is unreliable. As incidence is increasing in children and drug-resistant bacterial strains such as methicillin-resistant Staphylococcus aureus are becoming more common, we decided to assess the clinical utility of lateral neck radiography. OBJECTIVE: The aim of this study was to review the experience of a large tertiary care pediatric emergency department (ED) in using lateral soft tissue neck radiographs in the diagnosis of suspected RPI. METHODS: A retrospective analysis of all lateral soft tissue neck radiograph reports from 2011 to 2015 in conjunction with a review of patients' charts to describe clinical and laboratory findings, disposition, and final diagnosis was performed. Patients aged 31 days to 18 years who presented to the ED with suspicion of RPI were included. RESULTS: Review of 366 radiographic reports revealed that 46 were positive for RPI, 286 were negative, and 34 indeterminate. A final discharge diagnosis of RPI was made in 38 patients. Lateral neck radiographs had a sensitivity of 84.3% and a specificity of 93.7% for diagnosing RPI. In triage, most patients had no fever (264, 72.1%), stridor (356, 97%), drooling (348, 95%), or voice change (342, 93%). Surgical intervention occurred in 15 patients (39.5%) with a final diagnosis of RPI. CONCLUSIONS: Lateral neck radiography is useful for diagnosis of RPI in the ED with good sensitivity and specificity. Additional imaging is to be considered at the behest of physician's clinical judgment.

Novel Image Processing Method for Detecting Strep Throat (Streptococcal Pharyngitis) Using Smartphone.

In this paper, we propose a novel strep throat detection method using a smartphone with an add-on gadget. Our smartphone-based strep throat detection method is based on the use of camera and flashlight embedded in a smartphone. The proposed algorithm acquires throat image using a smartphone with a gadget, processes the acquired images using color transformation and color correction algorithms, and finally classifies streptococcal pharyngitis (or strep) throat from healthy throat using machine learning techniques. Our developed gadget was designed to minimize the reflection of light entering the camera sensor. The scope of this paper is confined to binary classification between strep and healthy throats. Specifically, we adopted k-fold validation technique for classification, which finds the best decision boundary from training and validation sets and applies the acquired best decision boundary to the test sets. Experimental results show that our proposed detection method detects strep throats with 93.75% accuracy, 88% specificity, and 87.5% sensitivity on average.

Bilateral vocal cord immobility resulting from cytomegalovirus pharyngitis: A case report.

Human cytomegalovirus (CMV) is an infectious herpes virus present in approximately 50% of the world's population. Pharyngitis is an uncommon manifestation of CMV infection, and vocal cord immobility (VCI) following CMV pharyngitis is quite rare. An 83-year-old man with well-controlled diabetes mellitus and hypertension was admitted due to dyspnea, odynophagia, and dysphagia. Laryngeal fiberscopy revealed bilateral vocal cords almost fixed at the median position, with mucosal redness, swelling, and edema at the hypopharyngeal area. The airway was so narrowed that an emergency tracheostomy was performed to secure an airway. VCI resulting from a malignant tumor was suspected at first, but repeated pathological examinations revealed CMV infection in the pharyngeal mucosa. Despite intravenous ganciclovir treatment (5 mg/kg), the patient's bilateral VCI improved only slightly. Laryngeal electromyography was used to investigate the causes of VCI, and revealed vocal fold paralysis on the left side and cricoarytenoid joint fixation on the right side. This case highlights the importance of considering CMV infection in the differential diagnosis of patients with pharyngitis and VCI. To the best of our knowledge, this is the first case report describing the etiology of VCI following CMV pharyngitis using laryngeal electromyography.

Non-traumatic causes of fluid in the retropharyngeal space.

There are multiple reasons for imaging the soft tissues of the neck in the emergency setting, in particular when symptoms are vague or if there is worry for complications from a certain clinical diagnosis. When fluid is seen in the retropharyngeal space, it is important to pay attention to history and look at key structures in the neck. This article will discuss anatomy of the retropharyngeal space, followed by four causes of fluid within the space that the radiologist is likely to encounter in the emergency setting: tonsillitis/pharyngitis, acute calcific tendinitis of the longus colli muscles, internal jugular vein thrombosis, and post-radiation changes. It is important to recognize these entities because each has different clinical implications and management.

An unusual presentation of a chronic ingested foreign body in an adult.

BACKGROUND: Sore throat is a common complaint for patients presenting to the emergency department (ED). Although most are caused by viral and bacterial sources, an ingested foreign body must be considered in the right patient population. Retained foreign bodies occur in both children and adults. In children, the objects are usually non-food items, whereas adults are more likely to have impacted food boluses. Typically, patients present acutely, and chronic foreign bodies are rare, especially in adults. OBJECTIVE: We use an unusual presentation of a retained foreign body in a previously undiagnosed Zenker diverticulum to review ingested foreign bodies and Zenker diverticuli. CASE REPORT: We report the case of an 82-year-old woman who presented to the ED with a chief complaint of 12 h of worsening pharyngitis and odynophagia. She reported she had a capsule endoscopy performed approximately 4 months earlier during which the device had malfunctioned and no images were transmitted from beyond the esophagus. A soft tissue film of the neck showed the endoscopic capsule retained at the level of the clavicles. Esophagogastroduodenoscopy demonstrated a previously undiagnosed Zenker diverticulum containing the endoscope capsule. This was subsequently removed with laryngoscopy. CONCLUSION: Complaints related to sore throat commonly have a simple explanation. Recurrent symptoms and a physical examination inconsistent with common explanations require the differential to be broadened and less common causes considered.

Laryngopyocoele: an unusual cause of a sore throat.

Laryngopyocoeles are rare entities that present as airway obstruction or as neck masses. We present a unique case of a laryngopyocoele in a young patient with a sore throat. A 22-year-old man presented to the emergency department with a sore throat of 1-week duration. He had no other upper respiratory symptoms. His vitals were as follows: heart rate, 91; respiratory rate, 16; blood pressure, 119/60; and temperature, 36.8 (98.3°F). There were no signs of respiratory distress or airway involvement. The findings from his physical examination were normal except for tenderness on palpation of his larynx. A soft tissue neck x-ray was suggestive of epiglottitis. Fiberoptic laryngoscopy revealed a nonerythematous, edematous epiglottis and edema of the left arytenoid and aryepiglottic fold with slight bulging into the airway. A contrast neck computed tomography revealed a nonenhancing fluid collection at the level of the left arytenoid cartilage. The diagnosis of a laryngopyocoele was made. The patient was admitted to the intensive care unit for airway monitoring and treated conservatively with intravenous antibiotics. The collection did not resolve by day 4, and the patient was taken to the operating room for incision and drainage of the laryngopyocoele. The patient made an uneventful recovery.

[A new approach to the evaluation of the state of the microcirculatory system in patients presenting with chronic atrophic pharyngitis and treated with a synthetic neuropeptide].

This paper is devoted to the mechanisms of development of chronic atrophic pharyngitis. A method is proposed for studying microcirculation in the mucous membrane at the posterior pharyngeal wall of the patients with this condition using laser Doppler flowmetry. The role of chronic somatic pathology in the development of pharyngeal dystrophy is demonstrated. It is shown that therapy with the synthetic neuropeptide is highly efficacious for the treatment of chronic atrophic pharyngitis.

Something's "Fishy" With That Sore Throat...

A 9-year old male presented to the emergency department for the evaluation of a sore throat. Initial history of present illness stated in the triage note was that "the child complained of a sore throat," suggesting possible pharyngitis. There was no evidence of stridor, sialorrhea, hypoxia, or aphonia. Further investigation of the history of present illness identified the concern for a possible esophageal foreign body. Imaging studies of the neck identified a fishbone in the esophagus. This case presentation discusses an atypical presentation of an esophageal foreign body and the subtle findings on assessment and imaging. This case highlights the importance of illiciting a history of present illness and the subtleties of esophageal foreign body identification.

Lemierre syndrome: report of five new cases and literature review.

Lemierre Syndrome (LS) is relatively rare, and its clinical features are potentially confusing. Without proper therapy, LS is associated with significant morbidity and is potentially fatal. Recognition of the imaging features of LS in the chest and the neck may permit a timely diagnosis and lead to prompt institution of appropriate therapy. The emergency imaging features of LS in five cases are reviewed with emphasis on computed tomography of the chest and neck.

[Jugular vein thrombosis and Lemierre's syndrome--severe complications of oropharyngeal infections]. / Jugularvenenthrombose und Lemierre-Syndrom--schwerwiegende Komplikationen oropharyngealer Infekte.

BACKGROUND: Acute oral or pharyngeal infections usually heal under adequate therapy within a few days. Therefore severe regionary or systemic complications are not regularly seen. PATIENTS AND METHODS: We report on 3 patients in whom during or after apparent recovery from a pharyngeal or perioral infection a one-sided painful swelling of the neck associated with fever and leucocytosis developed. RESULTS: Color Doppler sonography (CDS) revealed unilateral thrombosis of the internal jugular vein (IJV) in all cases, whereupon we initiated high-dosed parenteral antibiotic therapy and therapeutic heparinisation. Furthermore, we drained detectable abscess formations. Nonetheless, in one patient fever attacks occurred postoperatively, accompanied by septic-embolic lung infiltrates, corresponding to Lemierre's syndrome. In all cases, we achieved clinical recovery and remission of infection. The course was significantly prolonged in the patient with pulmonary involvement and in this patient no reperfusion of the IJV was achieved. CONCLUSIONS: Even today serious complications may occur unexpectedly in presumed everyday oral or pharyngeal infections. CDS is a suitable procedure to disclose a jugular vein thrombosis (JVT) promptly and non-invasively. Parenteral antibiotic therapy for at least 10 days is usually the therapy of choice for JVT; additional full-heparinisation is controversially discussed in the professional literature. Septic pulmonary embolism following pharyngeal infection and JVT, as described by Lemierre, was associated with a high rate of mortality in the pre-antibiotic era, and even today may be fatal in spite of appropriate and maximal therapy.

Toward automated severe pharyngitis detection with smartphone camera using deep learning networks.

PURPOSE: Severe pharyngitis is frequently associated with inflammations caused by streptococcal pharyngitis, which can cause immune-mediated and post-infectious complications. The recent global pandemic of coronavirus disease (COVID-19) encourages the use of telemedicine for patients with respiratory symptoms. This study, therefore, purposes automated detection of severe pharyngitis using a deep learning framework with self-taken throat images. METHODS: A dataset composed of two classes of 131 throat images with pharyngitis and 208 normal throat images was collected. Before the training classifier, we constructed a cycle consistency generative adversarial network (CycleGAN) to augment the training dataset. The ResNet50, Inception-v3, and MobileNet-v2 architectures were trained with transfer learning and validated using a randomly selected test dataset. The performance of the models was evaluated based on the accuracy and area under the receiver operating characteristic curve (ROC-AUC). RESULTS: The CycleGAN-based synthetic images reflected the pragmatic characteristic features of pharyngitis. Using the synthetic throat images, the deep learning model demonstrated a significant improvement in the accuracy of the pharyngitis diagnosis. ResNet50 with GAN-based augmentation showed the best ROC-AUC of 0.988 for pharyngitis detection in the test dataset. In the 4-fold cross-validation using the ResNet50, the highest detection accuracy and ROC-AUC achieved were 95.3% and 0.992, respectively. CONCLUSION: The deep learning model for smartphone-based pharyngitis screening allows fast identification of severe pharyngitis with a potential of the timely diagnosis of pharyngitis. In the recent pandemic of COVID-19, this framework will help patients with upper respiratory symptoms to improve convenience in diagnosis and reduce transmission.

COVID-19 in cancer patients can be challenging to screen in a resource limited setting.

During this COVID-19 pandemic, patients with symptoms such as fever, cough, sore throat, and coryza were advised to have RT-PCR testing for SARS-CoV-2 infection. We described here an elderly female with chronic lymphocytic leukemia, who presented with atypical symptoms that were not directly attributable to COVID-19. This patient was admitted to the non-COVID-19 ward for supportive care. Later, her chest x-ray revealed pneumonia that was confirmed to be COVID-19 by RT-PCR testing several days later. In resource-poor settings where molecular testing results suffered from delays or were altogether unavailable, the use of diagnostic imaging such as a chest x-ray could serve as a quick guide in the assessment and management of these patients especially if the imaging results suggest COVID-19 infection.

Pharyngitis of infectious mononucleosis: computed tomography findings.

Two women presented with sore throat and fever. Their symptoms were not alleviated by antibiotics. Cervical computed tomography (CT) with contrast enhancement demonstrated enlargement of predominant posterior cervical lymph nodes and streaky heterogeneous tonsils with interspersed low attenuation. They were diagnosed as having infectious mononucleosis by their laboratory data. Thus, when radiologists encounter these CT findings of pharyngitis that is not alleviated by antibiotic therapy, infectious mononucleosis should be considered in the differential diagnosis.

Prodromal symptoms predict myocardial involvement in patients with acute idiopathic pericarditis.

BACKGROUND: Myocardial involvement is common in acute idiopathic pericarditis and can, in some cases, lead to life-threatening complications. Acute idiopathic pericarditis is often preceded by various prodromal symptoms, but whether these symptoms can predict myocardial involvement is unclear. The aim of the study was to examine the value of different prodromal symptoms of acute idiopathic pericarditis for predicting myocardial involvement. METHODS AND RESULTS: Patients diagnosed with acute idiopathic pericarditis in 2007-2017 at our hospital were identified by database search. Demographic parameters, levels of plasma cardiac troponin and creatine kinase, and findings on echocardiography, magnetic resonance imaging, cardiac computed tomography and coronary angiography and data on prodromal symptoms were extracted from the medical files. The final cohort included 239 patients (73.2% males) aged 18-89 years. The most common prodromal symptoms were fever, chills, cough, sore throat, abdominal pain, and diarrhea. Myocardial involvement was observed in 83 patients (34.7%), leading to cardiogenic shock in 4 (4.8%). Patients with myocardial involvement more often had prodromal diarrhea, fever, sore throat, vomiting, atypical chest pain, and pharyngitis. On multivariate analysis, diarrhea, sore throat and fever were strong independent predictors of myocardial involvement (OR, 14.257, 95% CI, 3.920-51.782, p < 0.001, OR, 9.6, 95% CI, 2.934-31.982, p < 0.001 and OR, 2.445, 95% CI, 1.077-5.550, p = 0.025). Diarrhea was associated with left ventricular dysfunction as well. CONCLUSIONS: In acute idiopathic pericarditis, prodromal diarrhea, sore throat and fever strongly predict myocardial involvement, resulting in life-threatening hemodynamic compromise in a minority of the patients.

Photodynamic therapy with chlorin-based photosensitizer at 405 nm: numerical, morphological, and clinical study.

Employment of chlorin-based photosensitizers (PSs) provides additional advantages to photodynamic therapy (PDT) due to absorption peak around 405 nm allowing for superficial impact and efficient antimicrobial therapy. We report on the morphological and clinical study of the efficiency of PDT at 405 nm employing chlorin-based PS. Numerical studies demonstrated difference in the distribution of absorbed dose at 405 nm in comparison with traditionally employed wavelength of 660 nm and difference in the in-depth absorbed dose distribution for skin and mucous tissues. Morphological study was performed at the inner surface of rabbit ear with histological examinations at different periods after PDT procedure. Animal study revealed tissue reaction to PDT consisting in edema manifested most in 3 days after the procedure and neoangiogenesis. OCT diagnostics was confirmed by histological examination. Clinical study included antimicrobial PDT of pharynx chronic inflammatory diseases. It revealed no side effects or complications of the PDT procedure. Pharyngoscopy indicated reduction of inflammatory manifestations, and, in particular cases, hypervascularization was observed. Morphological changes were also detected in the course of monitoring, which are in agreement with pharyngoscopy results. Microbiologic study after PDT revealed no pathogenic bacteria; however, in particular cases, saprophytic flora was detected.