Two endoscopic images (a and b) documenting the clinical presentation of the pharynx and larynx in a patient with suspected infectious mononucleosis. Image (a) is an oropharyngeal view showing bilateral, grade II Mackenzie classification tonsillar swelling. There is notable erythema of the soft palate and localized yellow-white exudate (pus) on the tonsillar surfaces (indicated by yellow arrows), without confluent pseudomembranes. Image (b) provides a laryngeal endoscopic view looking down toward the glottis. It reveals significant edema and swelling of the lingual tonsils and posterior third of the tongue (yellow arrows). Anatomical landmarks including the epiglottis and vocal folds are visible; notably, there is an absence of laryngeal or epiglottic edema that would suggest airway compromise. These visual findings are characteristic of viral pharyngotonsillitis, often seen in Epstein-Barr virus (EBV) infections, and are used to differentiate from bacterial streptococcal pharyngitis or more severe supraglottic infections.

This clinical photograph provides an intraoral view of the oropharynx, demonstrating classic signs of exudative tonsillitis and pharyngitis. The palatine tonsils are bilaterally enlarged (tonsillar hypertrophy) and erythematous, featuring prominent white-to-yellowish confluent exudates on the mucosal surface. The surrounding tissues, including the posterior pharyngeal wall and soft palate, exhibit significant hyperemia. Notably, the uvula is markedly edematous and erythematous (uvulitis). These visual findings are highly characteristic of infectious mononucleosis caused by the Epstein-Barr virus (EBV), particularly in young adult populations. The image serves as an educational reference for distinguishing between simple viral pharyngitis and more severe exudative presentations that involve widespread oropharyngeal inflammation, lymphoid hyperplasia, and constitutional symptoms like cervical lymphadenopathy and fatigue.

This composite diagnostic image features four panels of contrast-enhanced computed tomography (CT) scans illustrating clinical manifestations of infectious mononucleosis (Epstein-Barr virus). Panel A shows a transverse view of the oropharynx, identifying bilateral tonsillar thickening and edema (red asterisks) alongside a thickened, edematous uvula (yellow asterisk). Panel B presents a coronal view of the neck, highlighting prominent, reactive cervical lymphadenopathy. Panels C and D are transverse sections of the thorax at the level of the heart, demonstrating a trace pericardial effusion. Yellow arrows point to abnormal enhancement and thickening of the pericardial sac, indicating inflammatory pericarditis. The collection serves as an educational resource for identifying multisystem involvement of EBV, ranging from exudative pharyngitis and regional lymphadenopathy to secondary cardiac complications such as pericarditis. This material is suitable for medical education in radiology, infectious disease, and emergency medicine specialties.