Related Experiment Video
Updated: May 24, 2026

Detection of Anti-MDA5 Autoantibodies Using HeLa Cells and Immunocytochemistry with Light Microscopy
Published on: October 31, 2025
Non-hodgkin lymphoma mimicking polymyalgia rheumatica in a young patient
Juma Al-Kaabi1, Saeed Ahmed, Azhar Rizvi
1Department of Medicine, Sultan Qaboos University Hospital, Al Khod, Sultanate of Oman.
Abstract:
Congenital nasal pyriform aperture stenosis (CNPAS) is a recently defined clinical entity that causes airway obstruction in the neonate as a result of narrowing of the nasal pyriform aperture. The pyriform aperture is the narrowest, most anterior portion of the nasal airway, and a slight decrease in its cross sectional area will significantly increase the nasal airway resistance. This entity should be kept in the differential diagnosis of any neonate or infant with signs and symptoms of upper air way obstruction. The CNPAS presents with symptoms of nasal airway obstruction, which are often characterized by episodic apnea and cyclic cynosis.
Related Concept Videos
Myocarditis II: Clinical Features and Diagnostic Tests
Atypical Pneumonia
Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies
Myasthenia Gravis: Diagnostic Tests
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
Myasthenia Gravis ll: Pathophysiology
Myocarditis III: Medical Management