
Rigler notch sign
Rigler notch sign: Indentation in the border of a solid lung mass (thought to represent a feeding vessel) suggestive of a bronchial carcinoma

Rigler notch sign: Indentation in the border of a solid lung mass (thought to represent a feeding vessel) suggestive of a bronchial carcinoma

Rigler triad; Imaging findings in patients with gallstone ileus with an ectopic gallstone causing small bowel obstruction, and pneumobilia
Epidemiology Aetiology & Pathophysiology Key Imaging Features (Rigler’s Triad) Sensitivity increases when all three features are present; however, only 14–53% of cases demonstrate the full triad on plain films . History of the gallstone ileus 1654 – The first case…

Radiological signs of pneumoperitoneum: history, diagnosis, and key eponyms including Rigler’s sign, Popper’s sign, football sign, and inverted V sign

Leo George Rigler (1896-1979) was an American radiologist. Eponymously affiliated with Rigler sign; Rigler triad; Rigler notch sign; Hoffman-Rigler sign

John Brereton Barlow (1924-2008) was a South African cardiologist. Barlow described mitral valve prolapse (eponymously known as Barlow’s syndrome) in 1963

Herman Snellen (1834–1908): Dutch ophthalmologist who created the Snellen chart and standardized visual acuity testing, transforming eye care worldwide

Biography Medical Eponyms Hudson Mask Patented in 1958 by Charles H. Hudson (US Patent No. 2,843,121), the “Hudson mask” became the archetype of the disposable oxygen face mask Designed for low-flow oxygen therapy (5–10 L/min), delivering approximately 35–60% FiO₂. Constructed from…
Necrotizing fasciitis: life-threatening soft tissue infection, historically hospital gangrene, term coined by Ben J. Wilson in 1951

Joseph Jones (1833–1896), Confederate surgeon who defined hospital gangrene, advanced malaria research, and shaped Southern public health

Charles Foix (1882–1927), French neurologist; defined brainstem vascular syndromes, Foix–Alajouanine syndrome, and helped shape modern cerebrovascular neurology.

Bamberger–Marie syndrome (hypertrophic pulmonary osteoarthropathy): clubbing, bone periostosis, and joint effusions—historically recognised as a paraneoplastic syndrome linked to lung disease.