Sarcoidosis vs Berylliosis / histoplasmosis
How to tell Sarcoidosis and Berylliosis / histoplasmosis apart when a board question makes them look alike.
Sarcoidosis is a diagnosis of compatible multisystem granulomas after excluding beryllium exposure and fungal infection.
Side by side
Multisystem noncaseating granulomatous disease with bilateral hilar lymphadenopathy, uveitis, erythema nodosum, hypercalcemia, and no better exposure or infectious cause.
Berylliosis is sarcoid-like granulomatous disease after beryllium exposure; histoplasmosis is fungal granulomatous infection tied to bird or bat droppings in endemic areas.
Immune dysregulation produces noncaseating granulomas in lung, lymph nodes, skin, eyes, and other organs.
Beryllium sensitization drives occupational granulomas; Histoplasma infection produces granulomatous host response to inhaled fungal organisms.
Bilateral hilar adenopathy plus noncaseating granulomas, hypercalcemia, ocular/skin disease, and exclusion of infection/exposure points sarcoidosis.
Aerospace or metalwork beryllium exposure and positive beryllium sensitization testing points berylliosis; bat/bird droppings and fungal testing points histoplasmosis.
The trap
Noncaseating granulomas are not automatically sarcoidosis; occupational and endemic infection clues can override it.
Watch it explained
The repair move
For granulomatous lung disease, ask exposure first: beryllium, bird/bat droppings, then sarcoid pattern.
Try a free question
CoreA patient has bilateral hilar lymphadenopathy, noncaseating granulomas, erythema nodosum, uveitis, and hypercalcemia without a known occupational exposure. Which diagnosis is most likely?
Show answer and explanation
Answer: A. Sarcoidosis. Sarcoidosis is a multisystem noncaseating granulomatous disease, often with hilar adenopathy, eye/skin findings, and hypercalcemia.
Why the other choices are tempting
- B. Berylliosis can mimic sarcoidosis but requires beryllium exposure and sensitization evidence.
- C. Histoplasmosis is a fungal infection tied to bird/bat droppings and often has caseating or infectious granulomatous features.
- D. Silicosis is occupational pneumoconiosis with upper-lobe nodules and egg-shell calcification.
- E. IPF is fibrotic interstitial disease without granulomas.
Flashcards
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What is the fastest separator for Sarcoidosis vs Berylliosis / histoplasmosis?
Sarcoidosis is a diagnosis of compatible multisystem granulomas after excluding beryllium exposure and fungal infection.
What clue should make you choose Sarcoidosis?
Multisystem noncaseating granulomatous disease with bilateral hilar lymphadenopathy, uveitis, erythema nodosum, hypercalcemia, and no better exposure or infectious cause.
Quick answers
What is the fastest way to tell Sarcoidosis from Berylliosis / histoplasmosis?
Sarcoidosis is a diagnosis of compatible multisystem granulomas after excluding beryllium exposure and fungal infection.
What is the key clue for Sarcoidosis?
Multisystem noncaseating granulomatous disease with bilateral hilar lymphadenopathy, uveitis, erythema nodosum, hypercalcemia, and no better exposure or infectious cause.
What is the key clue for Berylliosis / histoplasmosis?
Berylliosis is sarcoid-like granulomatous disease after beryllium exposure; histoplasmosis is fungal granulomatous infection tied to bird or bat droppings in endemic areas.
What is the common trap with Sarcoidosis vs Berylliosis / histoplasmosis?
Noncaseating granulomas are not automatically sarcoidosis; occupational and endemic infection clues can override it.