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Case of the Week 402 
What is the most likely diagnosis?
- 43 year-old mild shortness of breath
Axial non-enhanced CT Images of the Lower Chest
- Silicosis
- Sarcoidosis
- Smoke inhalation
- Lipoid pneumonia
- Pulmonary alveolar microlithiasis
Additional Images - Frontal chest radiograph
Additional Images
Frontal chest radiograph
Answer:
.
5. Pulmonary Alveolar Microlithiasis
.
.
More (Click Discussion Tab)
Pulmonary Alveolar Microlithiasis
General Considerations
- Very rare, chronic disease characterized by widespread calcifications called "calcispherites" within the alveoli
- Etiology is unknown but it has a familial incidence with an autosomal recessive inheritance pattern
- No known calcium metabolism disorder
- Microliths range from 0.01 to 3 mm in size and are composed of calcium phosphate
.
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43 year-old with mild shortness of breath |
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is an award-winning educational website aimed primarily at medical students and radiology residents-in-training, containing lectures, handouts, images, Cases of the Week, archives of cases, quizzes, flashcards of differential diagnoses and “most commons” lists, primarily in the areas of chest, GI, GU cardiac, bone and neuroradiology. |
