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Conceptual illustration of pediatric meningitis diagnosis. A child's brain, side view, shows characteristic surface inflammation. The silhouette provides a background for bacteria floating below. A lumbar cerebrospinal fluid (CSF) tap shows a needle inserted into the spinal canal. Arrows indicate fluid withdrawal used for diagnostic testing.
Close-up of a generic cochlear implant electrode inserted into the coils of the cochlea, sectioned to show the electrode and the cochlear nerve distribution. Also shown are the eardrum, malleus, incus, and stapes, which conduct sound across the middle ear (lower left). The bony labyrinth cavity structures of the inner ear are represented as solid.
Illustration of deep vein thrombosis (DVT): a posterior knee joint with the popliteal vein shown open to reveal a large venous thrombus (blood clot). DVT occurs commonly in the lower leg. When the vein becomes clogged with a thrombus, the veins feeding into it become distended and tortuous.
Chronic obstructive pulmonary disease (COPD) anatomy and pathology: a dilated terminal bronchiole (foreground); the sectioned surface of the left lung with characteristic pitting (center); and a sectioned bronchial tube with characteristic pathology (background). COPD, which includes emphysema and chronic bronchitis, is often linked to smoking.