bloodfilled

Blood-filled is an adjective used in biology and medicine to describe tissues, spaces, or lesions that contain blood. This can reflect normal physiological contents, such as vascular channels filled with circulating blood, or abnormal accumulation due to rupture, leakage, or hemorrhage.

In pathology, the term is commonly applied to hematomas (localized blood collections outside vessels), blood-filled cysts, or vascular malformations in which pools of blood accumulate. A blood-filled aneurysm refers to an outpouching that is filled with blood; a blood-filled sinus or cavity may occur in organs where venous structures become engorged or structurally altered. The description emphasizes the presence of blood within a structure rather than normal tissue content.

Imaging and diagnosis rely on the stage of the bleed. Acute blood often has characteristic appearances on computed tomography or magnetic resonance imaging that change as blood degrades over time. The underlying causes of blood-filled states include trauma, surgical procedures, coagulopathies, inflammatory processes, or congenital vascular anomalies. Clinically, identifying a blood-filled lesion prompts assessment of the source of bleeding, the risk of expansion or infection, and, when appropriate, decision-making about observation versus intervention.

See also: hemorrhage, hematoma, bleeding, vascular malformation.