infarctpale

Infarctpale is a term used to describe pale infarcts, a form of tissue infarction that presents as a pale area due to coagulative necrosis following occlusion of an end-arterial blood supply in solid organs. The descriptor is most often associated with organs that rely on a single arterial supply, such as the heart, kidney, and spleen, where interruption of flow produces a well-demarcated, pale lesion. In contrast, red infarcts occur more frequently in tissues with dual blood supply or venous occlusion, or in loose tissues.

Pathophysiology and morphology: An arterial thrombus or embolus blocks a branch of an artery, leading to ischemia and subsequent coagulative necrosis. Grossly, pale infarcts are typically wedge-shaped with the apex toward the occluded vessel and a pale, nonhemorrhagic appearance. Histologically, early stages show preservation of basic tissue architecture with cell necrosis and later infiltrates of inflammatory cells as injury evolves.

Clinical relevance: Pale infarcts are seen in various clinical settings, such as myocardial, renal, or splenic ischemia from thrombosis or embolism, often in the context of atherosclerotic disease or portal/arterial occlusion. They illustrate irreversible tissue injury if perfusion is not restored in time.

Terminology: The term infarctpale is a less common variant referring to the well-known concept of pale infarct. Most contemporary literature uses “pale infarct” as a two-word term. See also infarction, ischemia, and coagulative necrosis.