title: Sources of anterior knee pain.
abstract: The anterior part of the knee consists mainly of structures belonging to the patellofemoral joint, which includes a variety of tissues, such as cartilage, subchondral bone, synovial plicae, infrapatellar fat pad, retinacula, capsule, and tendons. Each of these structures, alone or in combination, can be a source of anterior knee pain. Unphysiologic load or changed metabolic activities can lead to structural failure with loss of homeostatic conditions.
mesh_terms: D000273:Adipose Tissue / Q000473:pathology; D002358:Cartilage, Articular / Q000473:pathology; D006801:Humans; D007719:Knee Joint / Q000294:innervation* / Q000473:pathology*; D007867:Leg Bones / Q000473:pathology; D009411:Nerve Endings / Q000033:anatomy & histology / Q000502:physiology; D009412:Nerve Fibers / Q000473:pathology; D010146:Pain / Q000209:etiology* / Q000473:pathology* / Q000503:physiopathology; D013373:Substance P / Q000502:physiology; D013583:Synovial Membrane / Q000294:innervation / Q000473:pathology
chemical_list: D013373:Substance P