#rheumatology

• Abarticular — A medical term used to describe structures, inflammatory processes, or symptoms located outside a joint, but in its immediate vicinity (tendons, ligaments, bursa). Abarticular rheumatism (such as tendinitis or bursitis) manifests as periarticular pain without affecting the cartilage or internal synovial membrane of the joint itself.
• Acrosclerosis — An indurative pathological process or condition characterized by the sclerosis, thickening, and hardening of the connective tissue and skin at the distal extremities of the limbs (digits, hands) and the face, appearing as a major manifestation within limited systemic scleroderma. The term is often used interchangeably with acroscleroderma, structurally highlighting the dense fibrosis and tightening of periarticular and dermal collagen.
• Acrostealgia — A pathological clinical syndrome characterized by severe pain sensations localized strictly within the distal bony extremities of the body, particularly in the phalanges of the fingers and toes. This osteoarticular structural manifestation is driven by periosteal inflammatory processes, peripheral microvascular ischemic disorders, or advanced local neuro-trophic phenomena, often worsening upon exposure to cold temperatures or during fine movements.
• Algometer — An apparatus, device, or medical instrument used in neurology, rheumatology, and experimental physiology to accurately measure a patient's pain sensitivity or tolerance threshold. The device operates by applying calibrated mechanical, thermal, or electrical stimuli onto a specific area of the body.
• Algoneurosis — A complex neurovegetative and rheumatological condition characterized by chronic and severe pain, local edema, progressive joint stiffness, and severe trophic or vasomotor disturbances of the limb extremities; algodystrophy. The illness is frequently triggered by trauma or fractures.
• Ankylopoiesis — A progressive pathological process of formation, development, or induction of ankylosis within a joint; the biological mechanism through which synovial tissue and articular cartilage are gradually replaced by fibrous or bony tissue, leading to complete immobilization and stiffening of the affected joint structures.
• Ankylosis — A marked diminution or complete loss of mobility in a joint, occurring due to an intracapsular bony or fibrous fusion, caused by chronic inflammatory processes (rheumatism, arthritis), infections, severe trauma, or prolonged immobilization in bed or a plaster cast.
• Ankylosing — Causing, promoting, or accompanying ankylosis; causing progressive stiffening and permanent immobilization of the joints through fibrous or bony fusion. It is commonly used to describe severe forms of chronic autoimmune arthritis affecting the axial skeleton.
• Antirheumatic — Preventing, combating, mitigating, or treating rheumatism; a medication or active substance prescribed to reduce joint or muscular pain, stiffness, and inflammation. In modern clinical practice, the term gathers a wide range of therapeutic pharmaceutical preparations, ranging from classical nonsteroidal anti-inflammatory drugs and corticosteroids to genetically modified biological agents that slow down connective tissue degradation.
• Apatitosis — A rare pathological condition characterized by the abnormal deposition and excessive accumulation of apatite crystals (calcium phosphate) within the body's soft tissues, particularly inside tendons, joints, or muscles. This structural metabolic disorder causes painful chronic inflammation and severe localized calcifications, restricting locomotor mobility.
• Aponeurositis — A painful inflammatory or degenerative condition of an aponeurosis, caused by excessive mechanical stress, repetitive microtraumas, or postural disorders; synonymous with aponeurositis. It frequently manifests on the sole of the foot as plantar aponeurozitis (plantar fasciitis), causing acute pain during walking and localized stiffness.
• Arthralgic — Relating to arthralgia, regarding joint pain; characterized by painful sensations localized within one or more joints without visible external structural inflammatory changes. The term describes specific clinical manifestations or syndromes appearing as symptoms in rheumatological, infectious, or traumatic disorders.
• Arthralgia — Pain localized within one or more joints, possessing various causes (traumatic, infectious, immune, or degenerative), manifested without structural inflammatory changes directly visible from the exterior. In clinical practice, it represents a fundamental symptom requiring paraclinical investigations to differentiate it from an actual arthritis.
• Arthrocentesis — An invasive medical procedure consisting of puncturing a joint cavity using a sterile needle, performed for diagnostic purposes (to extract and analyze synovial fluid) or therapeutic purposes (to evacuate a fluid effusion or inject medications). It is a fundamental technique in rheumatology and orthopedics for the rapid evaluation of septic or microcrystalline arthritis.
• Arthrodynia — A sensation of pain localized within a joint, manifesting without the presence of obvious structural changes, visible lesions, or acute inflammatory signs detectable during an objective clinical examination. This symptom is frequently encountered in the early stages of rheumatic diseases, chronic fatigue states, or as a secondary manifestation within systemic viral infections.
• Arthrogenic — Originating in the joints; generated or caused by a disease or dysfunction of the articular structures. Broadly, the term describes a symptom, pain, or locomotor dynamic disorder whose primary causes reside exclusively within the elements of the synovial capsule, cartilage, or stabilizing ligaments directly associated with the bone joint.
• Arthrology — A branch of anatomy and medicine dealing with the study of the structure, functions, development, and pathology of joints in human and animal bodies. This discipline analyzes all connecting elements between skeletal segments, including cartilage, synovial capsules, ligaments, and lubricating fluids, providing the theoretical foundation for orthopedics, rheumatology, and physical therapy.
• Arthromalacia — A degenerative pathological process characterized by the abnormal softening and loss of firm consistency of the articular cartilage or subchondral bone structures within a joint. This structural weakening, typically caused by metabolic disorders, chronic nutritional deficiencies, or persistent inflammation, reduces the joint's shock-absorbing capacity, leading to progressive deformities and severe pain.
• Arthropathy — A generic term used to designate any disease, suffering, or organic or functional condition that localizes within and affects a joint, regardless of its underlying cause. This extensive medical category includes destructive degenerative processes (such as arthrosis), inflammatory conditions (arthritis), or secondary joint disorders driven by systemic illnesses like diabetes or psoriasis.
• Arthroplasia — The formation, proliferation, or excessive development of new tissue, cells, or atypical fibrous structures inside the capsule of a movable joint. This localized hyperplastic or dysplastic process disrupts the normal composition of the synovial membrane and cartilage, often associated with faulty tissue remodeling reactions following chronic destructive inflammation or repetitive aberrant mechanical stimuli.