#cartilage

• Alae — The plural form of the feminine noun 'ala'; in ancient Roman military history, it designates multiple auxiliary cavalry or infantry units placed on the army's flanks; in anatomy and zoology, it represents the prominent symmetrical wings or structural formations of certain bones, organs, or insects (such as alae sacrales or the nasal wings). This structural term of morphological precision describes paired lateral elements that ensure aerodynamic balance, skeletal stability, or mechanical protection of an anatomical opening.
• Amiantoid — Resembling amiantus; a term used in mineralogy to describe crystalline formations with a fibrous and silky appearance. In medical histology, it describes a rare form of cartilage degeneration (amiantoid degeneration), characterized by the appearance of dense bundles of thick collagen fibers that mimic the structure of asbestos.
• Antehelix — A curved prominence of the external ear pinna, situated in front of and parallel to the helix, separated from it by the scaphoid fossa. This cartilaginous structure bifurcates in its upper part into two flexible crura that frame the triangular fossa, playing an essential role in capturing, reflecting, and guiding sound waves toward the external auditory canal.
• Antitragus — A small, cartilaginous prominence located on the pinna of the external ear (auricle), situated symmetrically at the lower part of the antihelix and placed directly opposite the tragus, from which it is separated by the intertragic notch. This fine anatomical structure plays a decorative and functional role in helping direct sound waves into the external auditory canal and also represents a common landmark in modern piercing procedures.
• Arytenoid — Each of the two small, paired, pyramid-shaped cartilages situated at the posterior part of the larynx, above the cricoid cartilage. As an adjective, it describes any structure (muscle, ligament, mucosa) associated with these cartilages. They play an absolutely critical physiological role in phonation and respiration by directly controlling the tension, position, opening, and closing of the vocal cords.
• Arytenoidectomy — A high-precision surgical intervention consisting of the partial or total excision of one or both arytenoid cartilages of the larynx. This structural surgical procedure is primarily performed to treat bilateral vocal cord paralysis in abduction (median position), aiming to widen the restricted glottic space and alleviate severe respiratory insufficiency, thereby restoring a functional airway without completely compromising phonation.
• Arytenoiditis — An acute or chronic inflammatory process localized within one or both arytenoid cartilages or the mucosa covering them in the posterior region of the larynx. This structural condition, often infectious, traumatic, or induced by severe gastroesophageal reflux, manifests clinically through dysphonia (hoarseness), odynophagia (painful swallowing), and an annoying foreign body sensation in the throat.
• Articular — Pertaining to or characteristic of a joint; structurally located at the junction of two or more bones. In a clinical sense, it describes anatomical elements, pathological modifications, or inflammatory and degenerative processes localized within the capsules, cartilages, or ligaments of the locomotor system.
• Arthrophyte — A loose fragment of bone, cartilage, or synovial tissue detached within the cavity of a movable joint, acting as an intra-articular foreign body. Commonly referred to as a 'joint mouse', it typically originates from trauma, advanced degenerative processes, or osteochondritis dissecans, causing sharp pain, inflammation, and sudden locking of movement.
• Arthrography — A method of radiological or imaging examination of a joint, performed by previously injecting a contrast medium directly into the joint cavity. This procedure allows detailed visualization of radiolucent anatomical structures, such as cartilage, menisci, labrum, or internal ligaments, which cannot be precisely observed on a standard non-contrast X-ray.
• 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.
• 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.
• Arthrosis — A chronic degenerative joint disease characterized by the progressive degradation and gradual destruction of the protective cartilage covering bone ends, accompanied by modifications of the subchondral bone and the formation of marginal bone growths called osteophytes. This pathology, closely linked to natural aging, repeated trauma, or excessive mechanical stress, causes persistent pain, nocturnal joint stiffness, and severe reduction of functional mobility.