#anulo

• Actinobacillosis — A chronic, structural infectious disease primarily affecting animals (especially cattle and swine) and extremely rarely humans, caused by bacteria of the genus Actinobacillus (such as Actinobacillus lignieresii). The disease is clinically characterized by the development of abscesses and hard granulomatous nodules in soft tissues, frequently localized in the tongue (commonly known as 'wooden tongue'), lymph nodes, or respiratory tract, causing major difficulties in mastication and deglutition.
• Agranulocyte — A type of leukocyte (white blood cell) characterized by the absence of specific granules in its cytoplasm and a non-lobed nucleus; agranulocytes include lymphocytes and monocytes, playing a vital role in adaptive immunity.
• Agranulocytic — Relating to agranulocytes or agranulocytosis; describing cellular phenomena, immune reactions, or clinical syndromes associated with white blood cells that lack specific cytoplasmic granules or with conditions marked by a severe depletion of granulocytes.
• Agranulocytosis — An acute and severe hematological condition characterized by a drastic reduction or near-complete disappearance of granulocytes (primarily neutrophils) in the peripheral blood, dropping below 500 per microliter. It leaves the body highly vulnerable to life-threatening infections.
• Aleukocytosis — A rare pathological condition characterized by the total absence or extreme, critical, and potentially fatal decrease of leukocytes (white blood cells) in the peripheral blood. It represents a severe manifestation of bone marrow aplasia or major hematopoietic disorders, exposing the organism to an imminent risk of massive opportunistic infections due to the complete collapse of the immune system.
• Amidopyrine — A medicinal compound from the pyrazolone class, historically used as a potent analgesic, antipyretic, and anti-inflammatory agent, chemically known as aminophenazone. Although it possesses high structural efficiency in combating fever and acute pain, its modern clinical use has been severely restricted or banned in most countries due to the documented risk of inducing severe agranulocytosis and the formation of carcinogenic nitrosamines in the stomach.
• Aminophenazone — An organic compound of the pyrazolone class, historically widely used as a drug with potent analgesic, antipyretic, and anti-inflammatory properties (also known as pyramidon). Due to its major structural risk of causing severe agranulocytosis and its carcinogenic potential through the formation of nitrosamines, its clinical use has been banned or severely restricted in modern medicine.
• Angiolupoid — A rare clinical form of cutaneous sarcoidosis (structurally known as Brocq-Pautrier angiolupoid), characterized by the appearance of well-defined, infiltrated plaques or nodules, reddish-purple or brown in color, typically localized on the nasal pyramid or the inner canthus of the eye. Histologically, this lesion is distinguished by the association of a typical sarcoid (tuberculoid) granulomatous infiltrate with an intense component of neoangiogenesis and pronounced capillary vascular ectasias.
• Annulo- — A combining form derived from Latin (anulus), used in scientific, anatomical, or botanical terminology to indicate a ring shape, a circular structure, or a ring-like arrangement of tissues or organs.
• Annulocyte — A pathological red blood cell (erythrocyte) with a ring-like appearance, characterized by an extremely pronounced central pallor and a reduced concentration of hemoglobin restricted to the periphery of the cell membrane; it serves as a specific diagnostic indicator for severe iron-deficiency anemias or thalassemias.
• Annuloid — Resembling a ring or a torus in shape, without strictly fulfilling their perfect geometric criteria; (noun) a three-dimensional surface or body generated by rotating a closed curve around an axis located in the same plane, used in designing circular mechanical components.
• Annuloplasty — A high-precision surgical intervention performed on the heart, consisting of repairing, remodeling, or narrowing the fibrous ring (annulus) of a human cardiac valve (most commonly the mitral or tricuspid valve) through the insertion of a synthetic artificial ring, aimed at correcting blood regurgitation and restoring normal hemodynamic function.