#androgen

• Alopecia — The partial or total loss of hair from the scalp or other regions of the body, caused by genetic factors, endocrine imbalances, autoimmune diseases, systemic stress, or aggressive medical treatments. This structural pathological phenomenon affects the natural growth cycle of hair follicles, leading to their miniaturization or destruction, and is classified into cicatricial (irreversible) and non-cicatricial forms.
• Anandria — A rare medical and biological term designating the complete absence or severe deficiency of masculine characteristics or androgen hormones (testosterone) in a male individual. In clinical pathology, this structural or functional condition can be caused by genetic anomalies, testicular dysfunctions, or severe disorders of the hypothalamus-pituitary axis, leading to the non-development of secondary sexual characteristics and the appearance of eunuchoid physical traits.
• Androblastoma — A rare androgen-secreting tumor located in the ovary (also known as a Sertoli-Leydig cell tumor) or testis, developing from the embryonic structures of primitive sex cords. Structurally, this neoplastic proliferation frequently induces clinical phenomena of virilization and secondary masculinization in female patients, requiring precise histopathological diagnosis and surgical excision.
• Androphen — A specialized term used in developmental genetics and phenotypic studies to designate a clearly masculinized morphological, physiological, or behavioral pattern, structurally determined by the interaction between sex-specific genes and androgen hormones.
• Androgalactosemia — An extremely rare hereditary metabolic condition manifested exclusively in male patients, characterized by the organism's structural inability to correctly metabolize galactose due to a specific enzyme deficiency linked to the X chromosome or influenced by androgen hormones, leading to toxic compounds accumulation.
• Androgamy — A specialized type of reproduction or fertilization (found in rare cases in certain plants, insects, or genetically modified organisms) where the zygote nucleus develops exclusively from the genetic material provided by the male gamete, while the female genetic material is structurally eliminated or inactivated.
• Androgen — A natural or synthetic hormonal substance (such as testosterone) that stimulates and controls the development and maintenance of male secondary sexual characteristics in vertebrates. As an adjective, it describes any factor, chemical compound, or structural physiological process that induces masculinization or exerts a direct influence on the male reproductive organs.
• Androgenetic — Determined or jointly influenced by the action of androgen hormones and hereditary (genetic) factors. In a dermatological and structural context, the term most frequently describes androgenetic alopecia (male or female pattern baldness), a condition characterized by the progressive hair follicle miniaturization under the influence of dihydrotestosterone in genetically predisposed individuals.
• Androgeny — A specialized scientific term designating the presence, development, or manifestation of masculine physical and constitutional characteristics in an individual, regardless of their biological sex. In a rare sociological or anthropological context, the concept describes the state of structural dominance of masculine elements or androgenic hormonal influences in the phenotypic evolution of a population.
• Androgen therapy — A medical treatment method consisting of the therapeutic administration of androgen hormones or masculinizing compounds (such as testosterone or its derivatives). This clinical protocol is structurally used in endocrinology for correcting male hypogonadism, in gender-affirming therapies, and in managing certain oncological conditions or severe cachexia states.
• Andromimetic — Pertaining to factors, chemical compounds, behaviors, or psychological states that mimic, copy, or structurally reproduce male physical characteristics, hormonal manifestations, or behavioral patterns. In a rare clinical or pharmacological context, it describes non-steroidal substances that trigger physiological reactions similar to those produced by natural androgen hormones.
• Andropathy — A general or rare medical term used to designate any disease, organic disorder, or pathology exclusively affecting the male reproductive and urogenital system or determined by severe imbalances of male androgen hormones.
• Androsterone — A natural steroid hormone with weak androgenic activity, structurally produced during testosterone metabolism in the liver or secreted directly by the adrenal cortex and testes. This biochemical compound, historically isolated for the first time by Adolf Butenandt, acts as a chemical messenger and an essential metabolic precursor, being excreted in urine and used as a marker for overall male hormone production.
• Anaphrodisiac — A chemical substance, food, medication, or psychological factor capable of diminishing, inhibiting, or suppressing sexual desire (libido). In clinical pharmacology, they act by reducing androgen levels or altering central neurotransmitters.
• Arenoma — A benign or malignant tumor formation located within the adrenal cortex, structurally capable of secreting excess androgenic hormones; a virilizing adenoma or carcinoma. This neoplasm causes severe endocrine disorders clinically manifested through virilization syndrome, pronounced hirsutism, and secondary alterations of secondary sexual characteristics.