| AFP | alpha-fetoprotein; anterior faucial pillar; atypical facial pain |
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| AH | abdominal hysterectomy; absorptive hypercalciuria; accidental hypothermia; acetohexamide; acid hydro... |
| AHA | acetohydroxamic acid; acquired hemolytic anemia; acute hemolytic anemia; American Heart Association;... |
| AHPO | anterior hypothalamic preoptic [area] |
| AIIS | anterior inferior iliac spine |
| anterior lingual gland | One of the small mixed glands deeply placed near the apex of the tongue on each side of the frenulum. Synonym: glandula lingualis anterior, apical gland, Bauhin's gland, Blandin's gland, Nuhn's gland. (05 Mar 2000) |
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| anterior lip of uterine os | The portion of the vaginal part of the uterine cervix that bounds the ostium anteriorly intervening between the ostium and the anterior vaginal fornix. It is slightly shorter than labium posterius. Synonym: labium anterius ostii uteri. (05 Mar 2000) |
| anterior lobe of hypophysis | An alternate term for adenohypophysis. (05 Mar 2000) |
| anterior longitudinal ligament | <anatomy> The wide fibrous band interconnecting the anterior surfaces of the vertebral bodies. Synonym: lacertus medius, ligamentum longitudinale anterius. (05 Mar 2000) |
| anterior lunate lobule | The part of the superior surface of the cerebellar hemisphere lying rostral to the horizontal fissure, and adjoining the folium of the vermis. Synonym: lobulus semilunaris superior, anterior lunate lobule, crus I. (05 Mar 2000) |
| anterior margin | The ventral or most forward margin of a structure. Synonym: anterior margin, ventral border. (05 Mar 2000) |
| anterior medial malleolar artery | <anatomy, artery> Origin, anterior tibial; distribution, ankle joint and neighboring integument; anastomoses, branches of posterior tibial. Synonym: arteria malleolaris anterior medialis. (05 Mar 2000) |
| anterior median fissure of medulla oblongata | The longitudinal groove in the midline of the anterior aspect of the medulla oblongata; it is the medullary equivalent of the anterior median fissure of the spinal cord and ends at the foramen caecum posterius; its caudal part is obliterated by the decussation of the pyramids. Synonym: fissura mediana anterior medullae oblongatae, anteromedian groove. (05 Mar 2000) |
| anterior median fissure of spinal cord | A deep median fissure on the anterior surface of the spinal cord. Synonym: fissura mediana anterior medullae spinalis, anteromedian groove, sulcus ventralis. (05 Mar 2000) |
| anterior median line | The line of intersection of the midsagittal plane with the anterior surface of the body. Synonym: linea mediana anterior. (05 Mar 2000) |
| anterior mediastinal arteries | <anatomy, artery> Small twigs supplying anterior mediastinal structures: mainly thymus and lymph nodes. Synonym: rami mediastinales arteriae thoracicae internae, rami thymici, anterior mediastinal arteries, arteriae thymicae, thymic arteries. (05 Mar 2000) |
| anterior mediastinal lymph nodes | Located in the superior mediastinum in relation to the great vessels, these nodes receive lymph from the thymus, pericardium and right side of the heart; their efferent vessels join those of the tracheal nodes to form the bronchomediastinal trunks. Synonym: nodi lymphatici mediastinales anteriores. (05 Mar 2000) |
| anterior mediastinotomy | A limited left anterior thoracostomy for biopsy of the mediastinal nodes out of reach by cervical mediastinoscopy. Synonym: anterior mediastinotomy. (05 Mar 2000) |
| anterior mediastinum | Anterior mediastinum, the narrow region between the pericardium and the sternum containing the thymus or its remnants, some lymph nodes and vessels and branches of the internal thoracic artery. Synonym: mediastinum anterius. (05 Mar 2000) |
| anterior medullary velum | The thin layer of white matter stretching between the two superior cerebellar peduncles, forming the roof of the superior recess of the fourth ventricle. Synonym: velum medullare superius, anterior medullary velum, Vieussens' valve. (05 Mar 2000) |