| antigen presentation | A cell that carries on its surface antigen bound to MCH Class I or Class II molecules and presents the antigen in this context to T-cells. Includes macrophages, endothelium, dendritic cells and Langerhans cells of the skin. See: MHC restriction, histocompatibility antigens. (18 Nov 1997) |
|---|---|
| vertex presentation | See: cephalic presentation. (05 Mar 2000) |
| cephalic presentation | Presentation of any part of the foetal head, usually the upper and back part as a result of flexion such that the chin is in contact with the thorax in vertex presentation; there may be degrees of flexion so that the presenting part is the large fontanel in sincipital presentation, the brow in brow presentation, or the face in face presentation. Synonym: head presentation. (05 Mar 2000) |
| pelvic presentation | Presentation of any part of the pelvic extremity of the foetus, the nates, knees, or feet; more properly only of the nates; frank breech presentation occurs when the foetus presents by the pelvic extremity; the thighs may be flexed and the legs extended over the anterior surfaces of the body; in (05 Mar 2000) |
| clinical presentation | This refers to the typical physical signs or symptoms that are associated with a particular disease process. The proper interpretation of the clinical presentation often leads to a specific diagnosis. (27 Sep 1997) |
| placental presentation | <obstetrics> The anatomic positioning of the placenta over the cervical os (opening to the birth canal). This is an important cause of painless third trimester bleeding in the pregnant female. Many cases of placenta previa will require cesarean section delivery. (31 Dec 1997) |
| polar presentation | The presentation of either pole of the foetal oval; may be either a cephalic or breech presentation, or a longitudinal lie. (05 Mar 2000) |
| presentation | 1. <obstetrics> The relationship of the long axis of the foetus to that of the mother (also called lie) 2. The presenting part, i.e. That portion of the foetus which is touched by the examining finger through the cervix or during labour, is bounded by the girdle of resistance. Origin: L. Praesentatio (18 Nov 1997) |
| presentation, footling | There are single-footling or double-footling presentations depending upon whether the presenting part of the baby at delivery is just one foot or both feet. (12 Dec 1998) |
| presentation, vertex | In a vertex presentation, the top of the baby's head comes first at delivery. The vertex here refers specifically to the top of the head the word vertex in latin means a whirlpool, whirlwind, top of the mountain, or the top of the head. Why top of the head ? because the hairs on the top of the head often form a whorl, a whirl-like pattern. (12 Dec 1998) |
| head presentation | Presentation of any part of the foetal head, usually the upper and back part as a result of flexion such that the chin is in contact with the thorax in vertex presentation; there may be degrees of flexion so that the presenting part is the large fontanel in sincipital presentation, the brow in brow presentation, or the face in face presentation. Synonym: head presentation. (05 Mar 2000) |
| shoulder presentation | Transverse presentation with the shoulder as the presenting part. Synonym: acromion presentation. (05 Mar 2000) |
| sincipital presentation | See: cephalic presentation. (05 Mar 2000) |
| incomplete foot presentation | See: breech presentation. (05 Mar 2000) |
| transverse presentation | An abnormal presentation, neither head nor breech, in which the foetus lies transversely in the uterus across the axis of the parturient canal. (05 Mar 2000) |