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Abbe flapReconstruction of a labial (lip) defect with a local flap from the opposing lip (upper/lower lip) based on the blood supply from the labial artery (a. labialis).
ABCDE ruleA tool for systematic clinical assessment of a nevus
A: Asymmetry (asymmetry when drawing a line through the birthmark)
B: Border (irregular borders that are difficult to delineate)
C: Color (the presence of more than one color: e.g. different shades of blue, red, brown, and black)
D: Diameter (>6mm in diameter)
E: Evolving (changes in size, color, shape, incident itching, bleeding, or scarring).
AbdominoplastyA surgical procedure to remove excess skin and subcutaneous layers of fat from the abdomen. Multiple techniques exist for addressing multiple regions. It is often due to more extensive excess skin and/or skin looseness in more than one plane. E.g. Fleur de Lis with a vertical abdominal incision, or a 360˚ Belt Lipectomy where the skin is tightened in a belt shape around the abdomen and lower back. 

Link: https://plastsurgeon.com/massive-weight-loss/abdominoplasty/anatomy/
AbscessA collection of pus in a cavity formed by necrosis due to an inflammatory process.
Acne vulgarisA common term for a group of skin diseases of papular nature, which occurs in the follicular apparatus in seborrheic areas. They can be classified based on their type and degree. 
AdenomaA benign tumor derived from glandular tissue.
Adnexal tumorAdnexal cell tumors are derived from connective tissue, and examples of this are sebaceous carcinoma, trichilemma carcinoma, or pilomatrix carcinoma.
Adson forcepsSmall surgical forceps characterized by ‘teeth’ at the holding jaws, in comparison to the anatomical forceps that has grooves. These forceps are used for gentle tissue handling, e.g. tissue of the face. 

Link: https://plastsurgeon.com/surgical-instruments-2/forceps/
Advancement flapA common term for a local skin flap, that can be moved to a primary defect by advancement. E.g. V-Y-flap or H-flaps.

Link: https://plastsurgeon.com/facial-flaps/advancement-flaps/
Aesthetic unitsVarious sites of the body, for instance, the face, consists of aesthetic units. Examples are the nose which consists of several units: ala nasi, dorsum, columella, etc.
Allis clampA surgical plier instrument with teeth, which can be used to hold tissue. Keeps its grasp by having the crémaillère.

Link: https://plastsurgeon.com/surgical-instruments-2/clamps/
AlopeciaBaldness. The reason for this is manifold.
Anatomical forcepsCharacterized by grooves at the holding jaws, in comparison to the Adson forceps which has teeth. It is, amongst other things, used for the management of skin grafts or nerves. 

Link: https://plastsurgeon.com/surgical-instruments-2/forceps/
AngiomaA tumor derived from vascular or lymphatic vessels.
AnhidrosisLack of sweating.
Antia-BuchA surgical procedure for reconstruction of the outer ear after partial excision of the helix. The skin which covers the ear cartilage is undermined and advanced towards the defect.
AntihelixThe convex part of the outer ear. It is Y-shaped and has the helix posteriorly and the concha anteriorly. 
AntitragusA protuberance of cartilage superior to the lobulus, which points anteriorly and is located opposite to tragus.
Aquacel burnA dressing used for burn injuries. It keeps the wound moist while still allowing drainage of excess exudation.
Arcus zygomaticusThe underlying bone process forms the prominence of the cheekbone.
AreolaThe pigmented area around the nipple. It contains 10-15 sebaceous glands (Glands of Montgomery), which produce oily secretions to protect the nipple during breastfeeding.
AtheromaA benign epithelial cyst that contains sebum.
Augmentation, breastSurgically increasing the size of the breast. It can be done with the patient’s tissue (autologous augmentation) or with implants of different compositions (silicone or saline).
AuriculaThe auricle creates the aesthetic appearance of the ear. It is comprised of skin folded around a plate of elastic cartilage. The ear reaches downwards as a tapered structure, the earlobe (lobulus auricularis), where cartilage isn’t present. Anteriorly, the skin is thin and tightly bound, posteriorly it is looser and thicker.