lentigo maligna is a type of **melanoma in situ**, meaning abnormal melanocytes are confined to the top layer of skin. It most often appears as a slowly enlarging, unevenly pigmented patch on **chronically sun-exposed skin**, especially the face. It is a medical diagnosis used primarily in dermatology and skin cancer care, and it commonly affects **cosmetic and reconstructive planning** after removal. Because it often occurs on visible areas, management may involve plastic surgery techniques to support appearance and function.

melanoma is a type of skin cancer that starts in pigment-producing cells called melanocytes. It most often develops in the skin, but it can also occur in the eye or on mucosal surfaces. In cosmetic and reconstructive settings, melanoma is commonly discussed when evaluating changing pigmented lesions and planning safe excision with reconstruction. It is relevant to both cosmetic outcomes (scar placement, contour) and reconstructive goals (restoring form after tumor removal).

squamous cell carcinoma is a malignant tumor that arises from squamous cells, which are flat cells found in the skin and some mucosal linings. It most often refers to a skin cancer on sun-exposed areas, but it can also occur on the lips, mouth, genital skin, and other sites. In cosmetic and plastic surgery, it matters because treatment can affect visible areas (like the nose, eyelids, and lips) and may require reconstruction.

basal cell carcinoma is the most common type of skin cancer and starts in basal cells in the epidermis (outer skin layer). It most often appears on sun-exposed areas such as the face, scalp, ears, and neck. In plastic and reconstructive care, it is commonly discussed because treatment can involve tissue removal and repair to restore form and function. It can also be relevant in cosmetic settings when lesions are noticed during skin evaluations or before elective procedures.

giant congenital nevus is a large birthmark present at or near birth, most often made up of pigment-producing skin cells. It typically appears as a dark patch or plaque that may be raised, textured, or hair-bearing. In clinical practice, it is discussed in both reconstructive and cosmetic contexts because it can affect appearance, skin function, and long-term monitoring plans. The term is commonly used by dermatology and plastic surgery teams when planning observation, imaging, or removal-based reconstruction.

A congenital nevus is a mole-like skin lesion that is present at birth or becomes visible shortly after. It is made up of pigment-producing cells (melanocytes) located in the skin. Congenital nevi can be small, medium, large, or extensive, and their surface and color can vary. In cosmetic and reconstructive care, congenital nevus is commonly discussed when considering monitoring, appearance-focused treatment, or surgical removal with reconstruction.

A dysplastic nevus is an atypical mole with features that look different from a common benign mole. It is a clinicopathologic term, meaning it can be described by how it looks on the skin and by how it appears under the microscope. It is most commonly used in dermatology and pathology, and it also matters in cosmetic and reconstructive planning when moles are removed and the skin is closed for the best scar placement.

A nevus is a circumscribed (well-defined) skin lesion, commonly called a “mole” or “birthmark.” It represents a localized overgrowth of certain skin cells, often pigment-producing melanocytes. A nevus can be present at birth or appear over time, and it may be flat, raised, or textured. It is discussed in both cosmetic and reconstructive care because it can affect appearance and, in some cases, requires clinical evaluation.

A mole is a common skin growth made up of pigment-producing cells (melanocytes) or related skin structures. It can be flat or raised and may be tan, brown, black, pink, or skin-colored. In cosmetic and plastic practice, a mole may be assessed for appearance, irritation, and diagnostic clarity. In reconstructive care, mole evaluation may be part of broader skin surveillance or lesion management.

A hemangioma is a benign (non-cancerous) growth made up of blood vessels. It most often refers to a vascular lesion of the skin or soft tissue, frequently seen in infancy and childhood. In cosmetic and plastic practice, hemangioma is discussed when it affects appearance, symmetry, scarring risk, or function. Management may be observational or procedural, depending on type, location, and symptoms.

A port-wine stain is a congenital vascular malformation (capillary malformation) that appears as a persistent pink, red, or purple skin patch. It is caused by abnormally dilated superficial blood vessels in the skin. It can involve the face or body and may change in color and texture over time. It is discussed in both cosmetic care (appearance) and reconstructive/medical care (associated findings and tissue changes).

A venous lake is a small, dilated vein near the skin surface that appears as a soft blue-to-purple spot. It most often shows up on sun-exposed areas such as the lip (especially the lower lip), ear, or face. It is a benign vascular lesion, meaning it is non-cancerous and made up of enlarged blood vessels. In cosmetic and reconstructive care, it is commonly evaluated for appearance, bleeding risk, or diagnostic clarity.

A spider angioma is a small, superficial cluster of visible blood vessels with a central red spot and fine “spokes” radiating outward. It is a common benign (non-cancerous) vascular lesion seen on the skin, often on the face, neck, and upper chest. In cosmetic medicine, it is discussed because it can be noticeable and cosmetically distracting. In clinical medicine, it is also noted because multiple lesions can sometimes be associated with hormonal or systemic conditions.

A cherry angioma is a common, benign (non-cancerous) growth made of small blood vessels in the skin. It often appears as a red, cherry-colored dot or small dome-shaped bump on the surface of the skin. It is most often discussed in dermatology and cosmetic care because of its appearance. In reconstructive settings, it is usually relevant for diagnosis and reassurance rather than “repair.”

An angioma is a benign (non-cancerous) growth made up of blood vessels. It most often appears on the skin as a small red, purple, or blue spot or bump. In cosmetic care, angioma commonly refers to superficial vascular lesions people choose to treat for appearance. In reconstructive settings, angioma-related care may focus on symptoms, bleeding, or restoring a more even surface.

dermatofibroma is a common, usually benign (non-cancerous) skin growth made of fibrous tissue. It typically appears as a firm, small bump in the skin, often on the legs or arms. It is most often discussed in dermatology, but plastic surgery may be involved when removal is requested for appearance or scar planning. Many dermatofibroma lesions are harmless and may be monitored unless they change or bother the patient.

An acrochordon is a common, benign (non-cancerous) skin growth often called a “skin tag.” It is typically a soft, flesh-colored or slightly darker bump that may hang on a narrow stalk. It most often appears in skin folds where friction occurs, such as the neck, underarms, or groin. It is discussed in both medical and cosmetic settings because it can be bothersome or cosmetically unwanted.

A skin tag is a small, soft, usually flesh-colored growth that projects from the skin on a narrow stalk. It is considered a benign (non-cancerous) skin lesion in most routine clinical contexts. It commonly appears in areas of friction such as the neck, armpits, groin, and under the breasts. In cosmetic and minor procedure settings, skin tag removal is typically performed for comfort or appearance.

seborrheic keratosis is a common, noncancerous (benign) skin growth that arises from the epidermis (the outer skin layer). It often appears as a “stuck-on,” waxy, or warty-looking spot on the skin. It is most often discussed in medical dermatology and cosmetic practice because it can resemble other lesions and may be removed for appearance or irritation. It is not an implant, filler, or reconstructive material; it is a diagnosis describing a skin lesion.

actinic keratosis is a rough, scaly skin growth caused by long-term ultraviolet (UV) exposure. It is considered a precancerous (premalignant) change in the outer skin layer (epidermis). It most often appears on sun-exposed areas like the face, scalp, ears, forearms, and hands. It is commonly addressed in medical dermatology and dermatologic surgery, and it also overlaps with cosmetic practice when improving sun-damaged skin appearance.