VT 101 Chapter 10 [Pathology] Integumentary System

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Abrasion

Injury in which superficial layers of skin are scraped.

Abscess

Localized collection of pus.

Acne

Skin inflammation caused by plugged sebaceous glands and comedone development from papules and pustules.

Chin acne

Common condition in cats in which acne develops on the chin and lip area.

Acute moist dermatitis

Bacterial skin disease that is worsened by licking and scratching; also called hot spot.

Alopecia

Hair loss resulting in hairless patches or complete lack of hair.

Shedding

Normal hair loss due to various causes.

Atopy

Hypersensitivity reaction in animals involving pruritus with secondary dermatitis; commonly called allergies or allergic dermatitis.

Hypersensitization

Increased response to an allergen.

Hyposensitization

A decreased response to an allergen.

Bullae

Multiple contained skin elevations filled with fluid that are greater then 0.5 cm in diameter. Singular= bulla

Burn

tissue injury caused by heat, flame, electricity, chemicals, or radiation.

Carbuncle

Cluster of furuncles.

Carcinoma

Malignant neoplasm of epithelial tissue.

Cellulitis

Inflammation of connective tissue.

Diffuse

Inflammation widespread.

Localized

Inflammation within a well-defined area.

Comedo

Blackhead or build up of sebum and keratin in a pore. Plural = comedones.

Contusion

Injury that does not break the skin; characterized by pain, swelling, and discoloration.

Crust

Collection of dried sebum and cell debris.

Dermatitis

Inflammation of the skin.

Contact Dermatitis

Inflammation of the skin caused by touching an irritant.

Dermatocellulitis

Inflammation of the skin and connective tissue.

Dermatomycosis

Abnormal skin condition caused by superfical fungus; also called dermatophytosis.

Dermatophytes

Superficial fungi that are found on the skin. i.e. ringworm

Dermatosis

Abnormal skin condition. Plural = dermatosus.

Discoid lupus erythematosus

Canine autoimmune disease in which the bridge of the nose (and sometimes the face and lips) exhibit depigmentation, erythema, scaling, and erosions; abbreviated DLE; may have been called collie nose or solar dermatitis in the past.

Dyskeratosis

Abnormal alteration in keratinization.

Ecchymosis

Purplish nonelevated patch of bleeding into the skin; also called a bruise; Plural = ecchymoses

Ecthyma

Skin infection with shallow eruptions caused by a pox virus; also known as soremouth.

Eczema

General term for inflammatory skin disease characterized by erythema, papules, vesicles, crusts, and scabs either alone or in combination.

Eosinophilic granuloma complex

Collective name for autoimmune lesion of eosinophilic ulcer, eosinophilic plaque, and linear granuloma found in cats and rarely in dogs.

Eosimophilic Ulcer

Located on the lip and oral mucosa of cats. also called rodent ulcer.

Eosinophilic Plaques

Raised pruritic lesions on the ventral abdomen of cats.

Linear granulomas

Located in a line usually on the caudal aspect of the hindlimb of cats.

Erythema

Skin redness.

Erythematous

Pertaining to redness.

Erythroderma

Abnormal redness of skin occurring over a widespread area.

Erythr/o: Erythem/o, Erythemat/o

Combining forms for red

Exanthema

Cutaneous rash caused by fever or disease. Singular = exanthem

Feline Miliary Dermatitis

Skin disease of cats in which multiple crusts and bumps are present predominantly on the dorsum; the disease can be associated with many causes.

Fissure

Cracklike sore.

Fistula

Abnormal passage from an internal organ to the body surface or between two internal organs. Plural = fistulae

Flea Allergy Dermatitis

Inflammation of the skin caused by an allergic reaction to flea saliva; abbreviated FAD.

Allergen

A substance that produces an allergic response.

Footrot

Hoof disease that spreads from the interdigital skin to the deeper foot structures.

Frostbite

Tissue damage caused by extreme cold or contact with chemicals with extreme temperature (e.g. liquid nitrogen).

Furuncle

Localized skin infection in a gland or hair follicle; also called a boil.

Furunculosis

The abnormal condition of persistent boils over a period of time.

Gangrene

Necrosis associated with loss of circulation.

Necrosis

Condition of dead tissue.

Necrotic

Pertaining to dead tissue.

Putrefaction

Decay that produces a foul smell.

Granuloma

Small area of healing tissue.

Hemangioma

Benign tumor composed of newly formed blood vessels.

Hyperkeratosis

Increased growth of the horny layer of skin; also called acanthokeratodermia.

Infestations

Occupation and dwelling of a parasite on the external surface of tissue.

Ectoparafites

Live on the external surface; ecto- = means outside.

Louse

A wingless parasite insect; plural is lice.

Pediculosis

Lice infestation.

Mite

An insect with a hard exoskeleton and paired, jointed legs.

Mange

A common term for skin disease caused by mites.

Sarcoptic and Demodectic

Two types of mange depending on the the type of mite.

Chiggers

Infestation by mite larvae that results in severe pruritus.

Acariasis

Infestation with ticks or mites.

Maggots

Insect larvae found especially in dead or decaying tissue.

Myiasis

Infestation by fly larvae.

Keratosis

abnormal condition of epidermal overgrowth and thickening. Plural = keratoses.

Laceration

Accidental cut into the skin.

Lesion

Pathological change of tissue; used to describe abnormalities in many locations.

Lipoma

Benign growth of fat cells; also called fatty tumor; commonly seen in older dogs.

Macule

Flat, dicolored lesion less than 1 cm in diameter; also called macula.

Melanoma

Tumor or growth of pigmented skin cells.

Malignant melanoma

Describes cancer of the pigmented skin cells.

Amelanotic Melanoma

Unpigmented malignant melanoma.

Nodule

Small knot protruding above the skin.

Onychomycosis

Superficial fungal infection of the claw.

Pallor

Skin paleness.

Papilloma

Benign epithelial growth that is lobed.

Papule

Small, raised skin lesion less than 0.5 cm in diameter.

Parakeratosis

Lesion characterized by thick scales, cracking , and red raw surface caused by the persistence of keratinocyte nuclei in the horny layer of skin.

Paronychia

Bacterial or viral infection.

Patch

Localized skin color change greater than 1 cm in diameter.

Pemphigus

Group of immune mediated skin diseases characterized by vesicles, bullae, and ulcers.

Pemphigus Vulgaris

Most common form of pemphigus, which consists of shallow ulcerations frequently involving the oral mucosa and mucocutaneous junctions.

Petechiae

Small, pinpoint hemorrhages. Singular= petechia.

Plaque

Solid raised lesion greater than 0.5 cm in diameter.

Polyp

Growth from mucous membranes.

Pruritus

Itching.

Purpura

Condition characterized by hemorrage into the skin that causes bruising. Two types are ecchymosis and petechia.

Pustule

Small circumscribed, pus filled skin elevation.

Circumscribed

Contained in a limited area.

Pyoderma

Skin disease containing pus.

Pus

An inflammatory product made up of leukocytes, cell debris, and fluid.

Purulent

Containing or producing pus.

Puppy pyoderma

Skin disease in puppies characterized by pus-containing lesions.

Juvenile pyoderma

Skin disease in puppies that progresses to a systemic disease characterized by fever, anorexia, and enlarged and abscessing lymph nodes; also called puppy strangles.

Sarcoma

Malignant neoplasm of soft tissue arising from connective tissue.

Scale

Flake

Scar

Mark left by a healing lesion where excess collagen was produced to replace injured tissue; also called cicatrix or cicatrices, which are multiple scars.

Sebaceous Cyst

Closed sac of yellow fatty material.

Cyst

A closed sac containing fluid or semisolid material.

Seborrhea

Skin condition characterized by overproduction of sebum (oil).

Skin tag

Small growth that hangs from the body by stalks.

Ulcer

Erosion of skin or mucous membrane.

Decubital Ulcers

Erosions of skin or mucous membranes as a result of prolonged pressure; also called bedsores.

Urticaria

Localized areas of swelling that itch; also called hives.

Verrucae

Warts

Vesicle

Contained skin elevation filled with fluid that is greater than 0.5 cm in diameter; also called a blister, bulla, or bleb.

Wheal

Smooth slightly raised swollen area that itches.

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