Derm 2025 Lesions

Shar pei’s have a breed disposition to:

Dermal mucinosis - Mucin is the squishy substance between our collagen fibers and the dermis that allow us be squeezed and our tissue does not stay looking deformed.

In sharp peis, there is lack of outflow of mucin, so it starts to leak out.

What is sun induced dermatitis?

Sun induced problem can also be seen in animals that have white and black pattern. If the skin lesions are only localized to the white areas, then it is likely a problem.

Differentiate between a kitten mass and a senior cat mass in the ear canal. Which one is more concerning?

Kitten more likely to have an inflammatory polyp

Older (senior) cat are more likely to be a malignant growth – adenocarcinoma

But BOTH look the same.

Age matters

Provide the steps to a dermatological examination with a body map

Body maps are available for all species

Start at tip of nose to the tip of tail

Start at the back and work distally to the paws

Spread the digits to see all of them in all 4 paws

Mucus membranes could have lesions so look at that too and anal/perineal region

Ears should also be covered

Differentiate between primary and secondary skin lesions

initial eruption driven by skin disease ex: pustule

crusty lesion - ex of secondary lesion

Differentiate between primary and secondary hairloss. Medical term?

Alopecia

Hairloss due to thinning, non itchy - primary

Hairloss and development of pustules due to self induced trauma (scratching) - secondary

Define macule

an area of skin that has changed color

primary lesion

Define papule

Elevated solid, palpable lesion <1cm

can be early stages of pyoderma or skin cancer

primary lesion

Define Plaque

Elevated solid, palpable lesion >1cm

primary lesion

Define Wheal

Circumscribed, raised lesion consisting of edema

Wheal = hives

typically allergic reactions

primary lesion

Define nodule

Circumscribed, solid, elevated lesion >1cm. Often extends into the deeper layers of the skin like the dermis

primary skin lesion

Define Scales

Accumulation of CORNIFIED cells

primary or secondary skin lesion

Hyperpigmentation or hypopigmentation may be ___

indicative of underlying issue

can be primary or secondary skin lesion

Define Comedo

Dilated hair follicle filled with sebaceous material and cornified cells. Patients with hormonal diseases, and hair follicle mites have this.

can be primary or secondary lesion

Define Epidermal Collarette

special type of scale arranged in circular rim of loose keratin flakes or peeling keratin. Confused with ringworm.

can be primary or secondary skin lesion

Define excoriation

Self-induced erosions or ulcers (by scratching, biting); often linear

secondary lesion

Define erosion

shallow epidermal defect that does not penetrate basal laminar zone

Can simply be caused by disease and heal without a scar.

secondary lesion

Define ulcer

A break in continuity of epidermis with exposure of underlying dermis. Red, angry, and can bleed. Can heal but with scar.

Secondary lesion

Ulcers in the mouth or other mucosal tissue can is caused by ___

Break in the continuity of mucosa with exposure of underlying dermis. Can also be on the anus, vulva, or gums.

secondary lesion

Define lichenification

elephant like skin surface, exaggeration of superficial surface architecture, thickening of the skin. Constant inflammation and itchy skin leads to lichenification

secondary lesion