DERM PATH Flashcards
CAUSES OF DEVELOPMENTAL ANOMALIES.. DUE TO IN UTERO INFECTION
BVDV BLUETONGUE AKABANE PANLEUKOPENIA CLASSICAL SWINE FEVER
STERILE GRANULOMATOUS DERMATITIS
CHRONIC PROCESS- NAG
PYODERMA
MEANS PUS IN THE SKIN
ET: OFTEN STAPHYLOCOCCUS
COMMON IN DOGS
SUPERFICIAL = EPIDERMIS AND HAIR FOLLICLES INFECTED (FOLLICULITIS)
DEEP= DEEP DERMIS- BACTERIAL FURUNCULOSIS- RUPTURED HAIR FOLLICLE, NEUTROPHILIC RESPONSE
WHAT IS A PLAQUE
COALESCED PAPULES
FIRST DEGREE THERMAL BURN
EPIDERMIS
COMPLETE HEALING
REDDENED DARKENED, NECROTIC EPIDERMIS
WHAT ARE THE CAUSES OF SCALE
DISORDERS OF KERATINIZATION
CHRONIC DERMATITIS
URTICARIA
HIVES- SKIN BUMPS DUE TO HYPERSENSITIVITY
= MAST CELL DEGRANULATION
DDX FOR CRUSTY LAMBS
PHOTOSENSITIZATION
DERMATOPHILUS
VIRAL INFECTION- ORF* BLUETONGUE VESICULAR DISEASES
DERMATOPHILOSIS
ET: DERMATOPHILUS CONGOLENSIS
LESIONS ON BACK OR EXTREMITIES
CS: PUSTULES, EXUDATE, MATTING OF HAIR/WOOL, ALOPECIA
PREDISPOSING FACTORS- WET WEATHER, HUMID CLIMATES
CYTOLOGY WILL LOOK LIKE TRAINTRACKS
INTERFACE
AUTOIMMUNE
- PEMPHIGUS FOLIACEUS
- DISCOID LUPUS ERYTHEMATOSUS
LEUKOCYTES AT THE INTERFACE BETWEEN DERMIS AND EPIDERMIS
THIRD DEGREE THERMAL BURN
FULL THICKNESS EPIDERMIS +/- SUBCUTIS
SLOUGHING OF NECROTIC TISSUE FOLLOWED BY GRANULATION
SCAR
LIFE THREATENING
EOSINOPHILIC DERMATITIS
ALLERGIES
HYPERSENSITIVITY
ATOPIC DERMATITIS
MOST COMMON TYPE 1 HYPERSENSITIVITY DIAGNOSED WITH INTRADERMAL SKIN TESTING CLOSELY ASSOCIATED WITH OTITIS EXTERNA ENVIRONMENTAL AND INHALED ALLERGENS
HISTIOCYTOMA
DOGS
HEAD, EARS, NECK, LEGS
ROUND CELLS
BENIGN
PEMPHIGUS FOLIACEUS
AUTOIMMUNE DISEASE TYPE 2 HYPERSENSITIVITY HORSES, DOGS, CATS, GOATS DISTRIBUTION- FACE, EARS, FEET, NAIL BEDS CS: VESICLES, PUSTULES, CRUSTS, ULCERS
DEMODICOSIS
ET: DEMODEX MITE USUALLY YOUNG DOGS ON FACE AND LEGS SELF LIMITING EOSINOPHILIC RXN BECAUSE PARASITES CS: ALOPECIA, ERYTHEMA, DOES NOT CAUSE PRURITIS
EQUINE SARCOID
COMMON IN YOUNG ADULT HORSES
ET: BOVINE PAPILLOMA VIRUS
LATE DERMATITIS SIGNS
SCALING, CHANGE IN OILINESS, ULCERATION, ALOPECIA, LICHENIFICATION, PIGMENT CHANGE, FIBROSIS AND SCARRING
ERYTHEMAE MULTIFORMAE IS WHAT TYPE OF HYPERSENSITIVITY?
TYPE 4
SQUAMOUS CELL CARCINOMA
ET: SOLAR INJURY, CHRONIC INJURY
POORLY PIGMENTED SKIN
WART LIKE (VERRUCOUS)
COMMON ON EAR TIPS, EYELIDS, FACE
MELANIN- HYPERPIGMENTATION
HYPERMELANOSIS, INCREASE IN MELANIN PRODUCTION
ET: ENDOCRINE- CUSHINGS, HYPOTHYROID, CHRONIC INFLAMMATION, FLEA ALLERGY
MELANIN- HYPOPIGMENTATION
HYPOMELANOSIS VITILIGO COPPER DEFICIENCY AUTOIMMUNE PIEBALDISM ALBINISM
IS ERYTHEMA MULTIFORMAE OR TOXIC EPIDERMAL NECROSIS MORE SEVERE WHY?
EM- MILDER
SINGLE CELL APOPTOSIS
TEN- MORE SEVERE
SHEETS OF APOPTOSIS/NECROTIC CELLS (RESEMBLES A BURN)
ACANTHOSIS
INCREASED THICKNESS OF STRATUM BASALE AND SPINOSUM
HYPOTRICHOSIS
LESS HAIR THAN NORMAL
HEREDITARY
CAN BE DUE TO BVDV IN UTERO
IMPETIGO
SUPERFICIAL PUSUTLAR DERMATITIS
=PUPPY PYODERMA
LOCATION: VENTRAL ABDOMEN
HISTOLOGICAL CHANGES THAT LEAD TO VESICLE FORMATION
SPONGIOSIS- INTERCELLULAR EDEMA
HYDROPIC DEGENERATION- INTRACELLULAR EDEMA
ACANTHOLYSIS- DISRUPTION OF INTERCELLULAR JUNCTIONS
CUTANEOUS LYMPHOMA
AGGRESSIVE POOR PROGNOSIS
T CELLS TUMOR IN SKIN
CHEMICALS THAT CAUSE BILIARY OBSTRUCTION
RED LANTANA
TRIBULUS, PANCIUM
SPORODESMIN
HEPATOTOXINS SUCH AS AFLATOXIN
PALPABLE ELEVATION FILLED WITH CLEAR FLUID
VESICLE <1CM
BULLA >1CM
PATH= DEGENERATION AND NECROSIS, INFLAMMATION AND REPAIR
WHAT ARE THE CAUSES OF CRUSTS
DISORDERS OF KERATINIZATION
SEVERE PUSTULAR DERMATITIS
SECONDARY TO ULCERS
WHEALS
ELEVATED IRREGULAR SHAPE
CUTANENOUS EDEMA
OFTEN FLAT SURFACE
WHAT TO DO WHEN COLLECTING A BIOPSY
BIOPSY BEFORE TREATMENT
BE GENTLE
COLLECT MULTIPLE SAMPLES TO INCLUDE RANGE OF TISSUE
INCLUDE CRUSTS
SECONDARY SEBORRHEA DUE TO
ENDOCRINE IMBALANCE OR CHRONIC DERMATITIS
BREEDS PRONE TO PRIMARY IDIOPATHIC SEBORRHEA
COCKERS SPRINGERS WESTIES
WHAT NOT TO DO WHEN COLLECTING A BIOPSY
SURGICALLY PREP THE SITE
GRASP WITH FORCEPS
BIOPSY THE CENTER OF A LESION
HOLD OUT ON HISTORY OR DDX
PRIMARY PHOTOSENSITIZATION TYPE 2
INTRINSIC
CAUSE- PORPHYRIA
LIPOMA
BENIGN GROWTH
LOOKS LIKE FAT ON HISTO
PAPILLOMAS
ET PAPILLOMA VIRUS
CAULIFLOWER LIKE
BENIGN GROWTHS
CAN REGRESS
SEBACEOUS ADENOMA
BENIGN GROWTH IN DOGS
WHITE, YELLOW, GREASY, LUMPY
INFECTIOUS GRANULOMATOUS DERMATITIS
SWAMP CANCER- FUNGAL DERMATITIS- PHYTHIUM INSIDIUM
ACTINOMYCES, NOCARDIA
MYCOBACTERIAL DERMATITIS= FELINE LEPROSY= MYCOBACTERIUM LEPRAEMURIUM
CALLUS
OCCURS ON AREAS OF FRICTION IE ELBOWS