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Hereditary Skin Diseases
VM 610 Midterm
69
Veterinary Medicine
Professional
11/13/2012

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Term
Dermoid sinus
Definition
Rhodesian ridgebacks
Epithelial lined tube
Located long dorsal midline
Incomplete separation between ectoderm and neural tube
Connection between skin surface down to meninges
surgical excision to maintain sterility
Term
Cutaaneous asthenia
Definition
defect in collagen synthesis
increased skin laxity and fragilit
avoid trauma and declaw cats
Term
Cutaneous Mucinosis
Definition
Shar Peis
increased mucin in dermis leads to excessive skin folds with vesicles filled with mucin
increased mucin in oropharynx may impair respiration
Term
Cutaneous Mucinosis Treatment
Definition
corticosteroids can be used to decrease mucin production
pentoxifylline may be beneficial to block collagenase activity
Term
Canine Familial Dermatomyositis
Definition
Shelties and Collies
Show up in young puppies around the time they are weaned
Term
Canine Familial Dermatomyositis Lesions
Definition
scarring, alopecia, blisters around eyes and on bridge of nose
hairless tip to their tail
hocks, perianal region, and extremities affected
Term
Canine Familial Dermatomyositis Signs
Definition
difficulty swallowing and see food being washed into water bowl when drinking
high stepping gait
atrophy of muscles of head and limbs
megaesophagus
aspiration pneumonia
all associated signs with myositis
Term
Canine Familial Dermatomyositis Diagnosis
Definition
biopsy of affected skin and muscle
EMG
vacuolar changes in basal cells
occasional apoptotic basal cell
follicular atrophy and fibrosis
vasculitis/vasculopathy may be present
Term
Canine Familial Dermatomyositis Treatment
Definition
pentoxiphylline
tetracyline
prednisolone
tacrolimus
neuter
Term
Epidermolysis Bullosa
Definition
separation between epidermis and dermis
defects in proteins in basement membrane
dystrophic type=defective Type VII collagen
junctional type= defective laminin 5
Term
Epidermolysis Bullosa Signs
Definition
blistering and sloughing of skin subjected to trauma
Term
Epidermolysis Bullosa Diagnosis
Definition
positive Nikolski sign
biopsy
Term
Epidermolysis Bullosa Treatment
Definition
avoid trauma
antibiotics to treat secondary infections
Term
Acral Mutilation Syndrome
Definition
German Short-Haired Pointers, English pointers
sensory neuropathy
chew off toes
no effective treatment
Term
Lethal Acrodermatitis
Definition
Bull Terriers
Can't absorb zinc
Zinc is an important cofactor for everything in the body
Can't make proteins
Toes and toenails grow abnormally
Tend to be aggressive
autosomal recessive
Term
Lethal Acrodermatitis Signs
Definition
growth retardation
progressive acrodermatitis
chronic pyoderma
chronic paronychia
diarrhea
pneumonia
abnormal behavior
survive around 7 months
neutrophilia, hypercholesterolemia, low ALP, low plasma zinc
Term
Lethal Acrodermatitis Management
Definition
treat skin infections
zinc and fatty acid supplements
aloe vera cream
liquid diet
probiotics/yogurt
Term
Nodular Dermatofibrosis
Definition
mutations of gene
occurs in German Shepherds
autosomal dominant
multiple nodules develop over limbs and head
dogs usually older than 3 years
associated with renal cystadenocarcinomas and uterine leiomyoma
Term
Nodular Dermatofibrosis Signs
Definition
renal lesions in dogs less than 1 year old
skin biopsies show dense collagen (collagenous nevi)
Term
Congenital Hypotrichosis
Definition
hair loss at birth or within first few months of life
faulty development of hair follicles
other adnexal structure and/or teeth may be abnormal
Chinese crested dog, sphinx cat, Mexican hairless dog
Term
Congenital Hypotrichosis Management
Definition
protect from UV light
Term
Black Hair Follicle Dysplasia
Definition
Large Munsterlanders dogs, Terriers, Chihuahuas, mixed breeds
black areas have broken hairs and hair loss
white areas have normal hair
Term
Black Hair Follicle Dysplasia Diagnosis
Definition
trichogram shows clumped melanin and distorted hairs
Term
Black Hair Follicle Dysplasia Management
Definition
emollients
ethyl lactate shampoo
melatonin
Term
Melatonin
Definition
produced by pineal gland during periods of darkness
stimulates anagen (growth phase)
may also down-regulate androgen receptor activity
Term
Color Mutant Alopecia
Definition
aka Blue domerman syndrome
any blue colored dogs can be affected
melanin clumping in hair bulbs and shafts results in brittleness
hairs break
secondary infections common
Term
Color Mutant Alopecia Management
Definition
follicle flushing shampoos
antibiotics for secondary infections
melatonin
Term
Canine Recurrent Flank Alopecia
Definition
Airdale terries, boxers, english bulldogs
genetic cyclic follicular dysplasia associated with deficiency of melatonin
onset may be fall or spring
not pruritic
Term
Canine Recurrent Flank Alopecia Diagnosis
Definition
rule out other causes of multifocal alopecia
biopsy shows market follicular hyperkeratosis
follicular plugging results in distortion of hair follciles
Term
Canine Recurrent Flank Alopecia Management
Definition
observation
melatonin
Term
Follicular Dysplasia of Curly-Coated Breeds
Definition
Irish Water Spaniels
Chesapeake Bay Retrievers
Portugese Water Dogs
Siberian huskies
primary hairs break
secondary hairs are lighter and more wooly
hair loss on trunk, thighs, neck
Term
Follicular Dysplasia of Curly-Coated Breeds Diagnosis
Definition
rule out other causes
biopsies
Term
Follicular Dysplasia of Curly-Coated Breeds Management
Definition
ethyl lactate shampoo
antiseborrheic shampoos and sprays
melatonin
treat secondary infections
Term
Canine Pattern Baldness
Definition
Daschund, Boston terrier, Chihuahua, Whippet, Italian greyhoud, Greyhoud, Boxer, Mini pin, Manchester terrier
Term
Canine Pattern Baldness Signs
Definition
4 common patterns
pinnal alopecia
neck, thigh and tail alopecia
caudal thighs and ventral abdomen alopecia
post-auricular, ventral neck, ventral abdomen, thigh alopecia
Term
Canine Pattern Baldness Diagnosis
Definition
rule out other signs
biopsy
Term
Canine Pattern Baldness Management
Definition
observation
melatonin
Term
Canine Pattern Baldness
Definition
Daschund, Boston terrier, Chihuahua, Whippet, Italian greyhoud, Greyhoud, Boxer, Mini pin, Manchester terrier
Term
Canine Pattern Baldness Signs
Definition
4 common patterns
pinnal alopecia
neck, thigh and tail alopecia
caudal thighs and ventral abdomen alopecia
post-auricular, ventral neck, ventral abdomen, thigh alopecia
Term
Canine Pattern Baldness Diagnosis
Definition
rule out other signs
biopsy
Term
Canine Pattern Baldness Management
Definition
observation
melatonin
methytestosterone
ketoconazole
triostane
op'DDD
Term
Schnauzer Comedo Syndrome
Definition
miniature Schnauzer affected
along dorsal midline see comedones and crusted papules
due to hair follicle keratinization defect
Term
Schnauzer Comedo Syndrome Diagnosis
Definition
rule out other causes
Term
Schnauzer Comedo Syndrome Management
Definition
follicle flushing shampoos
antiseptic wipes
antibiotics
Term
Epidermal turnover
Definition
normal is 21 days
time for cell to move from basal cell layer to stratum corneum for exfoliation
inflammation speeds up keratinization
Term
Dandruff/Seborrhea
Definition
develops if changes in mitotic rate, process of keratinization, or abnormalities in desquamation
Term
Seborrhea sicca
Definition
accumulation of scales and/or sebum on skin surface that is dry
Term
Seborrhea oleosa
Definition
accumulation of scales and/or sebum on skin surface that is dry that is oily
Term
Seborrhea dermatosis
Definition
accumulation of scales and/or sebum on skin surface that is dry that is inflamed
Term
Primary Seborrhea
Definition
hereditary abnormality in keratin formation, sebum formation, or intercellular lipids
Term
Secondary Seborrhea
Definition
underlying disease, drug, or environmental condition responsible for development
Term
Primary Seborrhea in Cocker Spaniels
Definition
epidermal cell renewal time of 8 days compared to normal time of 21 days
basal mitotic index may be 3-4X normal
Term
Seborrhea Management
Definition
antiseborrheic shampoos
control of secondary infections
moisturizers
vitamin A
acriretin
isotretinoin
topical retinoids
Term
Keratolytic
Definition
breaks down junctions between cells in stratum cornea
Makes them look better right away
breaks down keratin
Term
Keratoplastic
Definition
Decreases DNA synthesis in stratum basale
Slows down mitotic rate
Has to penetrate through epidermis to get down that deep
10 minute contact time
The longer the contact time the better
Need to do this every day or every other day for a while
Won't dry out their hair coats with these medicated shampoos
Term
Degreasing
Definition
solubilizes lipids
suppresses sebaceous glands
Term
Moisturizing
Definition
restores intercellular lipids
Term
Canine Ichthyosis
Definition
primary keratinzation problem
abundant scales
keratinous projections
Term
Epidermolytic Canine Ichthyosis
Definition
Norfolk terrier, rhodesian ridgeback, lab, cavalier king charles spaniel
Term
Nonepidermolytic Canine Ichthyosis
Definition
Jack Russell terrier, Australian terrier, Cairn terrier, Norfolk terrier, American bulldog, Golden retriever
defect in intercellular lipids, cornified envelop, or desmosomes
skin does not exfoliate correctly
need EM to diagnose
Term
Canine Ichthyosis Management
Definition
hydrotherapy
topical antiseborrheics
emollients
reitnoids
vitamin A
Term
Sebaceous Adenitis
Definition
Standard poodle, Akit, Vizsla, Samoyed
young to middle aged
Term
Sebaceous Adenitis Signs
Definition
symmetrical alopecia, scaling
dry coat on dorsum, nose, tail, pinna, trunk
follicular casts and matting
moth-eaten alopecia
secondary pyoderma
hairs epilate easily and lots of derbis around hair shafts
Term
Sebaceous Adenitis Treatment
Definition
follicle flushing shampoos
moisturizers
isotretinoin
vitamin A
tetracycline
cyclosporine
treat secondary infections
no cure
Term
Exfoliative Cutaneous Lupus Erythematosus
Definition
German Shorthaired pointers
autosomal recessive
lesion starts 6 mo - 3 years
Term
Exfoliative Cutaneous Lupus Erythematosus Signs
Definition
scaling on face, ears, dorsum
painful and pruritic
may wax and wane
peripheral lymphadenopathy
secondary pyoderma
Term
Exfoliative Cutaneous Lupus Erythematosus Treatment
Definition
antiseborrheaic therapy
treat secondary pyoderma
cyclosporin helps but doesn't cure
prognosis is guarded
omega 3 FA
carprofen for pain
Term
Epidermal dysplasia
Definition
Their skin becomes very thickened and wrinkled due to intense lichenification
look like armadillo
Term
Acanthosis Nigricans
Definition
Daschunds
or due to secondary problems
darkening of skin
Vitamin E and lose weight
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