II Final Flashcards
PCV: Cat Normal
24-45%
PCV: Dog Normal
37-55%
Immune Mediated Dz: Blood Smear Abnormalities
spherocytes, agglutination
Anemia: Classifications
bone marrow dysfunction, destruction, loss
Immune Mediated Hemolytic Anemia: Pathophysiology
antibody attachment to RBC
What is main form of IMHA in dogs?
primary
IMHA: Dx
CBC/chem
IMHA: Tx
supportive, immunosuppression
T/F: Transfusing with Whole Blood will raise the platelet count
False
Transfusing with whole blood will NOT raise the platelet count
Tranfusion: Required Volume Equation
k x BW x (desired PCV-recipient PCV)/donor PCV
k=90 for dogs; =60 for cats
Thrombocytopenia: Forms
inadequate production, consumption, destruction, sequestration
Thrombocytopenia: Production DDx
ehrlichia, estrogen toxicity, drugs
Thrombocytopenia: Destruction DDx
immune mediated, infection, venom
Thrombocytopenia: Consumption DDx
acute hemorrhage, DIC
Thrombocytopenia: Sequestration DDx
splenomegaly
Immune Mediated Thrombocytopenia: Lab
platelet less than 50,000, inc. megakaryopoeisis, microthombocytosis
IMTP: Dx
rule out
IMTP: Tx
supportive
What clotting factors are Vit. K dependant?
II, VII, IX, X
DIC: Lab
inc. aPTT, PT, FDP
thrombocytopenia, schistocytes,
dec. antithrombin
DIC: Tx
treat primary dz, supportive
Paraneoplastic Syndrome: Examples
cancer cachexia, hypercalcemia, hyperhistaminemia, hypoglycemia
Cancer Cachexia: Definition
wt. loss despite adequate nutrition
Gastroduodenal Ulcers: Pathophysiology
excess histamine =>inc. gatric acid secretion
Hypercalcemia: Pathogenesis
ectopic production of PTH => extensive bone lysis
Hypoglycemia: Neoplastic Etiologies
insulinoma, hepatic neoplasia, leiomyoma
Hyperestrogenemia: Effects
feminisation syndrome, anemia, thrombocytopenia, neutropenia
Tumor: Dx
biopsy, FNA
Tumor: Grading Factors
degree of differentiation, mitotic index, necrosis
Tumor: Staging Factors
anatomical extent
primary, node, metastasis
When is a patient in Clinical Remission?
no detectable tumor
When is a patient in Partial Response?
dec. in tumor volume by 50%
When is a patient in Stable Dz?
the tumor is between 50% dec. in size and 10% inc. in size
When is a patient in Progressive Dz?
> 10% growth of tumor, new masses
Growth Fraction: Definition
ratio of G1/G2:G0 cells (higher fraction = greater chemo effect)
Alkylating Agent: MoA
creates cross-linked DNA
Antitumjor Antibiotics: MoA
DNA intercalation
Mitotic Inhibitors: MoA
inhibit mitosis
Platinum Compounds: MoA
cross-links DNA
Anti-Metabolites: MoA
interferes w/ transcription
Chemo Tx: Phases
induction, consolidation, maintenance, rescue
What is the order of tumors from most to least likely, to be affected by chemo?
hemopoietic, mast cell, solid carcinomas/sarcomas
Myelosuppression: Protocol Modifications
2-3x10^9/L - reduce dose by 25-50% -or- delay tx for 7d
1-2x10^9/L - non-pyrexic stop and monitor; pyrexic stop, give antibiotic
less than 1x10^9/L - hospitalize
What is Acute Tumor Lysis Syndrome?
rapid tumor cell death => ion release
Alkylating Drugs: Side Effects
mod.-severe myelosuppression, sterile hemorrhagic cystitis
Antitumor Antibiotics: Side Effects
sever myelosuppression, renal toxicity, GI, cardiomyopathy
Platinums: Side Effect
mild myelosuppression, GI, fatal pulmonary edema in cats, renal toxicity
Mitotic Inhibitors: Side Effects
mild myelosuppression, peripheral neuropathy
Radiation Therapy: MoA
DNA destruction, apoptosis
What are radiosensitive tumor types?
bone marrow, gonadal, embryonic
What are radioresistant tumor types?
bone, muscle, cartilage, connective tissue
Radiation: Acute Side Effects
mucositis, moist epidermal inflammation, alopecia, hyperpigmentation
Radiation: Fractionation Protocols
Palliative - high dose once weekly (hypofractionated)
Semi-Definitive - mod. dose 3x weekly
Definitive: low dose 5x weekly
Lymphoma: Sites and Signs
min. general malaise
Alimentary (cats) - v/d, inappetence
Mediastinal - cough, dyspnea, pleural effusion
Lymphoma: Dx
FNA, Biopsy, U/S, IHC
Lymphoma: Tx
Single agent - chlorambucil/ doxorubicin
Multi-agent - CHOP
Lymphoma: Stages
I - single node/lymphoid tissue II - several nodes in region III - generalized lymph node involvement IV - liver/spleen infiltration V - bone marrow/other organ infiltration
T/F: When a Lymphoma patient Relapses, continuing the protocol is the best coarse of action.
False
restart the original protocol
Leukemia: Acute vs Chronic Pathogenesis
Acute - transformation occurs early in the lineage => blasts
Chronic - transformation occurs late in the lineage => mature
Leukemia: Dx
bone marrow, flow cytometry
Leukemia: Acute Tx
pred + vincristine + L-asparaginase
Multiple Myeloma: Signs
progressive anemia, hyperviscocity (gamma globulin)
Multiple Myeloma: Dx
rads, CBC/chem, monoclonal gammopathy
Multiple Myeloma: Tx
melphalan + pred, supportive
Mast Cell Tumor: Dx
FNA, biopsy
Mast Cell Tumor: Staging
I - dermal mass, no regional LNN involvement
II dermal mass w/ regional LNN involvement
III - infiltrating/multiple dermal masses w/ regional LNN involvement
IV - spread to liver/spleen
Substage a - no systemic signs
Substage b - systemic signs
Mast Cell Tumor: Tx
sx, radiation, vinblastine
Hemangiosarcoma: Signs
pain, pale mm
Hemangiosarcoma: Lab
dec. HTC, thrombocytopenia, schistocytes
Hemangiosarcoma: Dx
U/S - demarcated herteroechoic mass w/ anechoic pockets
Hemangiosarcoma: Tx
sx, doxorubicin
Osteosarcoma: Dx
DI, biopsy
Osteosarcoma: Prognosticators
less than 7yr/>10yr, ALKP doesn’t resolve 40d post-op, location
Osteosarcoma: Tx
palliative, sx, chemo
Macule/Patch: Appearance
flat lesion with skin color change
Papule/Plaque: Appearance
raised, non-infiltrative solid lesion
Nodule: Appearance
raised, infiltrative lesion
Vesicle/Bulla: Appearnce
raised, fluid filled pocket
Pustule: Appearance
raised, pus filled pocket
Wheal: Appearance
raised, inflamed pocket
Epidermal Collarette: Appearance
superficial peeling skin associated w/ pustule, vesicle or bulla
Lichenification: Appearance
hyperpigmentation and thickening of skin (elephant like)
What are the 3 “Derm Diligence” tests?
scraping, cytology, culture (specifically DTM)
What are other Dermal tests?
acetate tape, trichogram, FNA, woods lamp, food trials, allergy testing
T/F: Only Dermatophytes will change DTM media red.
False
Other organisms can change the color too.
Comedone: Appearance
dilated hair follicle filled with debris
Pruritis: Causes
Allergy, ectoparasites, infection
What factors help differentiate the cause of pruritis?
site of lesion, seasonality, response to tx
Which pruritic dzs have a non-stop (10) itch?
scabies, FAD, food allergy
Pyoderma: Types
surface - pyotraumatic dermatitis (hot spot), intertigo (fold rash)
superficial - impetigo, superficial bact. folliculitis
Deep - folliculitis, lick granuloma
Pyoderma: Signs
pustules, papules, crusts
Pyoderma: Tx
Surface - topical antibiotics
Superficial - topical +/ systemic antibiotics, 1 wk beyond resolution
Deep - Systemic antibiotics, 2wk beyond resolution
Pyoderma: 1st Tier Systemic Antibiotics
1st gen cephalosporins, amoxicillin, clindamycin
Pyoderma: 2nd Tier Systemic Antibiotics
sulfas, erythomycin, lincomycin, doxycycline
Pyotraumatic Dermatitis: Appearance
acute moist dermatitis on hip/ear
Pyotraumatic Dermatitis: Tx
treat underlying dz, clip and clean
Impetigo: Appearance
pustular rash in axillary/inguinal area of young animals
Impetigo: Tx
self limiting, antibacterial shampoo
Nasal Folliculitis: Etiology
underlying dz => superficial/deep pyoderma on the bridge of the nose
Nasal Folliculitis: Tx
systemic antibiotics, topical cleaning
Canine Acne: Appearance
alopecia, non-painful, non-pruritic, comedone
Canine Acne: Tx
topical benzoyl peroxide
Lick Granuloma: Primary Etiology
atopy, food allergy
Lick Granuloma: Perpetuating Factors
deep pyoderma, ruptured follicles, compulsive behavior
LIck Granuloma: Tx
treat underlying dz (glucocorticoids), treat perpetuating factor
Malassezia: Signs
pruritus, malodor, erythema, paronychia
Malassezia: Dx
cytology
Malassezia: Tx
anti-yeast shampoos, keto-/itra-conazole
Flea Allergy Dermatitis: Signs
papules + crusts on rump, ~> exoriation, alopecia, lichenification
FAD: Dx
observe fleas, allergy test
FAD: Tx
ectoparaciticides, treat any secondary infections
Atopy: Signs
pruritic, seasonal.
affects face, ears, ventrum, feet
Atopy: Dx
signs, rule out
Atopy: Tx
immunotherapy, symptomatic, allergen avoidance
Food Allergy: Signs
pruritis, non-seasonal
Food Allergy: Dx
food trial - 4wks of novelty/hydrolyzed protein
Sarcoptes: Tx
topical dips
Miliary Dermatitis: Appearance
rxn crusted papules, erythema, secondary alopecia
Eosinophilic Granuloma Complex: Forms
indolent ulcer - uni-/bi-lateral upper lip
Eosinophilc plaque - groin, raised ulcer
Colagenolytic granuloma - linear, pharyngeal, chin
Eosinophilic Granuloma Complex: Tx
parasite control, immunosuppression, sx
Folliculitis: Definition
inflammation of follicle wall
Furunculosis: Definition
rupture of follicle within the dermis
Injection Site Alopecia: Injections
rabies, lepto
Injection Site Alopecia: Dx
histo
Dermatophytosis: Hair Preference
anagen hair
Dermatophytoses: Tx
decontaminate environment, topical + systemic (itraconazole) antifungals
What drug do you not use to treat demodex?
glucocorticoids
Local Demodex: Tx
self resolving, treat secondary pyoderma
Generalized Demodex: Tx
ivermectin, treat secondary infections
Sebaceous Adenitis: Pathophysiology
inflammation and destruction of sebaceous glands
Sebaceous Adenitis: Long Hair Signs
alopecia, scaly appearance on head and feet
Sebaceous Adenitis: Short Hair Signs
moth eaten appearance
Sebaceous Adenitis: Dx
skin biopsy
Sebaceous Adenitis: Tx
baby oil/propylene glycol spray
Familial Dermatomyositis: Signs
muscle atrophy, progressive papules + vesicles -> pustules -> ulcers -> crusty alopecia
Familial Dermatomyositis: Dx
signs, histo
Familial Dermatomyositis: Tx
pentoxifylline, immunosuppression, treat seconary pyoderma
Endocrine Alopecia: Etiologies
hypothyroidism, hyperadrenocorticism
Alopecia X: Signs
progressive truncal hair loss, hyperpigmented skin,
Color Dilution Alopecia: Dx
melanin clumping in shaft on tricogram
Otitis Externa: Types of Factors
Primary, predisposing, perpetuation
Otitis Externa: Primary Factors
allergies, parasites, foreign body
Otitis Externa: Predisposing Factors
ear anatomy, excessive moisture, obstruction
Otitis Externa: Perpetuating Factors
secondary infection, ear pathology, otitis media
Otitis Externa: Signs
head shaking (=> hematoma), scratching ears, malodor
Otitis Externa: Dx
signs, otoscopic exam, cytology
Otitis Externa: Tx
topicals w/ antibiotic, steroid, antifungal, (antiparasitic), recheckin 7-10 days
When does Otitis Externa become chronic?
>/= 2mo of persistant otitis >/= 6mo of recurrent otitis
Otitis Media: Signs
horner’s syndrome, facial pralysis
Otitis Media: Dx
signs, abnormal tympanic membrane, rads
Otitis Media: Tx
myringotomy, sx
Zinc-Responsive Dermatosis: Signs
pruritis, scales, hyperkeratosis
Zinc-Responsive Dermatosis: Tx
supplementary zinc
Feline Acne: Signs
alopecia, crusts, and comedones on chin
Feline Acne: Tx
clean, treat secondary dzs
Vit. A-Responsive Dermatosis: Signs
progressive scaling from birth
Vit. A-Responsive Dermatosis: Tx
Vit. A suppliment
Schnauzer Comedone Syndrome: Signs
comedones on the back
Ear Margin Dermatitis: Signs
scaly ear margins w/ follicular casts and partial alopecia
Ear Margin Dermatosis:Tx
mild - shampoos
complicated - pentoxifylline
Pemphigus Foliaceus: Etiology
Autoimmune dz
Pemphigus Foliaceus: Signs
pustules, vesicles, bulae, crusts, alopecia, scales
Pemphigus Foliaceus: Dx
biopsy
Pemphigus Foliaceus: Tx
avoid UV exposure
Localized - topical steroids, combo tetracycline + niacinamide
Generalized - immunosuppression
Superficial Necrolytic Dermatitis: Signs
hyperkeratiotic + crusty footpads
Superficial Necrotlytic Dermatitis: Dx
U/S - honey-comb liver/pancreas
biopsy
Superficial Necrolytic Dermatitis: Tx
treat primary/secondary dz, high protein diet
Discoid Lupoid Erythematosus: Signs
hypopigmentation, erosions, and ulcers on the nose
DLE: Dx
biopsy, history, signs
DLE: Tx
avoid UV exposure
Localized - topical steroids, combo tetracycline + niacinamide
Generalized - immunosuppression
Vasculitis: Signs
purpura, necrosis, ulcers, ischemia
Vasculitis: Tx
Treat underlying cause
Erythema Multiforme: Signs
coalescing macules/papules => erosions/ulcers
Toxic Epidermal Necrolysis: Signs
purpura, ulcers
T/F: Virus based Papillomatosis in a dog can not be transmitted.
False
it can be transmitted
Nodular Panniculitis: Signs
raised, well demarcated lesions