FINAL- DERM UNKNOWNS Flashcards
What is morphologically abnormal? MDx?
Potential cause; Dx steps?
crust and alopecia
inflammation of the skin-dermatitis exudative/pustulated
MDx: dermatitis exudative/pustulated
Demodex case
but why is there so much pus- secondary bacterial infection
remember that sacroptic mange can look the same
This 6 month old bighorn sheep has been rejected by its ewe
The sedated ewe of the lamb in the preceding image is being examined by a biologist (below).
scabby mouth with crust with ulceration
on the gums- multi-nodular mass
DDx: ORF or vesicular disease or photosentization or Deramatophilis
what is most likely if you have the mom and the babe? ORF
how would get an Edx(cause +lesion put together)- Viral Dermatitis or Pox Viral Dermatitis
What is morphologically abnormal? MDx?
Most likely cause?
Mdx: hypopigmentation/ leukoderma or leukotricia
Most likely cause: albinism
caused by tyrisonase enzyme, which will not allow melanin to be made but they will have the normal amount of melanocyts
Skin of an adult horse
What is morphologically abnormal?
Most likely pathological process?
ulcerated plaque because it’s eleated
inflammation or neoplasia
could be a sarcoid or squamous cell carcinoma
swamp cancer(granulamatous) ? or summer sores(caused by larval migration in tissue) or proud flesh
Mdx: granulatous dermatis or sarcoid
Do a biospy to find out which one!
Skin of an adult horse
What is morphologically abnormal?
Most likely pathological process? MDx?
melanoma grey horse- location
pigmentated
mass
puppy has facial pustules and lymphadenomegaly.
What is the most likely disease diagnosis?
Puppy strangles
pathogenesis: This is idiopathic; doesn’t seem to be caused by an infection
What is morphologically abnormal? Most likely pathological process? MDx?
dark, discrete, dry, sharp line of dermarkcation
necrosis due to an infarct(due to sharp line);
Mdx: dry gangene or cutaneous infarct
cause: frostbite; ecludes blood vessels from
What is morphologically abnormal? MDx?
erythema and lickentfication
MDx: chronic dermatitis
hyperpigmentation and erythecema are classical follow ups to dermatitis
We are concerned this is an estrogen producing sertoli cell tumor in a retained testicle.
What are some expected associated skin lesions?
hypermelanosis
alopecia
hyperkeratosis- scales
3 dogs with similar lesions.
What is morphologically abnormal? MDx?
3 potential causes = ???
epidermal collarettes and some alopecia
pustule has ruptured
3 causes:
- ring worm
- superficial spreading pyoderma
- demodex
These are centered around the follicle! Theses are all foliculitis!!!
What is this disease?
greasy pig
Staph hycius
predisposing conditions: crowding, poor nutrition of the pig
Neutrophils are the primary cell
Most likely pathological process?
ulcerated mass- neoplasia or inflammation
squamous cell(- usually in sparly haired areas but it got an injection in that area
sheep
What is morphologically abnormal? MDx?
Potential causes = ???
crusty nose- want to look for vesicles and pustules
MDx: exudative dermatis or rhinoitis
potential causes: viral- vesicular; Foot and mouth, vesicular stomatis, vesicular examthema, and swine vesicular disease, photosenitization, dermataphilius
IT”S FMD
goat with ORF in the early states
Cat.
What is morphologically abnormal? MDx?
Plaques; edema because they are shiny, alopecia, erthyemia, really discrete edges
Eosinophilic plaques- usually an allergic skin disease going on
Dog.
What is morphologically abnormal? Dx steps:
Most likely disease?
ulcearted nodule
with purulent discharge
Cytology- aspiration( do not use the pus on the surface)
Leproid granuloma causes by saprophic Microbacteria(usually in Boxers)
granulatmatis response so you will see lots of macrophages
YOU DON’T HAVE TO SEE MICROBACTERIA ON HISTO- you could just have a couple
lesions in non-pigmented areas-photosentization but then why is it on the limbs
vasculitis- infaraction; discrete areas of necrosis
what is a cause of vasucultitis? bacterial infection, toxins, hypersensitivity
Proporia hemorragica- usally from a strep equi, equi infection
erythema, crusts, areas are probably ulcerated, anatomy is being altered—> infilitrated process;
there is a mass in the white area– squaous cell carcinoma in the butt of a sheep
Dermatophlius
there were bbs in the lesion
