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Large Animal Surgery > Melanoma > Flashcards

Flashcards in Melanoma Deck (12):
1

What horses do we most commonly see benign melanomas in?

Aged, grey horses.

2

What horses do we most commonly see malignant melanomas in?

Non-grey horses.

3

Describe the 3 histologic features of a benign melanoma.

Well-circumscribed
Low number of mitotic figures
Well differentiated cells

4

Describe the 2 histologic features of a malignant melanoma.

Large number of mitotic figures
Poorly differentiated cells

5

What percentage of grey horses over 15 years of age have melanomas?

80%

6

Where do melanomas occur most frequently on horses?

Perineum of ventral surface of the tail.

NOTE: Sometimes, they can be large enough to block fecal output.

7

What can you use to cause complete of partial regression of a melanoma?

Cimetidine TID for 3 months, then once regression achieved, SID.

8

What is done in swine with congenital benign melanomas?

Usually sent to slaughter early.

9

When do we usually see melanomas in cattle?

Often congenital, or seen in animals

10

What is an H-plasty?

A plastic surgery pattern often used to correct the defects left after removing a melanoma.

11

When performing an H-plasty, what do we do to prevent puckering?

Cut triangles at the ends of each arm.

12

When performing an H-plasty, what types of suture pattern do we want to for sure have across the defect?

Tension relieving sutures like vertical mattress.