Mammary Neoplasia

Question 1

there are __ pairs of mammary glands and each gland consists of multiple secretory lobules within a __ capsule and __ muscle within the epithelium

Answer 1

5, fibroelastic, smooth

Question 2

canine mammary neoplasia is the most __ tumor in intact females with incidence __ with age

Answer 2

common, increasing

Question 3

50% of canine mammary tumors are __

Answer 3

malignant

carcinomas or sarcomas

Question 4

inflammatory carcinoma =

Answer 4

BAD (mammary neoplasia)

Question 5

t/f: >50% of dogs develop a new ipsilateral mammary tumor after regional mastectomy for a single tumor

Answer 5

t

Question 6

what can decrease risk of developing new mammary tumors?

Answer 6

OVH

Question 7

feline mammary neoplasia (adenocarcinoma) is less common but __ are malignant if they do appear

Answer 7

90%

Question 8

feline OVH can reduce the risk of mammary neoplasia by __ in the first 6 months and __ in the first year but does little after 2 years old

Answer 8

91%, 86%

Question 9

__ is the most common feline mammary neoplasia

Answer 9

adenocarcinoma

Question 10

t/f: you can differentiate a malignant or benign mammary tumor with FNA

Answer 10

F- you can’t differentiate with FNA

Question 11

treatment of choice for older cats with mammary tumors

Answer 11

radical mastectomy with lymph node staging

Question 12

surgery is the treatment of choice for all mammary tumors except__ or the presence of __

Answer 12

inflammatory carcinomas, distant metastasis

Question 13

lumpectomy is an __ biopsy and is not recommended unless __ of normal tissue is removed with the mass

Answer 13

excisional, 1-2cm

Question 14

simple mestectomy’s remove __ gland while regional remove glands __ or glands __

Answer 14

1, 1-3, 3-5

Question 15

radical chain mastectomy

Answer 15

removal of all mammary glands, SQ tissue, and associated lymphatics

Question 16

indications for radical chain mastectomy

Answer 16

• mammary tumors in cats
• multiple tumors
• tumors involving third or central glands
• large tumors >1 cm with fixation or suspicion of malignancy

Question 17

in a mastectomy individually ligate the ___ artery and vein

Answer 17

caudal superficial epigastric

Question 18

t/f: radical mastectomy is not any more beneficial than lumpectomies in dogs

Answer 18

T

Question 19

Advantage of OHE during Mastectomy

Answer 19

• protective against pyometra, metritis, estrus
• prevent unwanted litters
• dogs with benign tumors, potential decrease in the risk of new mammary tumors by 50%

Question 20

disadvantage of OHE during mastectomy

Answer 20

• additional surgery/cost
• Potential USMI
• for cats it not protective when performed at time of tumor removal

Question 21

complications of mastectomys

Answer 21

• pain
• inflammation
• blood loss
• seroma!!
• infection
• ischemia
• dehiscence (tension)
• hind limb edema (tension on lymphatics)
• tumor recurrence