Mammary Tumor Removal (AU)

Removal of large and small mammary tumors from a 2.5 year old female rat.
Complete procedure duration: 60 minutes

Surgery performed by:
Dr. Peter Field B.V.S.C. (Hons.) M.A.C.V.Sc.
Member of the Australian College of Veterinary Scientists by examination in Canine Medicine
Veterinary Physician and Surgeon, Everton Hills Veterinary Surgery, Everton Hills, BrisbaneQld, Australia
and
Surgical Assistant:
Mrs Louise Dux, Certified Laboratory Animal Technician

*Note: It is Dr. Peter Field’s preference to use an approved surgical hand scrub, rather than surgical gloves, to maintain aseptic technique with small animals.

Click on a photo to enlarge it.

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tumour_removal_01

A 2.5 year old intact female rat brought into clinic for removal of small mass in the left thoracic area and large mass in the right lateral abdominal region.


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tumour_removal_02

Smaller mass seen in the left thoracic area below forelimb.


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tumour-removal-03

Larger mass seen at right lateral abdominal region.


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tumour_removal_04

The rat is placed in an anesthetic induction chamber where she is given 3% isoflurane for sedation. The brown pad below the chamber is a heating pad that the rat will remain on throughout the procedure to maintain ambient body temperature, and prevent hypothermia.


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tumour_removal_05

Sedation is maintained using mask.


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tumour_removal_06

Shave prep of surgical sites is being done at both left thoracic area and the right abdominal region.


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tumour_removal_07

Draping maintains sterile technique at the surgical site. The scalpel is drawn along the line of the incision.


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tumour_removal_08

Small tumor is being gently lifted with forceps.


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tumour_removal_09

Forceps holding small tumor .


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tumour_removal_10

Surgeon cutting through connective tissue.


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tumour_removal_11

When cutting connective tissue the surgeon must take care not to inadvertantly sever any blood vessels supplying the tumor.


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tumour_removal_12

As the blood vessels are located they are clamped to prevent bleeding.


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tumour_removal_13

The 2.5 cm tumor removed from the left thoracic area. Gross appearance is that of a mammary fibroma. Histopathology was declined by owner.


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tumour_removal_14

Wound closure and suturing of surgical site where the tumor was removed.


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tumour_removal_15

Suturing completed.


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tumour_removal_16

Surgical site of large tumor prepped with an approved betadine surgical scrub, and minimal alcohol wipe.


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tumour_removal_17

With the draping in place, the surgeon draws the scalpel along the line of incision.


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tumour_removal_18

Blunt dissection between tissue planes.


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tumour_removal_19

Surgeon pulls connective tissue away from mass.


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tumour_removal_20

Surgeon cutting connective tissue to resect tumor.


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tumour_removal_21

Small area of cauterized blood vessel by tip of clamp.


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tumour-removal-22

Clamping of blood vessel.


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tumour_removal_24

Resection of tumor continues.


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tumour-removal-25

Continuing to cut connective tissue.


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tumour_removal_26

Clamping more blood vessels. It is not unusual for large tumors to have multiple blood supplies.


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tumour_removal_27

The 5.5 cm tumor removed from the right lateral abdominal region. Gross appearance is that of a mammary adenoma. Histopathology was declined by the owner.


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tumour_removal_28

Wound closure and initial suturing of site.


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tumour_removal_29

Suturing of surgical site.


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tumour_removal_30

Suturing completed.


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tumour_removal_31

While awakening from anesthesia the rat is given oxygen.


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tumour_removal_32

The rat has been placed back into the induction chamber for recovery where she is provided with additional warmth and oxygen.


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tumour_removal_33

She was then placed in a small hospital cage until healing was progressed enough for her to return to her usual environment.


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