Page 206 - Manual of Equine Field Surgery

CHAPTER 36

Circumcision

Joanne Kramer

performed when lesions are located anywhere

INDICATIONS from the internal lamina of the external fold to the

inner lamina of the preputial fold.
Circumcision is indicated for removal of neoplas-

tic tissue, granulomas, or other masses from the

sheath (Figure 36-1). It is also indicated for PROCEDURE

removal of preputial scar tissue that prevents

penile retraction or extension. Two parallel circumferential incisions are made

around the prepuce proximal and distal to the

affected region (Figure 36-3). A plane of dissec-

EQUIPMENT tion is established deeper than the affected tissue

but superficial to the deep fascia of the penis. The

A tourniquet is optional. entire region between the circumferential inci-

sions is undermined and removed by creating a

longitudinal incision between the circumferential

POSITIONING AND PREPARATION incisions (Figure 36-4). Subcutaneous vessels may

require ligation. If a tourniquet has been used, it

The horse is positioned in dorsal recumbency

under general anesthesia. The penis is extended,

and the prepuce and shaft of penis are prepared

for aseptic surgery.

ANATOMY

The prepuce has two infoldings, which allow for

retraction of the penis into the preputial cavity.

The first of these infoldings is the external fold of

the prepuce consisting of the external lamina,

preputial ostium, and internal lamina. The

second infolding is the preputial fold consisting

of the outer lamina of the preputial fold, the Figure 36-1 Squamous cell carcinoma involving the

preputial ring, and the inner lamina of the prepuce. This lesion was removed successfully by
. .
.
preputial fold (Figure 36-2). Circumcision can be circumcision.

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