It is a vertical superficial tear in
anal canal just starting from anal verge and extending upward involving anoderm.
A track connecting the
anal canal to the skin around the anus.
The grade of the hemorrhoids and the involvement of quadrants of the
anal canal were determined by preoperative rectal examination.
One patient with an
anal canal adenocarcinoma underwent conventional APE, and one patient with
anal canal melanoma underwent ELAPE.
When the internal sphincter relaxes, the external sphincter contracts to keep the
anal canal closed and delay defecation until a socially appropriate time and place are available (Palit et al.
Next, she asked the patients to perform a series of ten 5-second contractions of the
anal canal, and checked that the contractions were done through the
anal canal sphincter not though the buttock muscles.
It demonstrated a presacral mass, sickle-shaped sacral defect, coccyx agenesis, and a fistulous tract between the sacral canal and the
anal canal (Figure 3).
The transitional epithelium of the urogenital aspect of the cloaca can be retained in the anal glands at the border of the pectinate line, thus explaining the presence of transitional epithelium in the
anal canal [8, 26].
Alternatively, the object can be carefully dislodged from the
anal canal by freeing one of the impacted ends.
Where HRA is not available, the DARE can identify subclinical masses by palpating the
anal canal, and can be used as an effective screening tool for both anal and prostate cancers.
However, it is important for pathologists to consider syphilis as a part of their differential diagnosis for biopsy specimens taken from isolated
anal canal ulcers or inflammatory anal mass lesions when certain histologic features are recognized.
Women who joined the anal HPV study never had anal cancer and agreed (1) to give an anal swab specimen for HPV testing, and (2) to undergo high-resolution anoscopy, a procedure that provides a magnified view of the
anal canal.
