(redirected from anal canal)
Also found in: Dictionary, Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to anal canal: hemorrhoids, appendix, Ischioanal fossa

CANAL. A trench dug for leading water in a particular direction, and confining it.
     2. Public canals are generally protected by the law which authorizes their being made. Various points have arisen under numerous laws authorizing the construction of canals, which have been decided in cases reported in 1 Yeates, 430; 1 Binn. 70; 1 Pennsyl. 462; 2 Pennsyl. 517; 7 Mass. 169; 1 Sumu. 46; 20 Johns. 103, 735; 2 Johns. 283; 7 John. Ch. 315; 1 Wend. 474; 5 Wend. 166; 8 Wend. 469; 4 Wend. 667; 6 Cowen, 698; 7 Cowen, 526 4 Hamm. 253; 5 Hamm. 141, 391; 6 Hamm. 126; 1 N. H. Rep. 339; See River.

References in periodicals archive ?
It is a vertical superficial tear in anal canal just starting from anal verge and extending upward involving anoderm.
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.