Fistula-in-ano, an investigation of human foetal anal ducts
and intramuscular glands and a clinical study of 150 patients.
When problems are manifested by scooting or persistent licking of the anus, however, they usually have to do with the consistency of the glandular secretions or the anatomical structure of the anal ducts
, says Dr.
(7) In addition, the anal ducts that drain anal glands open in the ATZ (Figure 3).
Although the original WHO classification listed this tumor under the category "adenocarcinoma of anal glands," these tumors may actually arise from or be related to anal ducts that drain the anal glands, and may therefore be more appropriately termed anal duct adenocarcinoma.
Most tumours present as fungating or ulcerating lesions but the tumour may arise in anal ducts
and present as submucosal mass.