What are the typical features of a chronic anal fissure?

A chronic anal fissure typically presents with a distinct set of features that can help in its diagnosis. The correct choice highlights the characteristic findings associated with chronic fissures.

In the case of a chronic anal fissure, one would observe an ulcer, which is the fissure itself that has not healed properly. The presence of a sentinel pile is also a notable finding; this is an external tag of skin that often develops at the anal verge in response to the fissure. Additionally, enlarged anal papillae can be seen in chronic cases as a consequence of the chronic inflammatory changes and irritation in the area.

These features collectively provide a clear indication of a chronic anal fissure. Together, they illustrate the ongoing pathological condition where a simple tear has progressed to a problematic and recurrent issue, characterized by these visible anatomical changes. Other choices may present symptoms or features that are either nonspecific or associated with different conditions, thus reinforcing the accuracy of the chosen correct features related to chronic anal fissures.