Detailed Instructions: Given an abstract, generate a keyword (a noun phrase) that best describes the focus or contribution of the paper. Such keywords can be directly from the given abstract or outside it.
Problem:Abstract: We did complete histologic study on 148 gravid tubes and found that nearly 90% showed chronic lesions. CS was the most frequent lesion encountered (95.5%), followed by SIN (32.6%). Most frequently the lesions were extensive and both the ampulla and isthmus were involved. We therefore question the conservative approach in the treatment of certain TPs.
Solution:
Chronic Disease