| focal appendicitis | Acute appendicitis involving only part of the appendix, sometimes at the site of, or distal to, an obstruction of the lumen. (05 Mar 2000) |
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| left-sided appendicitis | Appendicitis occurring on the left side of the abdomen, usually the left-lower quadrant, due to abnormal rotation of the gut (such as situs inversus). (05 Mar 2000) |
| lumbar appendicitis | A retrodisplaced appendix in the lumbar region. (05 Mar 2000) |