<p>Updates on the diagnostic workup for IBD, emphasizing the &quot;immigration effect&quot; as proof of environmental triggers. We clarify phenotypic mimics to avoid surgical disasters, such as distinguishing &quot;backwash ileitis&quot; and the &quot;cecal patch&quot; from Crohn&#39;s disease. The session covers the crucial Rutgeerts score for post-op recurrence (treating an i2 score), the utility of fecal calprotectin (&lt;50 to rule out inflammation), and the new terminology replacing DALM: visible vs. invisible dysplasia.</p>