🧬 Immunohistochemistry (IHC) 101 — Part 1 The process in a nutshell IHC helps us identify specific antigens in tissue sections using antibodies. Basic flow: 🔹 Fixation & processing 🔹 Antigen retrieval 🔹 Primary antibody binding 🔹 Detection & visualization 🔹 Interpretation ⚠️ But what if the IHC stain goes wrong? ❌ Weak or no staining ❌ High background / nonspecific staining ❌ False positives or false negatives Most issues trace back to pre-analytical errors, antibody selection, retrieval m