Councilman body

**Definition:** Councilman bodies (also called Councilman-Rocha Lima bodies or acidophilic bodies) are apoptotic hepatocytes. On H&E they appear as shrunken, intensely pink (hypereosinophilic) round globules with condensed or fragmented nuclear remnants (karyorrhexis) or no visible nucleus. They are often found lying free in the sinusoids or in the space of Disse.

**Pathophysiology:** - In viral hepatitis, hepatocytes display viral antigens on MHC class I. - CD8+ cytotoxic T cells recognize infected hepatocytes and kill them through perforin/granzyme and Fas–FasL pathways. - Granzymes activate caspases, causing apoptosis. The cell shrinks, the cytoplasm becomes hypereosinophilic, and the nucleus condenses and fragments. Apoptotic bodies are then extruded and phagocytosed by Kupffer cells. - Because apoptosis does not trigger the same inflammatory response as necrosis, the cell is removed without rupture.

**Clinical significance and associations:** - **Acute viral hepatitis (A, B, C, E):** Classic board association. The histology also shows lobular disarray, ballooning degeneration (swollen, pale hepatocytes), spotty (focal) necrosis, and lymphocytic portal and lobular infiltrate. Kupffer cells are hyperplastic. - **Yellow fever:** Councilman bodies are prominent, with midzonal (zone 2) necrosis. This is the origin of the name, since Councilman first described them in yellow fever. Yellow fever is also associated with Torres bodies (intranuclear inclusions). - **Other settings:** Ebola, Lassa, and Crimean-Congo hemorrhagic fever, other hepatitic injuries, and graft-versus-host disease or drug-induced liver injury. They are not specific to any one cause. - **Clinical correlation:** The clinical picture includes jaundice, elevated AST and ALT (often in the thousands), malaise, and RUQ pain.

**High-yield distinctions:** - **Councilman body:** apoptotic hepatocyte (eosinophilic) in viral hepatitis and yellow fever. - **Mallory-Denk body:** eosinophilic cytoplasmic aggregates of damaged keratin intermediate filaments in alcoholic hepatitis (also seen in NASH, Wilson disease, and primary biliary cholangitis). - **Ground-glass hepatocytes:** chronic hepatitis B (HBsAg accumulation in the endoplasmic reticulum). - **Piecemeal necrosis (interface hepatitis):** chronic hepatitis. - **Bridging necrosis:** severe acute or chronic hepatitis. - **Torres bodies:** intranuclear inclusions in yellow fever.

**Mnemonic:** Councilman = "Counsel the cells to commit suicide" (apoptosis), and the pink dead cell sits in the sinusoid.