Mallory bodies (MBs) are hyaline inclusions found in a variety of
liver diseases. Because the major components of MBs are cytokeratins (CKs), CK profiles of MBs were examined immunohistochemically in 37 autopsied liver specimens (including a variety of nontumor pathological livers and
hepatocellular carcinomas), using 13
antibodies against specific CKs: 34betaB4 (CK 1), OV-TL12/30 (CK 7), 34betaH11 (CK 8),
LHP1 (CK 10), KS-1A3 (CK 13), LL002 (CK 14), LHK15 (CK 15), LL025 (CK 16), E3 (
CK 17), DC10 (CK 18), b170 (CK 19), Ks20.8 (CK 20), and 34betaE12 (CKs 1, 5, 10, and 11). Positive staining rates of MBs in 37 cases were as follows: CK 8, 100% (37/37); CK 18, 100% (37/37); CK 19, 57% (21/37). CK 7, 49% (18/37); CK 20, 35% (13/37); CK 1, CK 5, CK 10, CK 11, CK 13, CK 14, CK 15, CK 16, and
CK 17 were all negative in MBs. CK expression patterns in MBs found in
tumor or non-
tumor hepatocytes was basically similar. Thus, all present MBs were composed of similar material with common
antigenic determinants, regardless of underlying disease; in particular, they consistently contained CK 8 and CK 18, and frequently contained CK 7, CK 19, and CK 20.