“…Others have reported elevated levels of LDII activity in serum in myocardial infarction (8,13,14,15), hepatic disorders (7,17) and various haematological disorders (1,7). Several workers (2,16) have observed that malignant effusion fluid has a higher LDII level than corresponding serum and some have studied LDII activity in spinal fluid (4,5), gastric juice (10) and urine (12).…”