RECTUS-ABDOMINIS RHABDOMYOLYSIS AFTER SIT UPS - UNEXPECTED DETECTION BY BONE-SCAN

Uptake of technetium-99m methylene diphosphonate by the rectus abdomin is muscle was unexpectedly found in a 29 year old man who had started to perform 30 to 40 sit ups a day for five days before the bone scan. After a week of rest, serum creatine kinase activity was still abnorma l but muscle uptake of technetium-99m methylene diphosphonate had ceas ed. This specific muscle injury after short term sit ups as well as th e resolution of the phenomenon within a week are of interest.