Fig. 17
From: Primary myelofibrosis: spectrum of imaging features and disease-related complications
99mTc Tc-99 m isotope HDP nuclear bone scan in a different patient demonstrates an appearance approaching a ‘superscan’ appearance due to intense skeletal tracer distribution. This case also provides a clue to the cause of skeletal uptake: note that the left kidney has been displaced inferiorly by an enlarged spleen from marked splenomegaly (black arrow). 99mTc-99 m nuclear bone scans may be helpful in identifying marrow presence in extramedullary sites of haematopoiesis