Value of 99mTc-labelled red cells in the detection of pulmonary haemorrhage

The use of 99mTc-labelled red cells is very extensive in the detection of haemorrhages of gastrointestinal origin. However, not only is it useful in haemorrhages in this location, but it may also be of use in other locations such as pulmonary haemorrhage. We should not forget that this is a non-invasive diagnostic method, useful in localising possible pulmonary bleeding which causes symptoms of haemoptysis, without having to resort to invasive tests such as angiography, or prior to this, to have approximate knowledge of the location of the bleeding area. We present the case of a patient with a haemoptysis picture where the use of scintigraphy with labelled red cells detected the location of the bleeding site, directing towards subsequent surgery, and a final diagnosis of haemoptysis due to pulmonary carcinoma.