Question: Patient of 74 years of age, asymptomatic, who in a routine analysis presents platelets 40,000 platelets / μL, the remainder being the normal blood cell count and the complete normal biochemistry. Point out the correct answer: 
 Options:  <1> The most likely diagnosis is an Idiopathic Thrombocytopenic Purpura and steroid treatment should be started as soon as possible. <2> It is a serious thrombocytopenia with a high risk of spontaneous bleeding. <3> A peripheral blood smear should be performed to rule out pseudotrombocytopenia or spurious thrombocytopenia before further measurements are made. <4> The most probable diagnosis is that of a myelodysplastic syndrome, so the initial test to be performed would be a bone marrow study. <5> An initial study should be performed with viral serologies, autoimmunity study and abdominal ultrasound. If all these tests were normal, the study should be completed with a peripheral blood smear.
3