Ethylenediaminetetraacetic acid-dependent pseudothrombocytopenia (EDTA-PTCP) is an in vitro phenomenon characterizedthe clustering of platelets following the use of EDTA as an anticoagulant, leading to a decreased analyzerplatelet count in a complete blood count (CBC). This report is a description of the case of a 47-year-old male patient admittedto a neurosurgery clinic with the complaints of back and leg pain. A neurological examination and lumbar magneticresonance imaging revealing extruded disc herniations led to a decision to perform surgery. Thrombocytopeniawas detected in the preoperative testing of the patient. The CBC was reanalyzed using citrate. Peripheral blood smearsof the patient collected using citrate and EDTA were compared. Thrombocytopenia was not detected in a CBC of thecitrated sample and the peripheral smear did not reveal platelet clusters. Pseudothrombocytopenia was considered, asthe anamnesis, physical examination findings, and coagulation tests of the patient were not consistent with thrombocytopenia.In conclusion, EDTA-PTCP was diagnosed during the preoperative evaluation of the patient.