Background: Bone marrow aspiration (BMA) is a minimally invasive technique performed in a variety of hematological disorders. It is considered essential for the diagnosis and management of haematological disorders. BMA is usually sufficient to diagnose nutritional anemia and most of the leukemias.
 Aims & Objectives: To study the spectrum of hematological disorders diagnosed on BMA in a tertiary care centre, Udaipur.
 Material & Methods: The present study was conducted in the hematology section of department of Pathology, RNT Medical College & MB Hospital, Udaipur for a period of one year from June 2018 to May 2019. A total of 123 cases of suspected hematological disorders underwent the process of BMA from posterior superior iliac spine under local anesthesia. Exclusion criteria of our study included aspirates of dry tap. BMA smears were stained with Giemsa stain for morphologic examination.
 Result: The present study included 123 cases. Male to female ratio in our study was 1.6:1. Anemia (45.5%) was the most common hematological disorder in our study, iron deficiency anemia being the most common followed by megaloblastic anemia. Chronic myeloid leukemia (26.01%) was the most common hematological malignancy in our study.
 Conclusion: Bone marrow aspiration is a useful diagnostic procedure in hematological practice for the diagnosis of both hematological and non-hematological conditions. Rapid and early diagnosis of malignancies are critical for proper initiation of treatment and to control the disease.
 Keywords: Bone Marrow Aspiration, Hematological disorders, Leukemias