Introduction: There are various disorders in formation of blood in body. Bone marrow is one of them which involved variety of hematological and nonhematological disorders. Hematological disorders include myeloproliferative neoplasm (MPN), acute leukemia, hemato-lymphoid neoplasm and nutritional deficiency diseases whereas nonhematological disorders include infectious diseases infiltrating the bone marrow such as parasitic infections, tuberculosis and metastatic deposits. Bone marrows present various diseases with various clinical symptoms with the involvement of blood but peripheral blood picture alone does not reflect the nature of disease process. Depending upon the suspected diagnosis from clinical features and peripheral blood examination, that indication for bone marrow examination can be done. Examination of Bone marrow is useful in the diagnosis of both hematological and non-hematological disorders. The most important techniques used for the diagnosis of hematological disorders are trephine biopsy and bone marrow aspiration. For the interpretation of the disorder of bone marrow history, clinical finding, peripheral blood picture and other laboratory findings are required. Usually Bone marrow aspiration (BMA) alone is sufficient for the diagnosis of nutritional anaemias, most of the acute leukaemias and Immune thrombocytopenias. Diagnosis such as Trephine biopsy provides important diagnostic information myelofibrosis, granulomatous disease and bone marrow infiltration. Bone marrow aspiration is useful in making out better individual cell morphology whereas biopsy is useful in bone marrow architectural pattern and distribution. Bone marrow is nor mocellular or hypercellula resulting from ineffective hematopoiesis, increased peripheral destruction and bone marrow invasion. Therefore, bone marrow examination is extremely helpful to identify the cause of pancytopenia.
Aim: The main aim of this study is to evaluate the cytological and histological pattern of various hematological disorders in bone marrow aspiration and trephine biopsy respectively.
Material and Methods: During the period of 1 year 100 patient with the cases of haematological disorders were included in this study. Routinely stain like Leishman stain is used for bone marrow aspiration. Haematoxylin and eosin stain is also used for trephine biopsy. For all the cases reticulocyte count, peripheral smears, sickling test and complete hemogram were done. Special stains PAS Stain (Periodic acid schiff) was done for all ALL, AML and gauchers disease. In ALL cases Block positivity is shown. In gauchers disease, a gaucher cell shows wrinkled tissue paper appearance with PAS positivity. Reticulin stain was done in myelofibrosis and metastatic deposits. In myelofibrosis, trephine biopsy shows increase in reticulin network with coarse fibrils.
Result: In all the cases bone marrow aspiration was done and among them 40 cases trephine biopsy were done. Out of total patients 57 were male and 43 were female. And the mean age was found as 32.6 years. The findings of the bone marrow were examination. At the time of study period 50% of the study have anemias and they are predominantly megaloblastic followed by aplastic/ hypoplastic anemias. Other three cases include two metastatic deposits and one storage disorder (Gaucher’s Disease).
Conclusion: Bone marrow examination is important to diagnosis, prognosis or evaluate therapeutic response for a variety of hematologic and non-hematologic problems. Nowadays, Bone marrow aspiration & bone marrow biopsy are used routinely as diagnostic procedures because it is easier and does not require advance equipments. Therefore both the procedures are complementary to each other which are helpful in further investigation and management.
Keywords: Bone marrow aspiration, Trephine biopsy, Pancytopenia, Megaloblastic Anemia
Comparison of bone marrow aspiration cytology with bone marrow trephine biopsy histopathology: An observational study