ABSTRACT
Hodgkin's lymphoma is a malignant neoplasm of B lymphocytes and less common T lymphocytes that morphologically can be mistaken with several benign and malignant diseases. These diseases have different course, treatments and prognosis from Hodgkin's lymphoma. Immunohistochemical staining is very useful that will aid in separating Hodgkin's Lymphoma from a series of benign and malignant lookalikes. We Randomly selected 53 cases with primary diagnosis of Hodgkin's lymphoma in pathology laboratory of Imam Reza Hospital from 1374-1384. to confirm or rule out of the primary diagnosis, microscopic evaluation and Immunohistochemical staining were done. Overall in 47 cases [88.7%], Hodgkin's lymphoma was confirmed and 6 cases [11.3%] were non hodgkin lymphoma.A total 5 cases were T cell Rich large B cell lymphoma and 1 case was anaplasic large cell lymphoma probably. In Hodgkin's lymphoma cases, the mean age was 40 years. Except for nodular sclerosis other types were more frequent in males. [M/F = 2.5].The commonest type was mixed cellularity [39 cases] [54.7%]. Misdiagnosis of Hodgkin's lymphoma without Immunohistochemical staining was 11.3%. Because of significant difference between treatment and prognosis of Hodgkin's lymphoma and other morphologically similar diseases, immunohistochemical staining particulary in lymphocytic depletion and nodular lymphocytic predominant Hodgkin's lymphoma, is necessary and recommended