Introduction & Objective: Hodgkin lymphoma accounts for about 1% of all cancers. Cyclooxygenase 2 (COX2) is a cytoplasmic enzyme. Oncogene, and growth factor induce over expression of COX2. COX2 is apoptotic inhibitor. Mutation of the p53 tumor suppressor gene represents the most common genetic alternation in human tumors. This study aimed to evaluate the expression of COX2 and p53 in subtypes of Hodgkin's lymphoma.

Materials & Methods: In this cross- sectional study,62 Hodgkin's lymphomas were studied in admitted samples of pathology departments of Hamadan hospitals before 2005.Age,sex and type of HL were recorded in each case. p53 and COX2 expression was investigated immunohistochemically and expression intensity. The comparison of p53 and COX2 between subtypes of HL was evaluated with SPSS v13 soft ware and chi-square test.

Results: The mean age of the patients of HL was 41±16 and 79% if HL immunoreactive for p53. In this study the mean age of the patients of HL who died was more than the mean age of the patients of HL who survived which is statistically considered significant (P<0.003). 24% of the patients of HL were immunoreactive for COX2.

Conclusion: Regarding to p53 and COX2 in subtypes of HL and insignificant difference in p53 and COX2 expression between subtypes of HL. We concluded that p53 and COX2 have not an important role in the prognosis of HL, but it is recommended to do more universal studies in the immunohistochemical level of P53 and COX2 to attain perfect results.

Introduction: Pulmonary tuberculosis (TB) is caused by the bacteria Mycobacterium tubercu-losis (MT). Rare cases of pulmonary thromboembolism along pulmonary or extra pulmonary TB were reported during the first weeks of anti-tuberculosis therapy.

 Case Report: A 28-year-old woman was admitted with complaints of ankles pain, fever, noc-turnal sweating, dyspnea and productive coughs. Patchy consolidations were seen on her chest x-ray and three sputum positive acid-fast bacillus (AFB) smears were reported in her investigations. The patient underwent anti-tuberculosis drugs and her clinical condition was improving while at the eight day of the treatment, the patient conditions suddenly deterio-rated and suffered from severe dyspnea, chest pain and haemoptysis. Moreover, sinus tachy-cardia with T waves inversion in precordial leads (V1-V3) were seen on the electrocardio-gram. Diagnosis of pulmonary thromboembolism was confirmed on computed tomography contrast angiography. In addition, echocardiography and color Doppler sonography of the lower extremities were normal. There was no evidence for hypercoagolopathy impairments in the patient. The patient was treated with warfarin and anti-tuberculosis drugs for six months, and she was completely cured and became smear negative at the end of the therapy.

Conclusion: As a result, although pulmonary thromboembolism is a rare complication of TB it should be considered in the patient with TB particularly during the first weeks of anti-TB treatment when respiratory symptoms exacerbations occur.

Introduction & Objective: The most common site of involvement in TB is the lungs. TB involves different parts of the lungs and has variable radiologic features. The aim of this study was to compare radiologic sequels between smear positive and smear negative pulmonary tuberculosis patients (PTPs).

Materials & Methods: In an analytic cross-sectional study, 63 pulmonary tuberculosis patients who referred to Farshchian hospital and Health center in Hamadan from March 2012 to September 2014 were enrolled.  Demographic data, clinical manifestations of the patients (smear positive and smear negative), sputum smear results and imaging reports were gathered. In additional, clinical manifestations and radiological findings of the patients were evaluated at the end of the treatment. Thirty two patients remained until the end of the study.

Results: Sixty three patients with mean age 56.85±24.20 were enrolled among that 68.25% of the patients were men and 31.75% were women. Forty four (69.84%) of the patients were smear positive and 19 (30.16%) of them were smear negative. Sputum was seen in smear positive patients more than smear negative patients. At the beginning of the treatment, the most common pulmonary involvements in imaging among the smear positive patients were reported to be nodular infiltration and fibrotic changes, but at the end of the treatment it was found to be atelectasis. However,in the smear negative patients the involvements were alveolar consolidation, nodular infiltration, pleural effusion, ground glass patterns and lymphadenopathy, and at the end of the treatment, fibrotic changes and reduction of pulmonary volume were seen. At the end of the treatment, 54.5% of smear negative patients and 85.7% of smear positive patients had abnormal imaging.

Conclusion: At the end of the treatment, abnormal findings on diagnostic imaging were observed in both smear positive and negative patients (more than 50%). Knowledge of common and various imaging findings in smear positive and smear negative patients can be helpful for early diagnosis of pulmonary tuberculosis.