RESUMEN
OBJECTIVE: To compare differences in demographics and outcomes in childhood Hodgkin lymphoma (HL) presenting at the Children's Hospital Lahore (CHL), and Royal Marsden Hospital (RMH), UK. STUDY DESIGN: An observational comparative study. PLACE AND DURATION OF STUDY: From January 2011 to February 2012 at CH, Lahore and from October 2008 to February 2012 at RMH, UK. METHODOLOGY: Consecutive HL patients (50 from each hospital) were inducted. Data regarding age, gender, staging, histopathology and outcome were analysed. Clinical and pathological staging done according to Ann-Arbor and World Health Organization classification. Treatment duration was 6-8 months. They were followed for 6 months post-treatment. Frequencies of variables were noted and compared. Chi-square test was used for determining significance. RESULTS: Patients from Children's Hospital, Lahore were younger (mean 7.9 years) with male predominance (n=42, 84%). Histopathology showed Mixed Cellularity (MC) in 32 (64%), Nodular Sclerosis (NS) in 5 (10%), Lymphocyte Rich in 4 (8%) and lymphocyte depleted in 1 (2%), nodular lymphocyte predominant (NLP) in 1 (2%) each. Majority presented in stage IV (n=25,50%), or stage III (n=20,40%). Constitutional B symptoms were present in 37 (74%). Bone marrow involvement observed in 23 (46%). Remission was achieved in 42 (84%) patients; 2 (4%) relapsed, 4 (8%) expired and 2 (4%) left against medical advice. In contrast, RMH patients were older (mean 11.8 years.) and 30 (60%) were males. NS (n=40,80%) and NLP (n=6,12%) types were predominant. Two (4%) patients were in stage I, 27 (54%) in stage II, 12 (24%) in stage III and 9 (18%) presented in stage IV. Fourteen (28%) had B-symptoms. None had bone marrow disease. Event free survival was 46 (92%). Four (8%) patients relapsed. Three responded to second line therapy and one relapsed postautologous transplant. CONCLUSION: Significant differences were observed in age at presentation, stage, histopathology and extent of bone marrow involvement between the groups. Of interest is the bone marrow involvement in stage IV patients in Pakistan. Delayed diagnosis account for advanced stage but difference in pathological subtype needs further study.
