Hodgkin lymphoma detection and survival: findings from the Haematological Malignancy Research Network

Maxine JE Lamb, Eve Roman, Debra A Howell, Eleanor Kane, Timothy Bagguley, Cathy Burton, Russell Patmore, Alexandra G Smith

Hodgkin lymphoma is usually detected in primary care with early signs and symptoms, and is highly treatable with standardised chemotherapy. However, late presentation is associated with poorer outcomes. To investigate the relationship between markers of advanced disease, emergency admission, and survival following a diagnosis of classical Hodgkin lymphoma (CHL). The study was set within a sociodemographically representative UK population-based patient cohort of ~4 million, within which all patients were tracked through their care pathways, and linked to national data obtained from Hospital Episode Statistics (HES) and deaths. All 971 patients with CHL newly diagnosed between 1 September 2004-31 August 2015 were followed until 18th December 2018. The median diagnostic age was 41.5 years (range 0-96 years), 55.2% of the patients were male, 31.2% had stage IV disease, 43.0% had a moderate-high or high risk prognostic score, and 18.7% were admitted via the emergency route prior to diagnosis. The relationship between age and emergency admission was U-shaped: more likely in patients aged <25 years and ≥70 years. Compared to patients admitted via other routes, those presenting as an emergency had more advanced disease and poorer 3-year survival (relative survival 68.4% [95% confidence interval {CI} = 60.3 to 75.2] versus 89.8% [95% CI = 87.0 to 92.0], respectively [P<0.01]). However, after adjusting for clinically important prognostic factors, no difference in survival remained. These findings suggest that CHL survival as a whole could be increased by around 4% if the cancer in patients who presented as an emergency had been detected at the same point as in other patients.