The researchers found five different sub-types of HL among the patients studied: 247 cases of the
nodular sclerosis (NS) type, in which the tumour nodules are large; 105 of mixed cellularity, where a mixture of different types of inflammatory cells are involved; 58
lymphocyte rich, the sub-type with the best outcome; 68 «others»; and 143 «not otherwise specified» (NOS).