Nodular sclerosing classical Hodgkin lymphoma masquerading as acute suppurative-necrotizing lymphadenitis.

The diagnosis of nodular sclerosing classical Hodgkin lymphoma (NSCHL) by fine-needle aspiration (FNA) biopsy has historically been a diagnostic challenge due to the usual paucicellularity of the specimen. This case report, and other previously published reports, suggests that there is another facet to the potentially challenging diagnosis of this particular variant of Hodgkin lymphoma (HL): the presence of suppurative-necrotizing changes mimicking an infectious etiology. The patient presented here underwent FNA biopsy of an acutely enlarged supraclavicular lymph node and cytologic smears showed marked acute inflammation in a background of necrosis. A diagnosis of infectious suppurative lymphadenitis was made at that time. After a negative infectious work-up with infectious disease consultation, an excisional biopsy was performed and the patient was definitively diagnosed with NSCHL. The presence of neoplastic Hodgkin and Reed-Sternberg cells in the purulent exudate was minimal and only appropriately identified after retrospective review. This particular subtype of classical HL represents a potential pitfall in FNA biopsy cytology. Consequently, the cytopathologist and surgeon should always consider this entity in the differential diagnosis of a suppurative, lymphadenitis-like aspirate, and pursue repeat FNA or an excisional biopsy if there is any clinical index of suspicion.