Objective: To present two cases of Mondor's disease of the breast resulting from jellyfish stings in Western Australia.
Clinical features: A 30-year-old Caucasian woman presented with a palpable thickened cord in her right breast. The straightness of the cord suggested a thrombosed lymphatic. A 50-year-old Caucasian woman presented with an obvious palpable cord extending most of the length of her left breast. Mammography demonstrated no abnormality. Both women reported having been stung by jellyfish a month earlier.
Intervention and outcome: As Mondor's disease is a benign, self-limiting disease, the patients were reassured and reviewed routinely. In each case, the condition settled spontaneously over a period of several weeks.
Conclusion: Jellyfish stings should be recognised as an unusual variant of the numerous causes which have been described for Mondor's disease.