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Dengue fever complicated by pulmonary haemorrhage manifesting as haemoptysis.

A 17-year-old girl was admitted to hospital with dengue fever. On the ninth day of fever she developed haemoptysis and chest X-ray changes consistent with haemorrhage in her lungs. Thrombocytopaenia and mild coagulopathy were the most likely cause of this unusual haemoptysis in this patient. Investigations excluded other causes for the haemoptysis.