Pulmonary epithelioid haemangioendothelioma in 21 patients, including three with partial spontaneous regression

This investigation studied the general conditions and prognostic factors of pulmonary epithelioid haemangioendothelioma (PEH), which is a rare disease. Twenty-one patients were collected throughout Asia by a questionnaire. Age at the detection or onset of symptoms of PEH was 14-64 yrs (mean 44 yrs). Males were more likely to be detected by symptoms (4/8, 50%) than were females (1/13, 8%). Fifteen showed bilateral multiple nodular opacities. Partial spontaneous regression occurred in three asymptomatic patients (one male and two females, all with bilateral multiple nodular opacities) 5, 13 and 15 yrs after detection. Two of the three patients with pleural effusion died within 1 yr, while the 16 patients with no effusion were alive more than 1 yr later (p<0.05). Histologically, two patients with fibrinofibrous pleuritis and extrapleural proliferation of tumour cells died within 2 yrs, while only one of 14 patients lacking such manifestations died within the same period (p<0.05). All three patients without spindle tumour cells survived for 12 yrs after the diagnosis, while all four patients with such cells died during the same period (p<0.05). In conclusion, 21 patients with pulmonary epithelioid haemangioendothelioma were reported, of whom three demonstrated partial spontaneous regression, and adverse prognostic features were identified.