Medical checkups for students are provided every year at
Hiroshima University, and 8,850 students visited the Health Service
Center between April and May 1998. Three cases of PSP were detected by
examining indirect chest radiographs (width, 100 × 100 mm) of 8,841
students (men, 5,357; women, 3,484). The three students with PSP were
men with the following characteristics: age, 18, 19, and 20 years (mean
and median among the total male students examined were 21.4 and 21.0
years, respectively [n = 5,357]); height, 1.80, 1.72, and 1.70
m (mean, 1.72 m; median, 1.72 m [n = 4,924]); and body
mass index (BMI), 22.4, 17.3, and 17.3 (mean, 21.5; median, 21.1[
n = 4,924]), respectively. Two of the students had never smoked.
The detailed history, obtained after diagnosis, revealed that two of
the subjects had noticed chest pain around the time of their checkup.
These two subjects showed spontaneous improvement on chest radiographs
taken 2 to 3 weeks after diagnosis, while the remaining subject
with massive pneumothorax (Fig 1
) was admitted to a hospital for aspiration treatment.