The traditional Japanese medicine, Keishi-ka-shakuyaku-daio-to is administered to patients with symptomatic pneumatosis cystoides intestinalis (PCI) as compared with lactomin for 8 weeks.

1. Based on endoscopic finding, patients with symptomatic PCI are recruited.
2. After enrollment, abdominal symptoms are evaluated and abdominal CT is performed.
3. Patients were randomized in a 1:1 ratio in blocks of 4 to undergo either the traditional Japanese medicine or lactomin (control). Randomization was carried out by computer-generated random sequences.
4. The traditional Japanese medicine, Keishi-ka-shakuyaku-daio-to（TJ-134, 7.5g/day), which consists of a mixture of a compound of peony root (6 g), cinnamon bark (4 g), jujube (4 g), glycyrrhiza (2 g), rhubarb (2 g), and ginger (1 g) or lactomin (3g/day) is administered to enrolled patients for 8 weeks.
5. After the administration of each drug for 8 weeks, abdominal symptoms are evaluated and abdominal CT is performed again.

Inclusion Criteria:

• typical findings of PCI on colonoscopy; Line or pebble like sessile cysts are distributed around the colon with normal overlying mucosa

Exclusion Criteria:

• patients can not take Keishi-ka-shakuyaku-daio-to（TJ-134）