Increased Mast Cell Counts and Degranulation in Microscopic Colitis

Table 3

Mast cell counts by tryptase immunohistochemistry.

	Highest count/HPF			Lowest count/HPF
	LP	MM	SM	LP	MM	SM
Control ()	23 (10–37)	1 (0–1)	10 (3–22)	12 (3–25)	0 (0–1)	6 (3–11)
CC ()	39 (19–63)	1 (0–3)	15 (4–37)	20 (8–45)	0 (0–1)	8 (1–25)
LC ()	30 (13–42)	1 (0–3)	12 (3–26)	17 (6–27)	0 (0–1)	7 (0–21)

Values are presented as mean (range). , vs. control (Student’s -test). HPF: high-power field; LP: lamina propria; MM: muscularis mucosae; SM: submucosae; CC: collagenous colitis; LC: lymphocytic colitis.