Periductal Mastitis: An Inflammatory Disease Related to Bacterial Infection and Consequent Immune Responses?

Table 2

Clinical characteristics and presentations of patients with PDM.

Characteristic	Value
Mean size of mass (cm)
Affected sides
Right	34 (39.08)
Left	45 (51.72)
Bilateral	8 (9.20)
Quadrant(s)
Upper-outer	20 (22.99)
Lower-outer	8 (9.20)
Upper-inner	9 (10.34)
Lower-inner	9 (10.34)
Two or more quadrants	15 (17.24)
Subareolar region	26 (29.89)
Clinical presentation
Mass without pain	63 (72.41)
Mass with pain	15 (17.24)
Erythroswelling	31 (35.63)
Nipple discharge	6 (6.90)
Sinus	12 (13.79)
Nipple retraction	24 (27.59)
Biopsy methods
Incisional or excisional biopsy	24 (27.59)
Vacuum-assisted biopsy	63 (72.41)

Note. Data are number (%) of patients, unless otherwise indicated.