Please assess the completion status of the following clinical trial:

Trial Title: Ductal Lavage Versus Corticosteroids Therapy for Idiopathic Granulomatous Mastitis

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Female, age between 18 and 65 years old.~* Inform consent signed.~* Clinical diagnosis of non-lactating mastitis, defined as mastitis occurred more than 1 month after the cessation of lactation.~* Clinical and pathological diagnosis of idiopathic granulomatous mastitis.~* Never receive surgical treatments, or corticosteroids therapy after the cessation of lactation. Core needle biopsy is allowed.~* Good health, judged by clinicians, to receive ductal lavage.~* M score \>=2~Exclusion Criteria:~* Grade III inverted nipple(Plastic. Reconstruction. Surgery. 104: 389, 1999.)~* Lactational mastitis patients.~* Bilateral IGM patients.~* Clinically diagnosis of periductal mastitis.~* Pathological diagnosis of breast carcinoma.~* Pregnant women.~* Evidences suggest possible diagnosis of SLE(systemic lupus erythematosus), rheumatic disorders or other systematic auto-immune diseases.~* Evidences suggest possible diagnosis of tuberculosis.~* Evidences suggest possible diagnosis of fungus infection of the breast~* History of breast trauma.~* History of taking oral corticosteroids or anti-tuberculosis treatment.~* Imaging examinations indicates foreign objects retained in the breast~* Presence of sepsis or severe inflammation caused by IGM, for which surgery is likely required.~* Patients with inappropriate coagulation function, cardiac function, pulmonary function, liver and renal function, that clinicians judges as not suitable to participate in this study.

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- Ductal lavage (Type: EXPERIMENTAL): Ductal lavage and breast massage for two weeks.
- Corticosteroids therapy (Type: ACTIVE_COMPARATOR): Oral corticosteroids therapy for 6 months.

Based on this trial design, predict the completion outcome and termination type (if applicable).