Fibrocystic breast changes
ICD-10 N60.1; N60.2; N60.3 · ICD-11 GB20.0

Fibrocystic Breast Changes When Evening Primrose Oil Has Not Controlled Mastalgia or Breast Nodularity

Fibrocystic breast changes present with breast pain (mastalgia) and nodularity. When first-line pharmacological therapy fails to produce adequate symptom control, a second-line protocol is indicated.

First-Line Treatment — Insufficient Response

Evening primrose oil (EPO) — or flaxseed oil as an alternative first-line agent — was used but did not achieve a good response in mastalgia (breast pain) or breast nodularity. Non-achievement of these targets is the escalation criterion for this protocol.

Next-Step Approach
For severe or refractory cases that have not responded to first-line agents, specific pharmacological therapies may be considered — though these are reserved for situations where simpler measures have failed, given the potential for significant side effects. The full regimen, selection criteria, and monitoring plan are detailed in the complete protocol.
Treatment Goal Alleviation of fibrocystic breast disease symptoms (breast pain), reassessed at 2 months
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References

Treatment with tamoxifen or danazol should be reserved for severe or refractory cases due to their serious side-effects.

Tamoxifen has shown good efficacy in cyclical mastalgia (in 90% cases) in controlled trials with fewer side effects with 10 mg daily dosage.

However, recommendations for danazol administration permit 100 mg twice daily for 2 months which may be increased to 200mg twice daily in case of no response with 100mg but should be discontinued if it still does not respond.

Only in severe or refractory cases, treatment with tamoxifen or danazol may be tried but with proper caution and a beforehand explanation to patient about the possible side-effects.

Studies have reported beneficial effects in alleviating FBD symptoms with dosage of 200 and 400 mg/day; response being early with higher dosage but with more side effects and relapse being quicker with lower dosage.

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