Mammogram second opinion: what BI-RADS 3, 4 and 5 mean and what to do next

Dra. Paulina Herrera · Breast Surgeon (Mastologist) and Gynecologist · Hospital Ángeles Valle Oriente, Monterrey, Mexico

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When a second opinion makes sense

You received a BI-RADS 3, 4 or 5 report and do not understand what it means; you were told to "wait six months" and are not comfortable; you have microcalcifications or dense breasts; or you want a breast specialist —not only a radiologist— to decide the next step.

The BI-RADS scale in plain words

BI-RADS 0: incomplete, more imaging is needed. 1: normal. 2: benign finding. 3: probably benign, control in 6 months (less than 2 % chance of cancer). 4: suspicious, biopsy recommended. 5: highly suggestive of cancer, biopsy. 6: cancer already confirmed. A BI-RADS 4 does not mean you have cancer; it means a biopsy is needed to know.

How the review works

I review your images —not only the report— together with your history, examine you, and decide whether you need additional views, ultrasound, a 6-month control or a biopsy. If a biopsy is needed it can be done in Monterrey within days.

Screening recommendations

Monthly self-exam from 18, annual clinical breast exam from 25, screening mammogram from 40 —earlier with a mother, sister or daughter with breast cancer— and ultrasound as a complement for dense breasts and younger women.

On video

Detecting breast cancer early changes everything

Hospital Ángeles Valle Oriente with Dr. Herrera, Oct-2025 (Spanish)

Transcript (Spanish)

El cáncer de mama es la principal causa de muerte por cáncer en mujeres en México, pero también detectado a tiempo es curable. La detección oportuna tiene tres pasos clave. Primero, comienza con la autoexploración a partir de los 18 años. Una vez que cumplas 25, tienes que acudir a un examen clínico por tu médico de cabecera. Y a partir de los 40, te invito a que te hagas tu mamografía para detectar lesiones aún cuando no son palpables todavía. La mastografía es un estudio rápido, seguro, que puede darnos suficiente información para hacer un diagnóstico temprano. Este estudio puede hacer la diferencia entre un tratamiento sencillo y uno más complejo. Conócete, revísate y hazte la mamografía. Estos sencillos pasos pueden salvar tu vida. Acuérdense que la detección oportuna no es solo hacer un checklist. Involucra también el que tú te conozcas, el que pidas ayuda cuando detectes que algo no es normal, porque recuerda que tú sola puedes hacer la diferencia en tu vida.

Frequently asked questions

Almost certainly not: the chance is below 2 %. The correct step is a repeat study in 6 months to confirm it does not change.

An image-guided needle biopsy. Most BI-RADS 4 findings turn out benign, but only the biopsy confirms it.

Yes. Send the images (DICOM or the CD from your imaging center) and the report by WhatsApp or email link; you receive an opinion and a plan before deciding to travel.
Note: this information is educational and does not replace a medical evaluation. Every case is assessed in consultation.

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★★★★★ 500+ verified patient reviews · 5.0 of 5 on Doctoralia

Consultation $1,400 MXN (about US$75) — includes exam, in-office breast ultrasound and review of your imaging.

Hospital Ángeles Valle Oriente
Suite 1104
San Pedro Garza García, N.L., Mexico

WhatsApp +52 81 3400 0000+52 81 8368 7793

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Location and contact

Private practice at Hospital Ángeles Valle Oriente, Monterrey metropolitan area, Mexico

Address

Hospital Ángeles Valle Oriente
Av. Frida Kahlo 180, Torre de Especialidades Médicas
Suite 1104
San Pedro Garza García, N.L., Mexico

Directions
Getting here

Monterrey (MTY) is about a 2-hour flight from Houston, Dallas and San Antonio, with direct flights from several U.S. hubs. The hospital is 30 minutes from the airport.