About United Breast & Endocrine Surgery

United Breast & Endocrine Surgery is proud to provide unparalleled specialty surgical care to all patients 14 years of age and older in need of breast, thyroid and parathyroid surgery. With a conveniently located office in Murrieta, our team takes great pride in offering high quality specialty care to the communities of Southern California.

We are excited to announce our practice is now open for Breast Surgery consults and Endocrine Surgery consults in Murrieta. Schedule your appointment today!

Our Mission

As the only surgeon in the Murrieta and Temecula area specializing in the management of breast, thyroid, and parathyroid conditions, Dr. Tiffany Sinclair is passionate about providing innovative, cutting-edge care to her patients.

With advanced certification in Complex Thyroid and Parathyroid Surgery, she has significant clinical experience in the treatment of thyroid cancer and parathyroid disease, including re-operative neck surgery.

Dr. Sinclair and her team at the United Breast Center also specialize in comprehensive breast health care, ranging from high-risk breast cancer screening to complex, multi-disciplinary breast cancer management. Our high-risk clinic offers breast cancer risk evaluations and genetic testing to qualifying patients with a family history of cancer.

No matter the diagnosis, our team with guide you through each step of your care. Our practice strives to demonstrate compassion while maintaining high reliability as we aim to fulfill a superior patient-centered experience. We thank you for the opportunity to be a part of your healthcare team.

What Sets Our Practice Apart

With advanced certification in Complex Thyroid and Parathyroid Surgery, Dr. Tiffany Sinclair has significant clinical experience in the treatment of thyroid cancer and parathyroid disease, including re-operative neck surgery. She performs her own neck ultrasounds during every consultation, ensuring a complete assessment and the ability to provide real-time recommendations. Thyroid nodule and lymph node biopsies are performed in-office allowing for expedited appointment scheduling and follow up care. Specimens are analyzed by our own United Medical Doctor’s pathologist and advanced molecular analysis is offered for indeterminate nodules.

For patients diagnosed with breast cancer, Dr. Sinclair is committed to delivering evidenced-based, guideline-driven cancer care and partners with local medical and radiation oncologists to coordinate treatment planning and follow up. She offers the latest surgical techniques, including wire-free breast conservation surgery and targeted axillary dissections, and works with local plastic surgeons to perform combined surgery for patients interested in oncoplastic procedures or breast reconstruction.

Conditions Treated

Our team is proud to treat the following conditions of the breast, thyroid and parathyroid:

  • Benign Breast Masses
  • Breast Cysts
  • Breast Abscesses/Infections
  • Granulomatous Mastitis
  • Nipple Discharge
  • Nipple Lesions
  • BRCA1/2 and Other Genetic Mutations Associated with Increased Breast Cancer Risk
  • Breast Papillomas
  • Atypical and Precancerous Breast Lesions
  • Breast Cancer
  • Male Breast Cancer
  • Benign Thyroid Nodules
  • Thyroid Goiters
  • Hyperthyroidism
  • Graves’ Disease
  • Thyroid Cancer
  • Multiple Endocrine Neoplasia
  • Cowden Syndrome
  • Hyperparathyroidism (Primary, Secondary and Tertiary)
  • Parathyroid Cancer

Breast & Endocrine Procedures & Surgeries Offered

Our team is proud to offer the following procedures and surgeries of the breast, thyroid and parathyroid:

  • Breast Ultrasound
  • Breast Mass Excision
  • Surgical Breast Biopsy
  • Aspiration/Drainage of Breast Abscesses
  • Partial Mastectomy/Breast Conservation Surgery
  • Mastectomy
  • Nipple-Sparing Mastectomy
  • Prophylactic Mastectomy
  • Axillary Lymph Node Biopsy
  • Axillary Lymph Node Dissection
  • Neck Ultrasound
  • Ultrasound-Guided Thyroid and Cervical Lymph Node Biopsy
  • Thyroid Cyst Aspiration
  • Thyroid Lobectomy
  • Complete Thyroidectomy
  • Cervical Lymph Node Dissection
  • Focused Parathyroidectomy
  • 4-Gland Parathyroid Exploration
  • Parathyroid Auto-Transplantation

Our Breast & Endocrine Surgery Team

Our Locations

Murrieta Makena

35100 Makena Ave., Ste. 102, Murrieta, CA 92563

Ph: (951) 942-2140 | Fax: (951) 709-0775

Request an Appointment

United Breast & Endocrine Surgery is now open for Breast Surgery, Breast Imaging and Endocrine Surgery!

To request an appointment, please fill out the form below or call our office directly:

Breast Imaging Appointments: (951) 942-2140
Breast & Endocrine Surgery Consults: (951) 942-2140

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*Please do not submit personal medical information through this form. This form is intended for general inquiries and appointment requests only. If this is a medical emergency, please call 911. Thank you!

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    Breast & Endocrine Surgery Patient Resources

    Dr. Sinclair believes in empowering her patients through knowledge and education. Please feel free to download the below patient resources!