# From Prophylactic Screening to Definitive Treatment: A Case Report of Breast Cancer in a Young Woman

## TL;DR

A 39-year-old woman with a family history of breast cancer was diagnosed early through screening and underwent successful treatment, including surgery and chemotherapy.

## Contribution

This case highlights the importance of prophylactic screening and multidisciplinary treatment in young breast cancer patients.

## Key findings

- Early detection via routine ultrasonography led to timely diagnosis of invasive ductal carcinoma.
- The patient completed treatment without pathogenic gene mutations identified through genetic testing.
- Complications during chemotherapy required removal of a vascular port before treatment completion.

## Abstract

This article presents the case of a 39-year-old woman with a positive family history of breast cancer (her family member had left breast cancer, cT4N2M0, non-luminal human epidermal growth factor receptor 2 (HER2)-positive). During routine prophylactic ultrasonographic examination, a breast mass was detected, which, on further diagnostics, turned out to be an invasive ductal carcinoma of the left breast. The stage of the disease was determined as pT1cN1mic(sn), Nottingham Histologic Grade 3 (NHG 3).

The patient was subjected to surgical treatment, which involved left mastectomy with simultaneous removal of the axillary sentinel lymph node. Subsequently, adjuvant chemotherapy was administered, including a "dose-dense" regimen with the use of doxorubicin and cyclophosphamide, followed by treatment with paclitaxel. During chemotherapy, complications related to the implantation of a vascular port occurred, which resulted in its removal before the completion of treatment.

After the completion of chemotherapy, breast reconstruction was performed. During the entire treatment process, extended genetic diagnostics were performed, which did not demonstrate the presence of pathogenic gene mutations. The treatment was completed, and the patient remains under continuous care of the oncology outpatient clinic.