BACKDROUND:

Neuroendocrine carcinomas are infrequent breast neoplasms representing less than 2% of breast neoplasms. The diagnosis is difficult, since their clinical and morphological characteristics do not help to differentiate them from other types of breast neoplasms. The immunohistochemistry that will determine the characterization of the tumor by the presence of neuroendocrine markers. It is important to rule out a cases of metastasis related to a different primary origin, in order to prescribe the appropriate treatment for the patient.

CLINICAL CASE:

A 37-year-old patient from another institution with a diagnosis suggestive of high-grade carcinoma of medium cells, with neuroendocrine differentiation, involvement of the 3 levels of Berg and pathological supraclavicular adenopathies. After performing the imaging studies and determining the specific tumor markers of the disease, the diagnosis of breast neuroendocrine carcinoma. Neoadjuvant treatment with cisplastin and etoposide is indicated, with the same partial reaction of 50%. Subsequently, the radical mastectomy was performed, with the emptying of the 3 levels of Berg and the removal of the supraclavicular nodes without apparent complications. Currently remains stable in the treatment with adjuvant chemotherapy.

CONCLUSIONS:

It is important to determine the tumor markers associated with breast neuroendocrine carcinomas, with the aim of establishing accurate diagnosis and implementing the appropriate treatment, which may vary depending on its origin. To date there is no consensus of treatment, so each case must be individualized. Additional studies are required to expand the knowledge of this tumor variant.

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