An Interesting Pathological Diagnosis: Adenoid Cystic Carcinoma in an Adolescent Girl

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This case study examines a rare occurrence of adenoid cystic carcinoma in a 19-year-old woman.
This case study examines a rare occurrence of adenoid cystic carcinoma in a 19-year-old woman.

Abstract

Adenoid cystic carcinomas (ACCs) constitute 0.1–1 % of all malignant breast tumors. They have better prognosis than other breast malignancies. To date, there have been about 933 cases reported as per English literature. To the best of our knowledge, this case may be the second well-documented case of ACC of breast at younger age.

Keywords: ACC, young age, core biopsy

Adenoid cystic carcinomas (ACCs) constitute 0.1–1% of all malignant breast tumors. They have better prognosis than other breast malignancies. To date, there have been about 933 cases reported as per English literature.1,2 To the best of our knowledge, this case may be the second well-documented case of ACC of breast at a younger age.

A 19-year-old girl was admitted in YCR Hospital, Latur, with a complaint of lump in right breast, which was gradually increasing in size since past one year. The lump was 2 × 2 cm in size, mobile, and not fixed to deeper tissues and skin.

There was no evidence of palpable axillary lymphadenopathy. Mammography was suggestive of benign breast lesion—fibroadenoma. The Fine Needle Aspiration Cytology (FNAC) was planned and performed. Cytology revealed atypical epithelial cells with absence of bare nuclei and reported it as atypical epithelial hyperplasia (Fig. 1). In view of young age, core biopsy was planned and performed and the sample was sent to histopathology department to confirm the diagnosis.

The core biopsy revealed prominent solid, microcystic, and focally tubuloglandular patterns of growth with intact myoepithelial layer (Fig. 2). On immunohistochemical evaluation, the tumor cells were immunopositive for CK7 expression (Fig. 3) and myoepithelial cells were positive for p63 (Fig. 4).

Thus, the case was finally diagnosed as adenoid cystic carcinoma of breast and treated by breast conservative surgery with adjuvant radiotherapy, and on follow-up, it was found that the patient was doing well until date, since the last 18 months.




The histological characteristics of ACC in the breast are similar to those of ACC of the salivary glands. However, the prognosis of ACC of the breast is better than that of other locations with prolonged survival. Breast-conserving treatment including postoperative radiotherapy seems to be equivalent to mastectomy alone with respect to survival.

The value of adjuvant systemic therapies is not established. Late relapses can occur, so long-term follow-up is mandatory for these patients.3 Little has been published to date on its radiological features.2

The diagnosis is made by careful histological examination, presenting a difficult differential diagnosis with cribriform carcinoma. Therefore, it is necessary to use immunohistochemical techniques.4

To conclude, it is an interesting incidental core biopsy diagnosis in sharp contrast with the clinical diagnosis. Thus, in every palpable breast lump irrespective of age, core biopsy can be used as an effective diagnostic tool to hit the correct diagnosis.

Author Contributions

Conceived and designed the experiments: SBI. Analyzed the data: SBI. Wrote the first draft of the manuscript: NPJ. Jointly developed the structure and arguments for the paper: BDA. Made critical revisions and approved final version: CRH (I) and SS. All authors reviewed and approved of the final manuscript.

ACADEMIC EDITOR: Goberdhan P. Dimri, Editor in Chief

FUNDING: Authors disclose no funding sources.

COMPETING INTERESTS: Authors disclose no potential conflicts of interest.

Paper subject to independent expert blind peer review by minimum of two reviewers. All editorial decisions made by independent academic editor. Upon submission manuscript was subject to anti-plagiarism scanning.

Prior to publication all authors have given signed confirmation of agreement to article publication and compliance with all applicable ethical and legal requirements, including the accuracy of author and contributor information, disclosure of competing interests and funding sources, compliance with ethical requirements relating to human and animal study participants, and compliance with any copyright requirements of third parties. This journal is a member of the Committee on Publication Ethics (COPE).

REFERENCES

  1. Alis H, Yigitbas H, Kapan S, Kalayci M, Kilic G, Aygun E. Multifocal adenoid cystic carcinoma of the breast: an unusual presentation. Can J Surg. 2008;51(2):E36–E37. [PMC free article] [PubMed]
  2. Law YM, Quek ST, Tan PH, Wong SL. Adenoid cystic carcinoma of the breast. Singapore Med J. 2009;50(1):8–11. [PubMed]
  3. Boujelbene N, Khabir A, Boujelbene N, Jeanneret Sozzi W, Mirimanoff RO, Khanfir K. Clinical review—breast adenoid cystic carcinoma. Breast. 2012;21(2):124–127. [PubMed]
  4. Kallel R, Bahri Zouari I, Gouiaa N, et al. Adenoid cystic carcinoma of the breast. Cancer Radiother. 2009;13(4):323–328. [PubMed]

Source: Breast Cancer: Basic and Clinical Research.

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