Introduction: Breast pilonidal sinus is an extremely rare variant of the condition, the report aims to present a case of pilonidal sinus occurring in the breast.
Case presentation: A 35-year-old female presented with a left breast discharging lesion for a 5-month duration. There was a local redness with multiple discharging sinuses on her left breast at 3-5 oclock, 3-4 cm away from the nipple. The discharge was serosanguinous in appearance. The lesion was excised totally with primary closure under general anesthesia. Histopathological examination was consistent with pilonidal sinus.
Discussion: For atypical pilonidal sinus disease, surgery is the modality of choice but regarding sacrococcygeal pilonidal sinus, non-operative treatment begins to grow. The cardinal risk factors for recurrence and complications are male gender, family history, tobacco smoking, obesity, size of sinus, poor personal hygiene and surgical methods.

Link :

https://www.researchgate.net/profile/Rawezh-Salih/publication/337833659_Pilonidal_sinus_of_breast_A_case_report_with_literature_review/links/5df001fb92851c8364737e16/Pilonidal-sinus-of-breast-A-case-report-with-literature-review.pdf