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Pilonidal sinus involving the breast in a man: A case report and literature review
Rong Shi1,2, Peng Liu3, Xuan-Fen Zhang4
1Department of Mammary Glands, Gansu Provincial Hospital.
Rationale:
Pilonidal sinus disease (PSD) involving the breast is extremely rare and has not been described in man.
Patient Concerns:
This current case report presents a case of a pilonidal cyst in a 46-year-old man which was surgically treated. He had intermittent pain in his left breast for 2 months and came for local rupture and discharge for 1 week.
Diagnosis:
The initial diagnosis is male mastitis, on the basis of the histological features of H&E-stained specimens and immunohistochemistry of the resected lump, this case was diagnosed as PSD.
Interventions:
The patient underwent "enlarged resection of the left breast lesion" under local anesthesia.
Outcomes:
The patient's surgical area healed well, without any signs of recurrence.
Conclusion:
PSD involving the breast is extremely rare in man, with no typically clinical manifestations, and could be easily ignored. This disease requires great attentions from clinicians.

