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Table 1 Timeline of relevant events

From: Pilonidal sinus of the cheek: an extremely rare clinical entity—case report and brief review of the literature

1st noticed (painful bulge) January 2017
Discharge noted February, 2017
Operated 1st (?Incision and drainage) May, 2017
Operation 2nd December, 2017
Self-Expression of pus from wound March, 2018
Operation 3rd April–May, 2018
Operation 4th (Our center) February, 2019
Regular follow up—wound healed June, 2019
Patient traced—telephone interview (recurrence—yes/no; response—no) March, 2019
Telephone follow-up (recurrence—Yes/No; response—No), satisfaction with final outcome and scar (satisfied, not satisfied—would/would not like to undergo a minor procedure to improve the scar; Response—Satisfied) August, 2020