SADEGHI-NEJAD, H Pilonidal sinus of the umbilicus. [electronic resource] - Lancet (London, England) Mar 1958 - 567 p. digital Publication Type: Journal Article ISSN: 0140-6736 Standard No.: 10.1016/s0140-6736(58)91196-6 doi Subjects--Topical Terms: HumansPilonidal SinusUmbilicus