WordNet

of first rank or importance or value; direct and immediate rather than secondary; "primary goals"; "a primary effect"; "primary sources"; "a primary interest"
a preliminary election where delegates or nominees are chosen (同)primary_election
one of the main flight feathers projecting along the outer edge of a birds wing (同)primary feather, primary quill
(astronomy) a celestial body (especially a star) relative to other objects in orbit around it
not derived from or reducible to something else; basic; "a primary instinct"
a usually malignant tumor arising from connective tissue (bone or muscle etc.); one of the four major types of cancer

PrepTutorEJDIC

『第一の』,『主要な』 / 『初期の』,『初等の』,初級の / 『根本的な』,基本的な,本来の,直接的な / 《名詞の前にのみ用いて》(回路・コイル・巻き・電流などが)一次の / 原色(三原色の一つ) / 《米》=primary election
肉腫(にくしゅ)

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Surgically treated patients with axial and peripheral Ewing's sarcoma family of tumours: A population based study in Finland during 1990-2009.

Serlo J1, Helenius I2, Vettenranta K3, Perkkiö M4, Riikonen P4, Sampo M5, Tarkkanen M5.
European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology.Eur J Surg Oncol.2015 Jul;41(7):893-8. doi: 10.1016/j.ejso.2015.02.010. Epub 2015 Mar 19.
BACKGROUND: The surgical treatment of Ewing's sarcoma family tumours (ESFTs) is challenging especially with axial tumours. The aim of the study was to analyse surgical treatment and outcome in a nationwide, population-based material consisting of surgically treated axial and peripheral ESFTs of bone
PMID 25817983

Pochon C1, Martelli H, Mussini C, Pariente D, Heymann MF, Corradini N.
Journal of pediatric hematology/oncology.J Pediatr Hematol Oncol.2015 Jul;37(5):411-3. doi: 10.1097/MPH.0000000000000289.
PMID 25411865