WordNet

used of preliterate or tribal or nonindustrial societies; "primitive societies"
a person who belongs to an early stage of civilization (同)primitive person
a mathematical expression from which another expression is derived
a word serving as the basis for inflected or derived forms; "`pick is the primitive from which `picket is derived"
of or created by one without formal training; simple or naive in style; "primitive art such as that by Grandma Moses is often colorful and striking" (同)naive
an abnormal new mass of tissue that serves no purpose (同)tumour, neoplasm

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Pure Erythroid Leukemia Mimicking Ewing Sarcoma/Primitive Neuroectodermal Tumor in an Infant.

Lapadat R1, Tower RL 2nd2, Tam W3, Orazi A3, Gheorghe G4.
Pediatric blood & cancer.Pediatr Blood Cancer.2016 May;63(5):935-7. doi: 10.1002/pbc.25898. Epub 2016 Jan 15.
Pure erythroid leukemia (PEL) is a rare type of acute myeloid leukemia (AML) with a very aggressive clinical course. Presentation as a myeloid/erythroid sarcoma is exceedingly rare. We describe an infantile PEL presenting as a multifocal myeloid sarcoma, clinically and pathologically mimicking Ewing
PMID 26773805

CT and clinical findings of peripheral primitive neuroectodermal tumour in children.

Xiao H1, Bao F2, Tan H1, Wang B1, Liu W2, Gao J1, Gao X3.
The British journal of radiology.Br J Radiol.2016 Apr;89(1060):20140450. doi: 10.1259/bjr.20140450. Epub 2016 Feb 5.
OBJECTIVE: To describe the clinical, CT and pathological findings of paediatric peripheral primitive neuroectodermal tumours (pPNETs) to enhance the recognition of these rare tumours.METHODS: The clinical, CT and pathological findings of 18 paediatric patients with pPNETs confirmed by biopsy or surg
PMID 26847997

Maternal residential proximity to major roadways at delivery and childhood central nervous system tumors.

Danysh HE1, Zhang K2, Mitchell LE3, Scheurer ME4, Lupo PJ5.
Environmental research.Environ Res.2016 Apr;146:315-22. doi: 10.1016/j.envres.2016.01.012. Epub 2016 Jan 20.
BACKGROUND: Due to concerns over the impact of traffic-related air pollution on childhood cancers, we evaluated the association between residential proximity to major roadways and childhood central nervous system (CNS) tumors.METHODS: The Texas Cancer Registry provided information on children diagno
PMID 26802618

Small Supratentorial, Extraaxial Primitive Neuroectodermal Tumor Causing Large Intracerebral Hematoma : Case Report

BURKHARDT Jan-Karl,KOCKRO Ralf A.,DOHMEN-SCHEUFLER Hildegard,WOERNLE Christoph M.,BELLUT David,KOLLIAS Spyros,BERTALANFFY Helmut
Neurologia medico-chirurgica = 神経外科 51(6), 441-444, 2011-06-15
… A 16-year-old boy presented with an unusual case of a supratentorial, extraaxial small round blue cell tumor of the central nervous system, which was most likely a primitive neuroectodermal tumor (PNET). … This tumor is one of the most aggressive intracerebral tumors, not only in children, so treatment strategies must be early, profound, and interdisciplinary. …
NAID 10029138228