title: Solitary pulmonary nodule with growth and contrast enhancement at CT: inflammatory pseudotumour as an unusual benign cause.
abstract: Small (< or =10 mm) pulmonary nodules are frequently detected at modern chest CT. As most of these nodules are benign, non-invasive classification is required--usually based on assessment of growth and perfusion. Absence of growth and no evidence of perfusion, as demonstrated by lack of enhancement at contrast-enhanced CT or MRI, strongly suggest a benign nodule. On the other hand, growth with a doubling of the nodule's volume between 20 days and 400 days or enhancement suggest a malignant nature of the lesion. We present an example of a nodule with strong contrast enhancement and a doubling time of approximately 260 days, which histologically represented a benign inflammatory pseudotumour.
authors.affiliation: Department of Diagnostic and Interventional Radiology, Marien Hospital, Academic Teaching Hospital, Rochusstr. 2, D-40479 Düsseldorf, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Diederich
authors.forename: D
authors.initials: D
authors.lastname: Theegarten
authors.forename: G
authors.initials: G
authors.lastname: Stamatis
authors.forename: R
authors.initials: R
authors.lastname: Lüthen
mesh_terms: D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006104:Granuloma, Plasma Cell / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D008875:Middle Aged; D003074:Solitary Pulmonary Nodule / Q000000981:diagnostic imaging* / Q000473:pathology; D036542:Tomography, Spiral Computed / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods*