WordNet

reverse the position, order, relation, or condition of; "when forming a question, invert the subject and the verb" (同)reverse
make an inversion (in a musical composition); "here the theme is inverted"
being in such a position that top and bottom are reversed; "a quotation mark is sometimes called an inverted comma"; "an upside-down cake" (同)upside-down
a benign epithelial tumor forming a rounded mass (同)villoma, papillary_tumor, papillary tumour

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/03/23 23:35:50」(JST)

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An inverted papilloma is a type of tumor in which surface epithelial cells grow downward into the underlying supportive tissue. It may occur in the nose and/or sinuses or in the urinary tract (bladder, renal pelvis, ureter, urethra). When it occurs in the nose or sinuses, it may cause symptoms similar to those caused by sinusitis, such as nasal congestion. When it occurs in the urinary tract, it may cause blood in the urine.

Diagnosis By MRI[edit]

Inverted papillomas are definitively diagnosed by histologic examination. However, Magnetic Resonanace Imaging (MRI) may show a characteristic feature described as a Convoluted Cerebriform Pattern (CCP). A retrospective study published in the American Journal of Neuroradiology concluded that identification of CCP by MRI in a patient with a nasal tumor made the diagnosis of Inverted papilloma quite likely. The study reported the sensitivity and specificity to be 100% and 87% respectively. CCP can be associated with other malignant tumors as well.^[1]

References[edit]

^ Jeona, T.Y.; H.-J. Kima, S.-K. Chungb, H.-J. Dhongb, H.Y. Kimb, Y.J. Yima, S.T. Kima, P. Jeona and K.H. Kima (May 22, 2008). "Sinonasal Inverted Papilloma: Value of Convoluted Cerebriform Pattern on MR Imaging". American Journal of Neuroradiology 29 (8): 1556–1560. doi:10.3174/ajnr.A1128. PMID 18499786. Cite uses deprecated parameters (help)

External links[edit]

Inverted papilloma entry in the public domain NCI Dictionary of Cancer Terms

Additional images[edit]

Histopathology representing an inverted papilloma of the urinary bladder that was cystoscopically resected. Hematoxylin and eosion stain.
Histopathology representing an inverted papilloma of the urinary bladder that was cystoscopically resected. Hematoxylin and eosion stain.
Histopathology representing an inverted papilloma of the urinary bladder that was cystoscopically resected. Hematoxylin and eosion stain.

This article incorporates public domain material from the U.S. National Cancer Institute document "Dictionary of Cancer Terms".

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UpToDate Contents

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1. 鼻腔の腫瘍 tumors of the nasal cavity
2. 副鼻腔癌 paranasal sinus cancer
3. 膀胱腫瘍の病理 pathology of bladder neoplasms
4. 頭頸部腫瘍の病理 pathology of head and neck neoplasms
5. 慢性副鼻腔炎：臨床症状、病態生理、および診断 chronic rhinosinusitis clinical manifestations pathophysiology and diagnosis

English Journal

Inverted urothelial carcinoma: a series of 12 cases with a wide morphologic spectrum overlapping with the large nested variant.

Brimo F1, Dauphin-Pierre S2, Aprikian A3, Kassouf W3, Tanguay S3, Ajise O2, Dongo C4, Bégin LR5.
Human pathology.Hum Pathol.2015 Oct;46(10):1506-13. doi: 10.1016/j.humpath.2015.06.010. Epub 2015 Jun 26.
The current series presents 12 cases of invasive urothelial carcinoma (UC) with inverted growth pattern that fulfill the architectural criteria of the recently described "large nested" variant of UC, but which display a wider spectrum of morphologic and cytologic changes. All cases had an associated
PMID 26255235

Sialadenoma Papilliferum with Inverted Pattern in a Young Patient: A Case Report.

Reis de Sá Silva E Costa FE1, Vizcaíno Vázquez JR1.
The American journal of case reports.Am J Case Rep.2015 Sep 28;16:663-6. doi: 10.12659/AJCR.893987.
BACKGROUND Sialadenoma papilliferum (SP) is a rare, benign neoplasm of salivary gland origin which manifests as an exophytic papillary excrescence of the mucosa. Indeed, SP is both an exophytic proliferation of papillary stratified squamous epithelium above the mucosal surface and an endophytic sali
PMID 26414128

Surgical risk factors for recurrence of inverted papilloma.

Healy DY Jr1, Chhabra N2, Metson R3,4, Holbrook EH3,4, Gray ST3,4.
The Laryngoscope.Laryngoscope.2015 Sep 15. doi: 10.1002/lary.25663. [Epub ahead of print]
OBJECTIVES/HYPOTHESIS: To identify variations in surgical technique that impact the recurrence of inverted papilloma following endoscopic excision.STUDY DESIGN: Retrospective cohort.METHODS: Data from 127 consecutive patients who underwent endoscopic excision of inverted papilloma and oncocytic papi
PMID 26372045

Japanese Journal

膀胱Inverted papilloma 14例の検討

平澤輝一,梅本晋,藤浪潔
泌尿器科紀要 58(9), 471-474, 2012-09
… Inverted papilloma of the bladder is an uncommon urothelial neoplasm. … From 2005 to 2011, 14 cases of inverted papilloma of the bladder were diagnosed at our hospital. … This study does not suggest the malignant potential of inverted papilloma. … However, since inverted papilloma may correlate with urothelial carcinoma. …
NAID 40019429463