|Other names||Ringertz tumour|
|Micrograph of an inverted papilloma of the urinary bladder. H&E stain.|
An inverted papilloma, also known as Ringertz tumour, 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.
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.
Medial maxillectomy is the treatment of choice.
Inverted Schneiderian Papilloma of the Nasal Cavity.
- Hasan, S. A.; Aziz, M.; Faruqi, N. A. (September 9, 1985). "Inverted papilloma of the nose (Ringertz tumour)". Journal of the Indian Medical Association. 83 (9): 316–318. PMID 4086856 – via PubMed.
- Jeon TY, Kim HJ, Chung SK, Dhong HJ, Kim HY, Yim YJ, Kim ST, Jeon P, Kim KH (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.
- Ringertz, Nils (January 9, 1938). Pathology of malignant tumors arising in the nasal and paranasal cavities and maxilla. Mercator. OCLC 257486867.
- Inverted papilloma entry in the public domain NCI Dictionary of Cancer Terms