Bladder cancer is a common urological malignancy, mostly seen in men in the 6th and 7th decades. It is less common in women and very rare during pregnancy. Inverted papilloma is a tumor where surface epithelial cells grow into the underlying supportive tissue. It may be detected in the urinary tract and in particular in renal pelvis, ureter, bladder and urethra, and may mimic malignancy. Diagno...

Inverted papilloma is a typically benign, but locally aggressive tumor arising from the nasal cavity and paranasal sinuses. Malignant transformation can occur in up to 10% of cases. Although spontaneous tumor bleeding can occur with malignancies, hemorrhage secondary to tumor shrinkage has not been reported. We present a patient with metastatic squamous cell carcinoma (from inverted papilloma) ...

A 31-year-old Black man presented with two oval masses in his right conjunctiva. The tumors were completely excised and histology showed that the inferior lesion was a conjunctival squamous papilloma with pigmentation while the superior one was an inverted conjunctival papilloma, which grew in an endophytic manner. Follow up examination one year later showed no recurrence. Literature search rev...

Inverted papilloma (IP) or Shneiderian papilloma is a benign neoplasm of the sinonasal cavity that is hallmarked by its locally invasiveness, tendency for recurrence and malignant transformation. They arise from the ectodermally derived Scheiderian mucosa that lines the nasal cavity and paranasal sinuses. Predominantly observed in males in their fifth and sixth decade of life, it has an annual ...

Inverted Papilloma (IP) is an uncommon benign sinonasal neoplasm of a particular interest because of its capacity to recur and undergo malignant transformation. It affects usually the lateral nasal wall, but rarely develops in the nasopharynx. We report a case of a well-defined polypoidal lesion of the nasopharynx presented with decreased hearing secondary to unilateral middle ear effusion. It ...

Cellular retinole acid-binding protein (cRABP) was detected in the cytosol of virus-induced papilloma (Shope) of rabbit skin. The Shope papilloma cRABP showed the same ligand specific ity and sedimentation value (2S) as was found in other animal species. The level of cRABP in the papillomatous tissue was significantly higher than that in the normal rabbit skin and increased in accordance with t...

Respiratory epithelial adenomatoid hamartoma (REAH) is an uncommon lesion of the upper aerodigestive tract. It usually presents as a nasal or as a sinus or nasopharyngeal mass. The potential danger associated with REAH is the risk of misdiagnosis. Recognition and awareness of this benign lesion is necessary to distinguish it from inverted papilloma and adenocarcinoma. This is important to avoid...

Aims-To study the possible accumulation of p53 protein in inverted papilloma of the urinary bladder.Methods-Formalin fixed, paraffin wax embedded sections from 14 cases of inverted papilloma of the urinary bladder were studied retrospectively. Accumulation of p53 was detected by immunohistochemistry using a mouse monoclonal antibody directed against p53. p53 protein reactivity was scored as fol...

Sinonasal tumors may grow to considerable size before presentation and in view of their relation to the base of skull, orbit, cranial nerves and vital vessels; a precise diagnostic and therapeutic planning is needed to achieve the optimal results. We report a case who presented with unilateral nasal blockage, rhinorrhea and episodes of epistaxis which diagnosed as sinonasal inverted papilloma a...

Inverted papilloma (IP) is a rare, benign tumor of the nose and paranasal sinus. However, it is locally aggressive, the recurrence rate is high and malignant transformation is possible. Until now, IP of the hard palate has rarely been reported in the literature. Here, we reported a case with IP of the hard palate, which clinically presented as a carcinomatous growth. The management of IP is com...