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Topic: Squamous cell papilloma

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In the News (Mon 19 Aug 19)

  eMedicine - Sinonasal Papillomas, Treatment : Article by Nader Sadeghi, MD, FRCSC   (Site not responding. Last check: 2007-10-21)
Batsakis JG: Squamous cell "papillomas" of the oral cavity, sinonasal tract and larynx.
Hyams VJ: Papillomas of the nasal cavity and paranasal sinuses.
Snyder RN, Perzin KH: Papillomatosis of nasal cavity and paranasal sinuses (inverted papilloma, squamous papilloma).
www.emedicine.com /ent/topic529.htm   (4740 words)

 HPV infections in benign and malignant sinonasal lesions -- Syrjänen 56 (3): 174 -- Journal of Clinical Pathology
HPV infections in etiology of benign and malignant sinonasal, bronchial and oesophageal squamous cell lesions.
Papillomas of the nasal cavity and paranasal sinuses.
Epithelial cell proliferation, apoptosis, and apoptosis inhibition in inverted papillomas.
jcp.bmjjournals.com /cgi/content/full/56/3/174   (5459 words)

 HPV infections and oesophageal cancer -- Syrjänen 55 (10): 721 -- Journal of Clinical Pathology
analysed: of the 1485 squamous cell carcinomas analysed by in
Is papilloma of the esophagus a preneoplastic lesion?
Pathogenesis of esophageal squamous cell carcinoma with lymphoid stroma.
jcp.bmjjournals.com /cgi/content/full/55/10/721   (6269 words)

 Squamous Cell Carcinoma of the Skin
In contrast to the homogeneous immunoreactivity of proliferating cells composed of AK, BAK, and BOD, heterogeneous and diminished immunostaining to hMSH2 was observed in tumor cells of SCCs examined.
Peroxisome proliferator-activated receptors in squamous cell carcinoma and its precursors.
Thirty percent of invasive squamous cell carcinomas had full-thickness staining of the in situ component of the lesion, and 100% of invasive squamous cell carcinomas exhibited moderate to strong staining of the invasive component of the lesion.
www.thedoctorsdoctor.com /diseases/skin_squamouscell_CA.htm   (11448 words)

 Squamous Cell Skin Cancers
Squamous cell carcinoma is the second most common type of skin cancer.
Eighty percent are basal cell carcinoma, 16% are squamous cell carcinoma and 4% are melanoma.
Bowen’s disease: This is a superficial squamous cell carcinoma.
www.yourskindoctor.com /squamous.html   (883 words)

 Recognizing Skin Cancer--Squamous Cell Carcinoma   (Site not responding. Last check: 2007-10-21)
Some squamous cell carcinomas arise within areas of radiation dermatitis, within burn scars, or in patients with a history of arsenic ingestion: these tumors tend to be more aggressive.
Squamous cell carcinoma should be considered as the diagnosis if an isolated area of presumed psoriasis or eczematous dermatitis is unresponsive to therapy.
Squamous cell carcinoma may remain in situ (confined to the epidermis), or it may invade the underlying dermis.
www.bu.edu /cme/modules/2002/skincancer02/content/03-squam.htm   (482 words)

 eMedicine - Papilloma, Conjunctival : Article by Hon-Vu Q Duong, MD   (Site not responding. Last check: 2007-10-21)
Squamous cell carcinoma is seen commonly in the interpalpebral zone adjacent to the limbus and rarely appears elsewhere.
Squamous cell papillomas (eg, infectious papilloma, viral conjunctival papilloma) are composed of multiple branching fronds emanating from a narrow pedunculated base.
Unlike inverted papilloma arising in the lateral nasal wall or paranasal sinuses, lesions arising from the conjunctiva tend to be less aggressive in malignant transformation.
www.emedicine.com /oph/topic611.htm   (4056 words)

 Journal of Carcinogenesis | Full text | Therapy of murine squamous cell carcinomas with 2-difluoromethylornithine
Squamous cell carcinomas, if they develop at all, are a small fraction of total tumors and appear with a long latency (6–12 months).
A typical squamous cell carcinoma and spindle cell carcinoma are shown in Fig 3.
The one spindle cell carcinoma with moderately elevated ODC and polyamine levels was actually a mixed tumor composed of both squamous cell carcinoma and spindle cell carcinoma components, suggesting the former contributes most of the measured ODC activity and polyamines.
www.carcinogenesis.com /content/3/1/10   (4653 words)

 Health Information - Yale Medical Group
Squamous cell skin cancer (sometimes referred to as non-melanoma carcinoma) may appear as nodules, or as red, scaly patches of skin.
Squamous cell carcinoma is the second most common skin cancer found in Caucasians, and is usually found on fair-skinned persons.
Squamous cell carcinoma is typically is found on the rim of the ear, face, lips and mouth, however, it can spread to other parts of the body.
ymghealthinfo.org /content.asp?page=P01353   (212 words)

 Squamous Cell Cancer - New Treatments, January 22, 2005
Squamous cell carcinoma (squamous cell cancer) is the second most common skin malignancy after basal cell carcinoma.
Squamous cell carcinoma on the hands, feet, or genitalia may be induced by papilloma virus.
Squamous cell carcinomas are usually firmly indurated keratotic plaques; they may be ulcerated or have a crater-like center.
www.ccspublishing.com /journals4a/squamous_cell_cancer.htm   (419 words)

 Case 8--Discussion
After the diagnosis was made, we obtained a history of excision of a squamous papilloma of the vocal cord when the patient was a teenager.
Papillomas may be located on the true or false cords, the epiglottis, the tracheobronchial mucosa, or in the lung.
Some papillomas have ciliated or goblet cells mixed with the squamous cells [8,9], and tumors have been classified as squamous or mixed squamous and glandular [10].
pathhsw5m54.ucsf.edu /case8/discussion8.html   (1952 words)

 Biologictherapy.Org: Bladder Cancer: Squamous cell carcinoma   (Site not responding. Last check: 2007-10-21)
Squamous cell carcinomas (SCC) are rare but tend to be of high grade and have a poor prognosis.
The lesions consist of one cell type resembling keratinocytes in their protein profiles, and exhibiting distinct squamous characteristics, such as pearl formation and keratohyalin bodies.
The histiogenesis of SCCs is unclear, although these lesions may arise from extensive squamous metaplasia of TCCs (i.e., CIS or high grade papillary TCCs) or from neoplastic transformation — on the basis of squamous metaplasia — of the bladder urothelium (see diagram below).
www.biologictherapy.org /bladdercancer/bladder_path_squam.html   (167 words)

 Olympus Microscopy Resource Center: Specialized Microscopy Techniques - Phase Contrast Photomicrography Gallery - ...
Papillomas, also known as warts or corns, are benign (noncancerous) growths of the skin or mucous membranes and are caused by the Human Papilloma Virus (HPV).
Most papillomas will go away on their own or can be tolerated if they are not in a pre-cancerous state.
The genome of the virus is contained entirely on a double-stranded circular DNA molecule, which replicates entirely in the nucleus of the host cell.
www.olympusmicro.com /primer/techniques/phasegallery/squamouscellpapilloma.html   (257 words)

 Expression of Cyclo-oxygenase-2 in Naturally Occurring Squamous Cell Carcinomas in Dogs -- de Almeida et al. 49 (7): ...
Three different squamous cell carcinomas are shown (A is from Case 39; B is from Case 25; C is from Case 40, as listed in Table 1).
Solubilized cell extracts were prepared from normal skin, a squamous cell carcinoma (Case 39; Table 1), and canine platelets, and were analyzed by one-dimensional SDS-PAGE and immunoblotting as described in Materials and Methods.
Salashe SJ (2000) Epidemiology of actinic keratoses and squamous cell carcinoma.
www.jhc.org /cgi/content/full/49/7/867   (4568 words)

Human papilloma virus was first suggested as a factor in the pathogenesis of ESP by Syranen et al.12 In all our patients, the immunoperoxidase stain for HPV was negative.
Squamous cell papilloma of the esophagus: a case report and review of the literature.
Esophageal squamous papillomas: a clinicopathological study of 38 lesions and analysis for human papilloma virus by the polymerase chain reaction.
www.kfshrc.edu.sa /annals/152/94117ar.html   (1218 words)

 Squamous Cell Carcinoma   (Site not responding. Last check: 2007-10-21)
Squamous cell carcinoma is a keratinized lesion, often affecting the eyelid magin.
the risk of matastases is related to tumorsize, depth of tumor invasion and degree of celluar differentiation.if a biopsy confirms the diagnosis of squamous cell carcinoma,surgical excision is performed with microscopic monitoring of tissuse margin and eyelid reconstruction.
Squamous carcinoma-in-situ is an intraepithelial lesion that has not invaded basement membrane, the lesion is then defined as squamous cell carcinoma.
members.fortunecity.com /eyedis/12.html   (180 words)

Exposure to AZT was toxic to the bone marrow, resulting in significant changes in the peripheral blood (decreased hematocrit values, erythrocyte counts, and hemoglobin concentrations, and increased mean cell volume and mean cell hemoglobin) and bone marrow (erythroid hypoplasia) characteristic of a dose- and time-dependent, minimal to moderate, poorly regenerative macrocytic anemia.
Incidences of squamous cell carcinoma and squamous cell papilloma or carcinoma (combined) of the vagina occurred with a positive trend and were significantly increased in groups of female mice receiving 60 or 120 mg/kg AZT.
There was clear evidence of carcinogenic activity of AZT in female mice based on increased incidences of squamous cell neoplasms of the vagina in groups that received AZT.
www.gaiaresearch.co.za /azt.html   (698 words)

 [No title]
In mice, seven late-appearing (after 19 months) vaginal neoplasms (five non-metastasizing squamous cell carcinomas, one squamous cell papilloma, and one squamous polyp) occurred in animals given the highest dose.
One late-appearing squamous cell papilloma occurred in the vagina of a middle-dose animal.
Zidovudine was mutagenic in a L51 78Y/ TK+/- mouse lymphoma assay, positive in an in vitro cell transformation assay, clastogenic in a cytogenetic assay using cultured human lymphocytes, and positive in mouse and rat micronucleus tests after repeated doses.
www.best-meds.com /druginfo/retrovir_warnings.htm   (1366 words)

 TUMOR FACTS AND INFORMATION   (Site not responding. Last check: 2007-10-21)
An epithelial tumor is considered malignant if it penetrates the basal_lamina and is considered benign if it does not.
Tumors are caused by mutations in DNA of cells.
Cells have mechanisms that repair DNA and other mechanisms that cause the cell to destroy itself by apoptosis if DNA damage gets too severe.
www.whereintheworldisbush.com /tumor   (373 words)

 Human papillomavirus (HPV) in head and neck cancer
Our group was the first to present evidence on the involvement of HPV infections in both laryngeal and oral carcinogenesis, prompted by the discovery of morphological similarities between oral and cervical squamous cell lesions.
To date, 1041 sino-nasal papillomas have been analysed for HPV and 347 (33%) cases have been positive, whereas of the 322 sino-nasal carcinomas analysed so far, 70 (22%) have been positive for any HPV type.
Laryngeal squamous cell papilloma and recurrent respiratory papillomatosis (RRP) are well-established HPV-induced tumours, whereas the role of HPV in laryngeal carcinomatosis remains controversial.
www.oralcancerfoundation.org /news/story.asp?newsId=646   (357 words)

 Glossary S-Z
It is dead tissue (cells) that contributes to the physical outer barrier of the skin.
This tissue is usually composed of fat cells and the structures that run through it, i.e., blood vessels, nerves, etc.
The term indicates the unusual presence of a type of tissue (group of cells) in an area in which it is not commonly found in most individuals.
www.skincancerinfo.com /glossary/glossary-s-z.html   (1506 words)

 Arch Otolaryngol Head Neck Surg -- Abstract: Squamous cell papilloma at the tracheoesophageal puncture stoma, May 1988, ...
Arch Otolaryngol Head Neck Surg -- Abstract: Squamous cell papilloma at the tracheoesophageal puncture stoma, May 1988, Papay et al.
were noted where squamous cell papilloma was found at the tracheoesophageal
surgical excision of the papilloma with postoperative care are described.
archotol.ama-assn.org /cgi/content/abstract/114/5/564   (117 words)

 Tumours of the penis   (Site not responding. Last check: 2007-10-21)
Tumours of the penis mainly involve the surface epithelium and include fibropapillomas, and squamous papillomas and carcinomas.
Squamous cell papillomas and carcinomas occur most commonly in horses.
This tumour may occur in dogs and in bitches; it is derived from a population of cells of lymphoid origin, with an abnormal karyotype; it is transmitted directly by living cells rather than involving transformation of host cells.
www.bris.ac.uk /pathandmicro/tutorials/repro/repro9.htm   (137 words)

 ae   (Site not responding. Last check: 2007-10-21)
Since the lesion expands and remodels bone rather than destroys it, malignancies such as squamous cell carcinoma, esthesioneuroblastoma, and salivary gland tumors would be relatively unlikely.
Inverting papillomas are most common in middle aged males and present with unilateral nasal obstruction.
The tumors are histologically benign, but foci of squamous cell carcinoma within the lesion are not uncommon.
www.med.uc.edu /neurorad/webpage/gga.html   (157 words)

 Articles on Abnormal Pap Smear with Atypical Squamous Cell Changes - ASCUS
If you remember your biology, the nucleus is larger in proportion to the cytoplasm in the cell than it normally is. This increased nuclear activity can be due to infection or cellular repair processes, irritation associated with atrophic changes of the low estrogen menopausal state, or external agents causing cell damage such as radiation therapy.
In general, ASCUS (atypical squamous cells of undetermined significance) is not a precancerous change.
Any treatment that destroys the abnormal cells such as cryotherapy, laser, LEEP, electrical cautery or hyfercation (thermal heat cautery) will hopefully induce normal cells to heal over the destroyed area and result in a normal Pap smear after healing has taken place.
www.wdxcyber.com /npapvg13.htm   (1408 words)

 tumor defenition   (Site not responding. Last check: 2007-10-21)
squamous epithelium: squamous cell papilloma, squamous cell carcinoma
Teratoma (mature teratoma, immature teratoma) An epithelial tumor is considered malignant if it penetrates the basal lamina and is considered benign if it does not.
Tumors are caused by mutations in DNA of Cell biology cells.
www.dictionarywords.com /tumor-defenition.html   (515 words)

 Reports Published From the Papillomavirus Project Since 810000
Immunoperoxidase demonstration of Human papilloma virus (HPV) in dysplastic lesions of the utedne cervbc Arch.
Human papillomavirus (HPV) invelvement in the squamous cell lesions of the oral cavity.
Human papillomavirus DNA in bronchial squamous cell carcinomas.
tobaccodocuments.org /pm/2501189737-9759.html   (3711 words)

 [No title]   (Site not responding. Last check: 2007-10-21)
In rare cases, papillomas may mutate and lead to cancer.
Squamous papilloma is a generic term for any papilloma of non...
Squamous Cell Carcinoma in Situ Patients in whom squamous cell carcinoma in situ of the genitalia is...
www.dieseseitehatzurzeitkeinenbock.de /5330   (266 words)

 A case report of inverted papilloma associated with squamous cell carcinoma in paranasal sinus   (Site not responding. Last check: 2007-10-21)
Mutation of p53 gene is known to be one of the most common specific gene change in human cancers, although the role of the gene alternation on malignant transformation is still controversial.
In this study, we report the immunolocalization of p53 protein, as well as PCNA and MIB-1, in inverted papilloma (IP) associated with squamous cell carcinoma.
p53 positive nuclei were absent in the normal mucosa, basally localized in benign portion of IP and diffusely observed in the squamous cell carcinoma (SCC).
ejpath.amu.edu.pl /ejp6-4/004-05.htm   (173 words)

 IngentaConnect Esophageal papillomatosis complicated by squamous cell carcinoma ...   (Site not responding. Last check: 2007-10-21)
An esophageal lesion resected from a 74-year-old woman demonstrated histological findings characteristic of squamous cell papilloma (fibrovascular core and numerous finger-like projections covered with hyperplastic squamous epithelium) and severe dysplasia characteristic of squamous cell carcinoma.
The relation of squamous papilloma and squamous cell carcinoma is discussed.
It is suggested that esophageal squamous cell papilloma is a premalignant lesion.
www.ingentaconnect.com /content/bsc/des/2004/00000017/00000004/art00015   (158 words)

 Disease Search   (Site not responding. Last check: 2007-10-21)
A common situation in which epithelial cells within chronic apical periodontitis are stimulated to proliferate with formation of a central cavity; removal of cause and surgical removal will cure this lesion.
A fairly-common condition in which raised reddish areas are observed at the lateral tongue base; they may resemble squamous cell carcinoma, however their location and bilateral occurrence usually establish the diagnosis without biopsy.
Uncommon appearance of unexplained jaw radiolucency that proves, on biopsy, to be composed of malignant cells which are not of oral origin; primary malignancies are often in breast, prostate, kidney, or thyroid; prognosis is grave.
www.usc.edu /hsc/dental/opath/LookUp/Diseases.html   (2915 words)

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