Oncology Medical News about cervical adenosquamous carcinoma;HPV 16 and 18

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Prevalence, viral load, and physical status of HPV 16 and 18 in cervical adenosquamous carcinoma
Virchows Archiv, 09/09/09

Yoshida T et al. – The prevalence of HPV 18 in adenosquamous carcinoma was high and many HPV 18-positive cases were the pure integrated form resulting in very low copy numbers/cell. It is possible that more aggressive transformation with early integration of HPV 18 results in cases with greater chromosomal instabilities, higher growth rates, and rapid progression.

Methods

Formalin-fixed paraffin-embedded tissue samples from 20 cases of histologically diagnosed adenosquamous carcinoma were examined
The squamous and glandular components were separately microdissected and analyzed for their HPV DNA subtype, viral load, and physical status using real-time PCR

Results

The percentages of HPV 16- and 18-positive cases among all the HPV-positive cases were 36.8% (7/19) and 57.9% (11/19) in the squamous epithelial elements and 33.3% (6/18) and 61.1% (11/18) in the glandular elements, respectively
PCR analysis with E2 primers revealed that seven of eleven (63.6%) HPV 18-positive cases had the pure integrated form in both elements
The mean HPV 16 DNA copy numbers/cell was 7.22 in the squamous elements and 1.33 in the glandular elements (p?=?0.04) while the corresponding mean HPV 18 DNA copy numbers/cell was 1.50 and 0.89, respectively

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