Function Following Laser for Anal Intraepithelial Neoplasia (FLAN)

2019-10-04 08:31:37 | BioPortfolio


High-grade squamous intraepithelial lesions (HSIL) and anal cancer are rising in incidence and at highest risk are HIV positive men who have sex with men (MSM). This pilot study assessing anal function and patient-reported outcomes before and after laser ablation of HSIL will add to the evidence that such a therapy is an acceptable and safe treatment to offer in a preventative setting.


High resolution anoscopy with targeted laser ablation is one of the therapies currently employed to treat HSIL of the anus to prevent progression to anal cancer. The functional outcome of this procedure has not previously been formally assessed.

HIV positive MSM in whom HSIL has been detected will form the study population, as HSIL is prevalent in these patients and intervention is felt to be indicated. Functional assessments will be carried out prior to initial treatment and then repeated six months after laser ablation therapy. The structure, function and sensitivity of the anal canal will be evaluated using endoanal ultrasound, high-resolution anal manometry and anal mucosal electrosensitivity measurements respectively. Patient-reported outcomes will be assessed using questionnaires and semi-structured interviews at baseline, 4 weeks and 6 months post-treatment.

Study Design


Anus Cancer


high resolution anal manometry


Homerton University Hospital NHS Foundation Trust
United Kingdom
E9 6SR




Homerton University Hospital NHS Foundation Trust

Results (where available)

View Results


Published on BioPortfolio: 2019-10-04T08:31:37-0400

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Medical and Biotech [MESH] Definitions

Tumors or cancer of the ANAL CANAL.

A congenital abnormality characterized by the persistence of the anal membrane, resulting in a thin membrane covering the normal ANAL CANAL. Imperforation is not always complete and is treated by surgery in infancy. This defect is often associated with NEURAL TUBE DEFECTS; MENTAL RETARDATION; and DOWN SYNDROME.

Protrusion of the rectal mucous membrane through the anus. There are various degrees: incomplete with no displacement of the anal sphincter muscle; complete with displacement of the anal sphincter muscle; complete with no displacement of the anal sphincter muscle but with herniation of the bowel; and internal complete with rectosigmoid or upper rectum intussusception into the lower rectum.

A pair of anal glands or sacs, located on either side of the ANUS, that produce and store a dark, foul-smelling fluid in carnivorous animals such as MEPHITIDAE and DOGS. The expelled fluid is used as a defensive repellent (in skunks) or a material to mark territory (in dogs).

Tumors or cancer of the anal gland.

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