Anismus (synonyms: spastic pelvic floor syndrome, sphincter dyssynergia, pelvic floor dyssynergia, dyssynergic defecation, paradoxal puborectal contraction) is a malfunction of the external anal sphincter and puborectalis muscle during defecation. It occurs in children and adults, sometimes from birth.
Hello Dr Suliman
I was hoping to see what other RG members responded to this. As no-one has, I wondered if you had seen this paper (I thought that you would have done so). See p.1515 - Dyssynergic Defecation - which gives 3 types; however, this does not specifically relate to children:
Bharucha, A. E., Wald, A., Enck, P., & Rao, S. (2006). Functional anorectal disorders. Gastroenterology, 130(5), 1510-1518.
https://www.researchgate.net/publication/7101667_Functional_Anorectal_Disorders
If you still need an answer, I wonder if it would be worth contacting the authors.
Very best wishes,
Mary
Article Functional Anorectal Disorders
Child anusmus which means spastic contractions of the external anal sphincter can be due to organic, functional or psychological causes. Organic causes are causes of painful defecation. These include abrasions in the skin around the anus, and irritations of the anal skin like in Oxyuriraius (Pin-worm infestation). Also, infection of the anal skin e.g. fungal infection.
Anal fissure and anal fistula are important painful lesions which may lead to anusmus.
Lacerations in the anal sphincters (internal anal sphincter IAS, and external anal sphincter EAS) can lead painful conditions and subsequently anusmus.
Functional conditions like changes in the bowel habits e.g. constipation &/or diarrhea.
Psychological conditions as in conditions of fecal incontinence, leads, fear of embarrassment will lead to anusmus.
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