Anal stenosis

Introduction Anal canal stenosis refers to a series of clinical symptoms such as difficulty in defecation, thin stools, or pain in the anus after abdomen due to various reasons. According to the time of onset, it can be divided into congenital anal canal stenosis and acquired anal canal stenosis.

Cause

Causes

1. Congenital anal canal stenosis: In the process of rectal development, the original anal canal has not disappeared or disappeared, which can cause congenital atresia or stenosis.

2, acquired anal canal stenosis: common after sputum or anal fistula resection, due to improper operation techniques, excessive mucosal resection, resulting in scar contracture and formation of stenosis. Inflammation, ulcers, trauma, burns, tumors, etc. in the anal canal can cause stenosis.

an examination

Related inspection

Conventional fecal faecal fecal blood

(1) Symptoms: The main symptoms are thin feces and difficulty in defecation. If there is infection or ulcer, there is pain.

1. Difficulty in defecation: Congenital anal stenosis and acquired anal stenosis are characterized by difficulty in stool, thinning of stool or only a small amount of dilute feces, and increased frequency of bowel movements.

2. Pain: Anal pain in the stool and after the stool, blood in the stool, may be accompanied by anal bulge, heavy and heavy, burning, foreign body sensation and so on.

3. Others: Some patients may be accompanied by anal incontinence, abdominal distension and other symptoms.

(B) signs: due to the stimulation of secretions, the appearance of perianal skin changes, epidermal detachment, superficial rupture, or see anal deformity.

Differential diagnosis

1. Anal fissure: In patients with anal canal stenosis, due to hyperplasia of the anal canal, the skin loses its elasticity, and when the stool passes through the skin, it forms a gap and is easily mixed with the anal fissure. Local examination showed that the crack of the anal fissure was deep, the elasticity of the surrounding skin was normal, and the gap caused by the anal canal stenosis was shallow, the skin around the skin was less elastic, and the anal canal was narrow, which was easier to identify.

2. Anal squamous cell carcinoma: The clinical manifestations of anal canal squamous cell carcinoma and anal canal stenosis are similar and can be identified by pathological examination.

3. Sexually-acquired lymphogranuloma: Sexually-acquired lymphogranuloma can also cause anal canal stenosis, which is similar to anal stenosis, but it has a history of smelting, groin, lymph node enlargement, positive Frye test, to identify.

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