Serrated polyposis syndrome

What it is

From: Orphanet

A rare, genetic intestinal disease characterized by the presence of multiple (usually large) hyperplastic/serrated colorectal polyps, usually with a pancolonic distribution. Histology reveals hyperplastic polyps, sessile serrated adenomas (most common), traditional serrated adenomas or mixed polyps. It is associated with an increased personal and familial (first-degree relatives) risk of colorectal cancer.

Reported clinical features and what the terms mean

The following findings are associated with this condition in Orphanet. They are not a checklist for diagnosing yourself, and they do not all occur in every affected person. Some are examination, imaging or laboratory findings that cannot be recognised at home.

The frequency labels describe how often a finding was reported among people with the condition in the source. They do not give the chance that a person with that symptom has the condition. Definitions below reproduce HPO terminology; they explain the term, not the likely severity in an individual.

Colorectal polyposis · Very frequent (99-80%)

Multiple abnormal growths that arise from the lining of the large intestine (colon or rectum) and protrude into the intestinal lumen.

Adenomatous colonic polyposis · Frequent (79-30%)

Presence of multiple adenomatous polyps in the colon.

Gastric diverticulum · Frequent (79-30%)

An outpouching of the gastric wall.

Neoplasm of the large intestine · Occasional (29-5%)

The presence of a neoplasm of the large intestine.

Biliary tract neoplasm · Very rare (<4-1%)

A tumor (abnormal growth of tissue) of the biliary system.

Bladder carcinoma · Very rare (<4-1%)

The presence of a carcinoma of the urinary bladder.

Breast carcinoma · Very rare (<4-1%)

The presence of a carcinoma of the breast.

Hodgkin lymphoma · Very rare (<4-1%)

A type of lymphoma characterized microscopically by multinucleated Reed-Sternberg cells.

Melanoma · Very rare (<4-1%)

The presence of a melanoma, a malignant cancer originating from pigment producing melanocytes. Melanoma can originate from the skin or the pigmented layers of the eye (the uvea).

Ovarian neoplasm · Very rare (<4-1%)

A tumor (abnormal growth of tissue) of the ovary.

Pancreatic adenocarcinoma · Very rare (<4-1%)

The presence of an adenocarcinoma of the pancreas.

Prostate cancer · Very rare (<4-1%)

A cancer of the prostate.

Schwannoma · Very rare (<4-1%)

A benign nerve sheath tumor composed of Schwann cells.

Germ cell neoplasia · Very rare (<4-1%)

When it may begin

From: Orphanet

Adult; Elderly

Inheritance in the source

From: Orphanet

Autosomal dominant; Multigenic/multifactorial; Unknown

Which doctor should you see?

The suggested department for discussing Serrated polyposis syndrome is Gastroenterology, with a gastroenterologist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

Additional services that may be relevant, depending on the findings, include: Clinical Genetics.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• Which digestive symptoms or nutritional changes matter most?
• What question would an endoscopy, scan or laboratory test answer if one is proposed?
• How should persistent pain, bleeding or difficulty eating be followed up?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Serrated polyposis syndrome. That gap does not mean that treatment is unavailable. A clinician needs to establish the diagnosis and review current guidance before recommending medicines, procedures, rehabilitation or other support.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.