Factor VII deficiency

What it is, symptoms and effects

From: MedlinePlus Genetics, National Library of Medicine

Factor VII deficiency is a rare bleeding disorder that varies in severity among affected individuals. The signs and symptoms of this condition can begin at any age, although the most severe cases are apparent in infancy. However, up to one-third of people with factor VII deficiency never have any bleeding problems. Factor VII deficiency commonly causes nosebleeds (epistaxis), bleeding of the gums, easy bruising, and prolonged or excessive bleeding following surgery or physical injury. Bleeding into joint spaces (hemarthrosis) and blood in the urine (hematuria) occasionally occur. Many women with factor VII deficiency have heavy or prolonged menstrual bleeding (menorrhagia). Severely affected individuals have an increased risk of bleeding inside the skull (intracranial hemorrhage) or in the gastrointestinal tract, which can be life-threatening. Although factor VII deficiency is primarily associated with increased bleeding, some people with the condition have excessive blood clotting (thrombosis).

Causes and biological mechanisms

From: MedlinePlus Genetics, National Library of Medicine

The inherited form of factor VII deficiency, known as congenital factor VII deficiency, is caused by mutations in the F7 gene, which provides instructions for making a protein called coagulation factor VII. This protein plays a critical role in the coagulation system, which is a series of chemical reactions that forms blood clots in response to injury. These mutations reduce the amount of coagulation factor VII in the bloodstream. Such a reduction prevents blood from clotting normally, causing episodes of excessive bleeding. It is not known why some people with this condition have problems with thrombosis. Researchers are also do not know what determines the severity of the condition; it does not appear to be related to the amount of coagulation factor VII in the bloodstream.

The noninherited form of the disorder, called acquired factor VII deficiency, is less common than the congenital form. It can be caused by liver disease or by blood cell disorders such as myeloma or aplastic anemia. Acquired factor VII deficiency can also be caused by certain drugs such as medicines that prevent clotting, or by a deficiency of vitamin K.

Inheritance and family implications

From: MedlinePlus Genetics, National Library of Medicine

Congenital factor VII deficiency is inherited in an autosomal recessive pattern, which means both copies of the F7 gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.

Acquired factor VII deficiency is not inherited.

How common is it?

From: MedlinePlus Genetics, National Library of Medicine

Factor VII deficiency is estimated to affect 1 in 300,000 to 1 in 500,000 people. It is the most frequently occurring of a group of disorders classified as rare bleeding disorders.

Understanding terms used in the source

These definitions explain medical words used above. A definition is not evidence that another condition is present, and it does not predict how a symptom will develop. Ask the clinician which terms apply to the actual examination or test result.

Menorrhagia

Prolonged and excessive menses at regular intervals in excess of 80 mL or lasting longer than 7 days.

Hematuria

The presence of blood in the urine. Hematuria may be gross hematuria (visible to the naked eye) or microscopic hematuria (detected by dipstick or microscopic examination of the urine).

Prolonged

Applied to an abnormality whose duration is extended over a longer period of time than is expected or usual (e.g., prolonged fever lasts longer than one usually sees with an infection).

Affected

This term applies to a family member who is diagnosed with the same condition as the individual who is the primary focus of investigation (the proband).

Which doctor should you see?

The suggested department for discussing Factor VII deficiency is Clinical Genetics, with a clinical geneticist as the relevant type of clinician. Paediatrician (children) or physician (adults), with clinical geneticist referral.

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.

• Does the exact genetic or chromosome finding explain the observed features?
• Would a genetic counsellor help the family understand the result?
• Which organ-specific assessments are appropriate for this particular diagnosis?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Factor VII deficiency. 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.