Which are the symptoms of Congenital Insensitivity To Pain With Anhidrosis (CIPA)?

Congenital Insensitivity to Pain with Anhidrosis (CIPA), also known as Hereditary Sensory and Autonomic Neuropathy type IV (HSAN IV), is a rare genetic disorder characterized by the inability to feel pain, a lack of sweat production (anhidrosis), and recurrent unexplained fevers. These symptoms arise from the failure of peripheral nerves to develop properly, leading to significant challenges in sensing physical danger, regulating body temperature, and managing potential injuries.

What are the primary symptoms of CIPA?

The hallmark symptoms of Congenital Insensitivity to Pain with Anhidrosis (CIPA) involve a triad of clinical features that manifest early in life. Because patients lack the protective sensation of pain, they are prone to frequent, unnoticed injuries. Key clinical indicators include:

• Anhidrosis: A complete or nearly complete absence of sweat production, which prevents the body from cooling itself.


• Insensitivity to Pain: An inability to perceive noxious stimuli, which often leads to self-mutilation (such as biting the tongue or lips) and untreated fractures.


• Hyperpyrexia: Recurrent, severe fevers, often triggered by ambient heat because the body cannot regulate temperature through perspiration.


• Intellectual Disability: Many, though not all, individuals with Congenital Insensitivity to Pain with Anhidrosis (CIPA) experience varying degrees of developmental delays.

How does CIPA affect daily life and safety?

Daily quality of life for those with Congenital Insensitivity to Pain with Anhidrosis (CIPA) is primarily dictated by the need for constant vigilance. Without the "warning system" of pain, minor cuts, infected wounds, or bone fractures can go undetected, leading to severe complications like osteomyelitis (bone infection) or joint destruction. Caregivers must perform daily "head-to-toe" body checks to identify injuries that the patient cannot feel.

When should you seek immediate medical attention?

Immediate medical attention is required whenever a patient with Congenital Insensitivity to Pain with Anhidrosis (CIPA) experiences a fever, as this can quickly escalate into a life-threatening emergency. Additionally, any sign of redness, swelling, or unusual gait should be investigated immediately, as these may indicate underlying fractures or deep tissue infections that the patient cannot report.

How do symptoms progress over time?

While the anhidrosis and pain insensitivity are present from birth, the clinical presentation of Congenital Insensitivity to Pain with Anhidrosis (CIPA) can shift as the patient grows. Early childhood is often marked by self-mutilation and frequent fevers. As patients age, the cumulative damage to joints and bones—often referred to as neuropathic arthropathy—becomes the primary focus of long-term medical management.

Next steps

• Consult a specialized neurologist or geneticist to confirm the diagnosis through genetic testing (NTRK1 gene mutation).


• Establish a strict daily routine for skin and joint examinations to prevent infection.


• Connect with the Congenital Insensitivity to Pain with Anhidrosis (CIPA) community at DiseaseMaps.org to share experiences with other families.


• Work with a multidisciplinary team, including orthopedists, physical therapists, and pediatricians, to manage complex symptoms.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment from a qualified healthcare provider.

References

• National Institutes of Health (NIH) - Genetic and Rare Diseases Information Center (GARD).


• Orphanet: Congenital insensitivity to pain with anhidrosis (ORPHA:93574).


• Online Mendelian Inheritance in Man (OMIM): #256800.