How do I know if I have Congenital Insensitivity To Pain With Anhidrosis (CIPA)?

Congenital Insensitivity to Pain with Anhidrosis (CIPA), also known as Hereditary Sensory and Autonomic Neuropathy type IV, is a rare genetic disorder characterized by an inability to feel pain and a lack of sweat production. A diagnosis is typically suspected in infancy when a child fails to react to injuries or exhibits recurrent, unexplained high fevers due to an inability to regulate body temperature.

What are the primary clinical signs of CIPA?

The hallmark of Congenital Insensitivity to Pain with Anhidrosis (CIPA) is the triad of anhidrosis (inability to sweat), insensitivity to pain, and intellectual disability. Because individuals with Congenital Insensitivity to Pain with Anhidrosis (CIPA) cannot perceive pain, they are at high risk for unrecognized fractures, infections, and self-mutilation. Caregivers often first notice that a child does not cry when injured or suffers from frequent, severe fevers, particularly in warm environments.

How is CIPA diagnosed and what tests should I request?

Diagnosis of Congenital Insensitivity to Pain with Anhidrosis (CIPA) is confirmed through a combination of clinical evaluation and genetic testing. If you suspect this condition, you should request a consultation with a clinical geneticist or a neurologist specializing in peripheral neuropathies. Key diagnostic steps include:

• Genetic Testing: Molecular analysis of the NTRK1 gene, which is mutated in nearly all cases of Congenital Insensitivity to Pain with Anhidrosis (CIPA).


• Sweat Testing: Quantitative sudomotor axon reflex testing (QSART) to confirm the total absence of sweating.


• Neurological Assessment: Nerve conduction studies and skin biopsies to assess the lack of small nerve fibers.

When should I seek urgent medical evaluation?

Because individuals with Congenital Insensitivity to Pain with Anhidrosis (CIPA) do not feel pain, they may have severe underlying injuries—such as appendicitis, bone fractures, or infected wounds—without presenting the typical "red flags" like localized tenderness. Seek emergency care immediately if you observe unexplained lethargy, sudden high fevers, or signs of infection like redness or swelling, even in the absence of pain.

Next steps

• Consult with a geneticist to discuss NTRK1 gene sequencing.


• Keep a detailed log of body temperature fluctuations and unexplained injuries.


• Connect with the 6 members of the DiseaseMaps community who share experiences with Congenital Insensitivity to Pain with Anhidrosis (CIPA).


• If your concerns are dismissed, request a referral to an academic medical center or a rare disease specialist.

Medical disclaimer: This information is for educational purposes only and does not constitute medical advice; always consult with a qualified healthcare professional regarding diagnostic concerns.

References

• NIH Genetic and Rare Diseases Information Center (GARD): CIPA entry.


• Orphanet: Hereditary Sensory and Autonomic Neuropathy Type IV.


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


• PubMed: Clinical literature on NTRK1 mutations and sensory neuropathies.