Q71.11 Congenital absence of right upper arm and forearm with hand present

Name of the Condition

• Congenital absence of right upper arm and forearm with hand present

Summary

Congenital absence of the right upper arm and forearm with hand present is a limb reduction defect where the upper arm and forearm are absent, but the hand is present. This condition affects the right side and can impact functional abilities, though the presence of the hand may allow for some adaptive use.

Causes

The exact causes are often unknown but may involve genetic factors, chromosomal abnormalities, or environmental influences during pregnancy. Disruptions to normal fetal limb development, such as vascular issues or teratogenic exposures, are also implicated.

Risk Factors

• Genetic predispositions or family history of limb defects.
• Maternal exposure to certain medications, chemicals, or infections during pregnancy.
• Maternal conditions like diabetes or autoimmune disorders.
• Advanced maternal age.

Symptoms

• Visible absence of the right upper arm and forearm at birth.
• Presence of the hand, which may be positioned abnormally or have associated malformations.
• Potential limitations in movement, strength, or dexterity of the affected limb.

Diagnosis

Diagnosis is typically made at birth through physical examination. Prenatal ultrasounds may detect limb abnormalities before delivery, though the specific absence of the upper arm and forearm with hand present can be challenging to identify prenatally.

Treatment Options

• Prosthetic fitting to enhance functionality and independence.
• Occupational therapy to develop adaptive skills using the hand and remaining limb structures.
• Surgical interventions to improve limb stump functionality or address associated anomalies.

Prognosis and Follow-Up

With modern prosthetics and supportive therapies, individuals can achieve functional independence. Regular follow-up with orthopedic specialists and therapists is important to monitor development and adjust interventions as needed.

Complications

• Potential for secondary musculoskeletal issues due to altered biomechanics.
• Psychological or social challenges related to limb difference.
• Increased risk of injury to the remaining limb or hand.

Lifestyle & Prevention

• Early intervention with therapy to maximize functional use of the hand.
• Adaptive equipment to support daily activities.
• Genetic counseling for families with a history of limb defects.

When to Seek Professional Help

Seek medical evaluation if a newborn shows signs of limb absence or malformation. Prompt diagnosis and intervention can improve long-term outcomes.

Tips for Medical Coders

Document the specific absence of the right upper arm and forearm with hand present to ensure accurate coding. Include details about the hand's presence and any associated anomalies to support the diagnosis. Verify laterality (right) and the absence of the upper arm and forearm while confirming the hand is present.