Q64.4 Malformation of urachus

Name of the Condition

• Malformation of Urachus (ICD-10 Code: Q64.4)

Summary

Malformation of the urachus refers to congenital abnormalities involving the urachus, a remnant of the fetal connection between the bladder and umbilicus. These defects may include patent urachus, urachal cysts, or diverticula, which can present with varying clinical implications.

Causes

The causes of urachal malformations are linked to incomplete regression of the urachus during fetal development. Genetic factors or disruptions in embryonic growth may contribute, though specific triggers are often not identifiable.

Risk Factors

• Family history of congenital urinary tract anomalies.
• Associated congenital defects (e.g., bladder exstrophy).
• Potential genetic predisposition, though no single gene has been definitively linked.

Symptoms

• Drainage from the umbilicus (in patent urachus).
• Abdominal pain or swelling (in urachal cysts or diverticula).
• Urinary tract infections or hematuria.
• Asymptomatic cases may be detected incidentally during imaging.

Diagnosis

Diagnosis typically involves imaging studies such as ultrasound, CT, or MRI to visualize the urachal structure. Physical examination may reveal umbilical drainage or a palpable mass. Urinalysis can assess for infection or hematuria.

Treatment Options

• Surgical excision for symptomatic or complicated cases (e.g., infected cysts).
• Antibiotic therapy for infections.
• Observation for asymptomatic or small lesions.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment. Follow-up may include imaging to monitor for recurrence or complications, especially after surgical intervention.

Complications

• Infection of urachal cysts or diverticula.
• Malignant transformation (rare).
• Urinary obstruction or incontinence (in patent urachus).

Lifestyle & Prevention

No specific preventive measures exist, as these are congenital. Maintaining good hygiene and prompt treatment of infections can reduce complications.

When to Seek Professional Help

Seek care if experiencing umbilical drainage, persistent abdominal pain, or signs of infection (e.g., fever, swelling).

Tips for Medical Coders

Document the specific type of urachal malformation (e.g., patent urachus, cyst) and any associated symptoms or complications. Ensure clinical correlation with imaging or physical exam findings to support coding accuracy.