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Cyclist's nodule: no smooth ride.

Adam Stoneham1, Khin Thway2, Christina Messiou3

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Summary
This summary is machine-generated.

Perineal nodular induration, a rare benign tumor caused by repetitive trauma from cycling, can present as a perineal mass. Early specialist referral and considering patient hobbies are crucial for accurate diagnosis.

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Area of Science:

  • Surgical Oncology
  • Dermatopathology
  • Sports Medicine

Background:

  • Soft tissue tumors can manifest as unexplained lumps or bumps.
  • The perineum is an unusual but possible location for soft tissue tumors.
  • Patient occupation and hobbies are important diagnostic considerations.

Observation:

  • A cyclist presented with a slowly growing perineal mass.
  • Imaging and biopsy confirmed perineal nodular induration.
  • This condition is linked to repetitive trauma from 'saddle sports'.

Findings:

  • Perineal nodular induration is a rare, benign soft tissue tumor.
  • Repetitive trauma from cycling or horse riding is the cause.
  • The mass can be mistaken for a 'third testicle' in men.

Implications:

  • Highlights the importance of prompt specialist referral from primary care.
  • Emphasizes considering lifestyle factors in differential diagnoses.
  • Underscores the need for awareness of rare soft tissue tumors in the perineal region.