Metastatic Lung Cancer to the Distal Finger Presenting as Osteomyelitis

Area of Science:

• Oncology
• Radiology
• Pathology

Background:

• Distal phalanx metastasis is rare and frequently misdiagnosed as osteomyelitis due to similar clinical and radiological presentations.
• Trauma can complicate the diagnosis of distal phalanx metastasis, potentially mimicking infection.

Observation:

• A 69-year-old male smoker presented with a painful swollen finger after laceration, initially treated unsuccessfully for osteomyelitis.
• Imaging revealed a lung mass, and biopsies confirmed poorly differentiated carcinoma in both the lung and finger.

Findings:

• The patient's finger condition was a metastasis from a primary lung carcinoma.
• Trauma may facilitate metastasis by releasing wound-healing factors that support tumor cell growth.

Implications:

• This case highlights the importance of considering malignancy in cases of distal phalanx lesions, especially with a history of trauma.
• Understanding the role of wound-healing factors in metastasis could lead to novel therapeutic targets for certain cancers.