What is the appropriate management for an 80-year-old patient with a pea-sized, progressively enlarging bump on the right ear that has been present for over a year?

Refer to Dermatology for Biopsy or Excision

You should refer this patient to dermatology for diagnostic biopsy or excision of this progressively enlarging ear lesion, as the ear is a high-risk site for squamous cell carcinoma with increased metastatic potential, and any growing lesion in an elderly patient warrants histological diagnosis.

Why the Ear Demands Urgent Attention

The ear is not just another body site—it carries significantly higher stakes. The risk of metastasis is substantially higher when SCC arises on the ear 1. This means any progressively enlarging lesion on the ear in an 80-year-old patient cannot be observed or treated empirically. The guideline explicitly states that histological diagnosis of any thicker lesions at this site is recommended to differentiate benign conditions from invasive SCC 1.

Key Clinical Red Flags Present in Your Patient

• Progressive growth over one year: Benign lesions typically stabilize; continued growth raises concern
• Elderly patient (80 years): Peak age for cutaneous malignancies, particularly SCC
• Ear location: High-risk anatomic site with worse prognosis if malignant
• Pea-sized (approximately 1 cm): Large enough to warrant tissue diagnosis

The Differential Diagnosis You're Facing

While the evidence discusses various benign ear lesions—pilomatricoma 2, seborrheic keratosis 3, hidradenoma 4, and atypical fibroxanthoma 5—none of these can be reliably distinguished from malignancy without histopathology. The case reports consistently emphasize that even experienced clinicians required tissue diagnosis for definitive management.

What NOT to Do

• Do not observe: The guideline explicitly states that "failure of an individual lesion to respond to physical therapy indicates a need for further evaluation. This could include formal excision" 1. Your lesion has already "failed" observation by continuing to grow.
• Do not attempt cryotherapy or empiric treatment: Without knowing what you're treating, you risk inadequate treatment of malignancy or unnecessary morbidity from treating a benign lesion incorrectly.

Your Action Plan as PCP

1. Refer to dermatology (preferred) or surgical specialist with expertise in skin lesions
2. Document: Size, exact location on ear (helix, lobe, concha, etc.), texture (firm, soft, fixed), color, surface characteristics
3. Expedite referral if any concerning features: ulceration, bleeding, rapid growth acceleration, or fixation to underlying structures

The Definitive Management Path

Once referred, the specialist will likely perform either:

• Shave or punch biopsy for initial diagnosis if clinical suspicion is lower
• Complete excision with histology if clinical concern is higher—this serves as both diagnostic and therapeutic 1

The guideline is clear: "Histological diagnosis of any thicker AKs to differentiate them from invasive SCC by shave biopsy or excision is recommended" 1. While your lesion may not be an actinic keratosis, the principle applies to any suspicious ear lesion in this age group.

Common Pitfall to Avoid

Do not be falsely reassured by the lesion's benign appearance or slow initial growth. Multiple case reports demonstrate that even experienced clinicians faced "diagnostic uncertainty" and "clinicopathological discordance" with ear lesions 2, 3. The ear's unique anatomy and high malignancy risk make tissue diagnosis mandatory, not optional.