Mohs Surgery for Skin Cancer of the Ear

The ear receives significant cumulative sun exposure, and the skin is thin and tightly adherent to underlying cartilage. Skin cancer on the ear is most often squamous cell carcinoma, particularly on the helical rim, but basal cell carcinoma is also common.

Two factors make ear skin cancer surgery distinctive: the cartilage framework gives the ear its shape and is easily distorted by careless reconstruction, and the ear is positioned at the entrance to the external auditory canal so reconstruction must not narrow or obstruct it. Mohs micrographic surgery is the preferred treatment because it removes the cancer while preserving as much normal skin and cartilage as possible.

The external ear is divided into anatomic subunits including the helix, antihelix, scapha, triangular fossa, conchal bowl, tragus, antitragus, and lobule. Each subunit has different skin thickness, cartilage support, and cosmetic visibility, and the reconstruction approach varies accordingly.

The helical rim is the most common site for skin cancer on the ear. Cancers here often involve the underlying cartilage and require careful resection and repair to avoid notching or contour deformity. Cancers on the conchal bowl involve thinner skin and tighter adherence to the underlying cartilage, and the post-auricular skin behind the ear is a valuable donor site for reconstruction.

In Mohs micrographic surgery for ear skin cancer, the visible tumor and a thin margin of surrounding tissue are removed under local anesthesia. The tissue is then processed and examined by Dr. Lopez under a microscope while you wait. If any cancer cells remain at the margin, only that specific area is removed in the next stage, leaving healthy tissue intact. The process is repeated until the margins are clear.

Most ear Mohs cases are completed in one or two stages. Dr. Lopez averages 1.4 stages per Mohs case on head and neck sites. The single-day, margin-controlled approach is particularly important on the ear because of the limited amount of normal skin available for reconstruction. Mohs achieves cure rates up to 99 percent for basal cell carcinoma and squamous cell carcinoma.

After the cancer is fully removed, the defect is reconstructed. Most ear defects can be closed with relatively straightforward techniques. The reconstruction approach depends on defect size, location, and whether the underlying cartilage is involved.

Common reconstruction techniques Dr. Lopez performs in house include:

• Primary closure or healing by secondary intention for smaller defects, particularly in the conchal bowl where secondary intention often gives an excellent cosmetic result
• Wedge resection of the helical rim for full-thickness defects involving the helix and underlying cartilage
• Local flaps including advancement flaps and rotation flaps from adjacent ear skin or pre-auricular skin
• Full-thickness skin grafts, typically harvested from the post-auricular skin or supraclavicular area

Dr. Lopez performs 99 percent of his own reconstructions, choosing the simplest technique that will preserve the shape and structure of the ear. Tumor removal and reconstruction are completed on the same day, in the same visit.

Dr. Lopez has personally performed over 10,000 Mohs micrographic surgery procedures since completing his Mayo Clinic fellowship in 2018, with 1,757 cases performed in 2025. The head and neck are his most common treatment sites. In 2025, 1,288 of his Mohs cases (73 percent) were performed on the head, neck, or other anatomically sensitive sites, of which the ear is a frequent location, particularly for squamous cell carcinoma of the helical rim.

Dr. Lopez accepts referrals for ear skin cancer cases from dermatologists, primary care physicians, plastic surgeons, oculoplastic surgeons, facial plastic surgeons, and radiation oncologists across Tampa Bay.

Most patients are scheduled for a same-day consultation, Mohs procedure, and reconstruction in a single visit. You arrive in the morning, the cancer is removed, tissue is examined while you wait, and reconstruction is completed once the margins are clear. You leave the office the same day with the cancer gone and the wound closed.