This article describes clinical, serologic, and histopathologic features of the first North American cohort of patients with positive anti-p200 serology identified at Mayo Clinic, Rochester, Minnesota, USA and Beutner Laboratories, Buffalo, New York, USA. Forty-seven patients were identified with positive p200 laminin beta 4 autoantibodies, detected with either immunoglobulin (Ig)G or IgG4 modified indirect immunofluorescence on HEK293 cells transfected with recombinant laminin beta.
Severe Necrotizing Locally Advanced Basal Cell Carcinoma With Osteomyelitis
Advances in Skin & Wound Care | February 26, 2026 | Volume: 39 | Issue: 3 | Pages: E163-E165
Locally advanced basal cell carcinoma (BCC) is an uncommon and complex presentation of BCC. These tumors can present as extensive nonhealing ulcers and require skin biopsy to rule out other causes, including malignant, infectious, and inflammatory etiologies. In this case report, a 57-year-old female without significant past medical history presented with a 5-year history of a chronic progressive ulcer involving the neck and back. Histopathological study of the tissue identified nodular and infiltrative BCC, prompting further multidisciplinary treatment and management with vismodegib, radiation, and surgery.