Journal
JOURNAL OF THE AMERICAN ACADEMY OF DERMATOLOGY
Volume 54, Issue 4, Pages 638-643Publisher
MOSBY-ELSEVIER
DOI: 10.1016/j.jaad.2005.11.1096
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Background: Reflectance confocal microscopy (RCM) is a high-resolution imaging tool for in vivo noninvasive evaluation of skin lesions. Objective: We Sought to describe the relevant RCM features for pigmented basal cell carcinoma (BCC). Methods: Pigmented skin lesions with a differential diagnosis of pigmented BCC were imaged using dermoscopy and RCM, followed by excision for histologic analysis. Results: RCM demonstrated aggregations of tightly packed cells with palisading, forming cordlike structures and nodules with irregular borders and variable brightness; these represented nests of pigmented basaloid tumor cells on histopathology, and blue-gray ovoid areas on dermoscopy. These tumor nests were associated with bright dendritic structures, identified histologically as either melanocytes or Langerhans cells, together with numerous bright oval to stellate-shaped structures with indistinct borders representing melanophages, and with highly refractile granules of melanin. Limitations: The pigmented BCCs imaged in this study were predominantly nodular; a different set or additional criteria may be necessary for detection of infiltrative and metatypical BCCs. Conclusion: RCM may permit in vivo diagnosis of pigmented BCC.
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