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Case report
Dermoscopic features of an unusual case of targetoid hemosiderotic nevus
Sun Mun Jeong, Jang Hwan Jung, Do Ik Kwon, Seol Hwa Seong, Ji Yun Jang, Jong Bin Park, Min Soo Jang
Kosin Med J. 2023;38(3):215-218.   Published online February 15, 2023
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Abstract PDFPubReader   ePub   
Targetoid hemosiderotic nevus (THN) is a rare variant of melanocytic nevus, characterized by a sudden development of a targetoid ecchymotic halo around a pre-existing nevus. THN clinically raises concern for malignant transformation due to its abrupt change in color and size. THN should be distinguished from other diseases showing a peripheral halo, including targetoid hemosiderotic hemangioma, halo nevus, and Meyerson nevus. Dermoscopy can help clinicians to differentiate THN from these diseases. The typical dermoscopic features of THN are known to be divided into two distinctive areas: the central melanocytic area and the peripheral ecchymotic area. In our case, dermoscopy revealed a novel bull’s eye pattern composed of a central area with characteristic features of benign melanocytic nevus, an intermediated white circular ring, and a peripheral milky red area. When a sudden change occurs in a pre-existing nodule showing targetoid features, dermoscopy should be considered before conducting a biopsy or surgical intervention.
Original article
Clinical Features and Histological Findings of 17 Patients with Chronic Actinic Dermatitis
Min Soo Jang, Kang Hoon Lee, Sang Hwa Han, Jong Bin Park, Dong Young Kang, Sang Tae Kim, Kee Suck Suh
Kosin Med J. 2013;28(2):145-153.   Published online January 19, 2013
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Abstract PDFPubReader   ePub   

This study was designed to evaluate the clinical, histological and immunohistochemical findings and treatment of chronic actinic dermatitis in Korean patients.


Seventeen Korean patients with chronic actinic dermatitis were enrolled for this study. The clinical and histological findings and the results of phototest were reviewed with medical records, clinical photographs and pathologic slides. We also reviewed the effectiveness of the treatments in all patients with chronic actinic dermatitis.


In all patients with chronic actinic dermatitis, pruritus was severe, and the patients present in the early stages with erythemas on the face, neck and the back of the hands. As the eruption progresses, it became lichenified and scaly plaques and papules developed. The face, upper extremity and neck were most commonly affected. The most common abnormal results of the phototests were decreased MED-UVB alone. In 8 patients with actinic reticuloid, histopathologic findings showed irregular acanthosis, parakeratosis, spongiosis, atypical hyperchromatic cells with cerebriform nuclei, epidermotropism, Pautrier-like microabscess, deep perivascular lymphocytic infiltrates, vertically-streaked collagen in the papillary dermis, stellate and multinucleated fibroblasts. Treatment includes topical tacrolimus and corticosteroid, oral corticosteroid, azathioprine and cyclosporine.


Our study showed classic clinical and histological findings. The most common abnormal results of the phototests were decreased MED-UVB alone. Topical steroid, tacrolimus and systemic cyclosporine, azathioprine are effective in treating chronic actinic dermatitis.

KMJ : Kosin Medical Journal