Generalized Annular Lichen Planus / 대한피부과학회지

Generalized annular lichen planus is rarely described and is characterized by generalized flexural eruptions without involvement of oral mucosa. A 43-year-old male presented with mildly pruritic erythematous to brownish annular macules, confluent patches with peripheral elevated rim for 5 months. The annular lesions involved abdomen, back, upper and lower extremities, predominantly distributed on flexural areas such as both axillae, inguinal areas and popliteal fossae. Histopathologic features from abdomen lesion were compatible with lichen planus. The patient was treated with methylprednisolone, hydrochloroquine and dapsone for 8 weeks and all erythematous lesions disappeared with remaining marked hyperpigmentation.

A Case of Annular Lichen Planus Associated with Periungual Lesions / 대한피부과학회지

We report a case of annular lichen planus occurred in the hands and feet area, which also showed nail dystrophy and annular or polycyclic plaques on the proximal and lateral nail folds. Annular lesions of lichen planus have been reported mainly in glans penis area of male patients, but predominantly annular variant occurred in other body sites is quite rare and was reported exclusively in black patients. Our case is interesting in that the patient had periungual lesions of lichen planus as well as its rare annular configurations localized to hands and feet.

A Case of Generalized Annular Lichen Planus Controlled by Erythromycin / 대한피부과학회지

A 69-year-old man presented with annular lichen planus involving both forearms, hand dorsa, wrists, inner sides of the thighs, knees and ankles. He was treated initially with systemic corticosteroids and etretinate, but rernission and recurr ence of the skin lesions were observed. During the follow-up, we found erythrasma on all his toewebs and both soles. After administration of erythromycin for the treatment of erythrasma, lesions of the lichen planus rapidly improved. Five months later, some lesions of lihen planus and erythrasma had recurred. After administration of erythromycin, the lesions of lichen planus improved again. No recurrence was observed for the following 8 months. We suspect that eradication of the chronic focus of infection and the anti-inflammatory effect, of erythromycin may lead to supression of abnormal immunological reactions and resolution of lichen planus.