Keratoacanthoma is a rapidly growing cutaneous tumor with a histopathologic pattern often suggestive of a squamous cell carcinoma (SCC). It may be viewed as an aborted malignancy which only rarely progresses into an aggressive SCC. It is most likely arising from hair follicle that has the tendency of spontaneous resolution. The diagnosis of keratoacanthoma is based on clinical, histopathologic features and biologic behavior. A 75-year-old woman presented with a 1-month history of a rapidly enlarging exophytic tumor on the lower lip. A biopsy was performed leading to a diagnosis of keratoacanthoma. We report a case of keratoacanthoma on the lower lip, because the mucosal area is an unexpected location.
Aged ; Biopsy ; Carcinoma, Squamous Cell ; Diagnosis ; Female ; Hair Follicle ; Humans ; Keratoacanthoma* ; Lip*

Hypertrophic lupus erythematosus is a clinical variant of chronic cutaneous lupus erythematosus (CCLE). It is critical to differentiate hypertrophic lupus erythematosus from CCLE because of treatment and prognosis. We report a case of hypertrophic lupus erythematosus with CCLE occured on arms. Combination therapy with acitretin and intralesional corticosteroid injection resulted in control of previously refractory skin lesion.
Acitretin ; Arm ; Lupus Erythematosus, Cutaneous ; Prognosis ; Skin

Green nail syndrome is a chronic nail infection by Pseudomonas aeurginosa. Infected lesions can involve both finger and toe nails and cause greenish discoloration and onycholysis. Environmental factors such as frequent hydration and external trauma are predisposing factors. A 37-year-old patient was diagnosed with green nail syndrome on the right thumb. She used a thimble for a long time as a dress designer. Herein, we describe an uncommon case of green nail syndrome by chronic thimble use as a rare and an educational report.
Adult ; Fingers ; Humans ; Nails ; Onycholysis ; Pseudomonas ; Pseudomonas aeruginosa ; Serratia marcescens ; Thumb ; Toes