A Case of Actinomycosis Presenting as an Oral Ulcer in a Healthy Child / 대한의진균학회지

Actinomycosis is a chronic suppurative and granulomatous bacterial infection most commonly presenting as an abscess, soft tissue swelling, or mass in the cervicofacial region. Although the organisms often invade soft tissues through damaged oral mucosa, actinomycosis presenting acutely as a superficial oral ulcer is extremely rare. We report a case of actinomycosis in a 6-year-old boy who presented a painful ulcer on the right buccal mucosa. Histopathologic examination showed sulfur granules and granulation tissue with mixed inflammatory infiltrate in the dermis. The granules contained numerous Gram-positive filamentous organisms consistent with actinomycosis. We propose that actinomycosis should be kept in mind in the diagnosis of oral ulcerations.

A Case of Sebaceous Carcinoma Arising from Bowen's Disease / 대한피부과학회지

Bowen's disease is an intraepidermal squamous cell carcinoma. Although an invasive squamous cell carcinoma occasionally develops from Bowen's disease, the development of sebaceous carcinoma from Bowen's disease is very rare. We report a case of sebaceous carcinoma arising from Bowen's disease occurring on the cheek in a 72-year-old female. She presented with a crust and erythematous scaly papule on the face. Histopathologic examination of the crusted lesion showed atypical tumor cells with large, hyperchromatic nuclei and frequent mitoses in the epidermis suggesting of Bowen's disease. However, the scaly papule showed tumor lobule composed of clear cells with foamy cytoplasm and atypical undifferentiated cells suggesting of sebaceous carcinoma. CK7 staining was positive only for the tumors cells of the specimen from the scaly papule. The positive staining of CK7 may help distinguish sebaceous carcinoma from clear cell squamous cell carcinoma when that distinction can not be clearly made by light microscopy alone.

Cutis Marmorata Telangiectatica Congenita: A Rare Clinical Manifestation of Capillary Hemangioma?

A Histologic finding of the Cutis marmorata telangiectatica congenita( CMTC) is non-specific, but dilated capillaries and increased number of vessels are often observed. Capillary hemangioma, mostly represented by strawberry nevus, may show various clinical manifestations. We report a case of Cutis marmorata telangiectatica congenita, which may be an unusual clinical presentation of capillary hemangioma.