'Dalmatian dog'-like skin eruption (two cases of multifocal fixed drug eruption induced by mefenamic acid).

Mefenamic acid is a common widely prescribed drug with analgesic activity. Authors report two cases of multifocal fixed drug eruption induced by mefenamic acid. Cases were diagnosed on basis of clinical examination and histopathology of skin lesion.

Seborrhoeic keratosis or occult malignant neoplasm of the skin?

Background: Seborrhoeic keratosis is generally considered to be a benign lesion of the skin.

Observation: We present the case of a 68-year-old male who presented with clinically typical seborrhoeic keratosis that later histological examination showed partially covered an occult basal cell carcinoma.

Objective: To have an indication of what percentage of clinically apparent seborrhoeic keratoses may be associated with some form of histologically proven skin malignancy.

Intraosseous lipoma. A report of three cases.

Intraosseous lipomas are considered to be among the rarest primary benign bone tumors. Lipoma developing in bone frequently presents evolutional changes, which in association with the lack of clinical information and the radiographic appearance of the bone lesion could be the main reasons for misinterpretation of the histological picture. We present three cases of intraosseous lipoma which developed in male patients aged 23, 34 and 35 years, involving the tibia (n = 2) and calcaneus (n = 1).