Bullous pemphigoid and metastatic skin cancer

A case of bullous pemphigoid associated with metastatic squamous cell carcinoma of the skin from the oral cavity, is described. Such an association of these two uncommon entities does not appear to have been reported previously.

The effect of cycloheximide on mouse learning

Mice were trained in an avoidance learning task. The incorporation of 3H-leucine into the hippocampal regions of trained mice was higher than that of control mice. When mice were injected with cycloheximide, a strong inhibitor of protein synthesis, impairment was evident in acquisition of learning. Cycloheximide produced morphological changes in mitochondria and microtubules of some brain axons. It is suggested that the cycloheximide-induced learning impairment may be due to the blocking of the synthesis of the specific protein necessary of neutral conductivity.