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Q. I have a problem with mold in my bathroom shower ceiling area. A number of events have occurred to enhance this situation: (1) water leak from pipes located above shower stall, (2) flat enamel paint used on the ceiling, and (3) bathroom being located in the basement.

A. Surfaces affected by mold and mildew need to be cleaned and disinfected with a bleach/water solution. Then, seal with a couple of coats of primer/sealer like Zinnser. Repaint with washable paint. Or, if the shower is enclosed and you plan on retiling the shower, you can tile the ceiling too. Retiling will require removal of tile, grout, and mastic on concrete underlayment board to provide a smooth, clean surface for installing new tile.
Improving the ventilation in the bathroom, especially in the shower area, will tend to minimize mold/mildew problems. Keeping surfaces dry and clean will also keep mildew at bay.