The raindrop skull appearance of calvarial multiple myeloma is the presence of multiple, well-defined lytic lesions (punched out lesions) of various size scattered throughout the skull. This term is applied as an analogy to rain hitting a surface and splashing, where it leaves a random pattern of dark spots.
Occasionally, the term is used synonymous (although inaccurately) with the pepper pot skull appearance of multiple lytic lesions of hyperparathyroidism 4.
Unable to process the form. Check for errors and try again.