This may be useful in distinguishing between a swelling composed of solid tissue and one consisting of transparent or semi transparent liquid. For example, the sign may help to distinguish a hydrocele from other scrotal swellings (p. 172). It requires to be borne in mind that a testicular tumour may lie within a hydrocele.
• A swelling which Is suddenly found may not have recently developed.
• The shape and size of any swelling should be defined and measured
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