The genetic basis for familial phaeochromocytoma is unknown in many cases.
Since the disorder has been reported in some cases of familial head and nec
k paraganglioma, which is caused by a mutation in the gene encoding succina
te dehydrogenase complex subunit D (SDHD), we investigated this gene in kin
dreds with familial phaeochromocytoma. A germline SDHD frameshift mutation
was identified in a two-generation family consisting of four children with
phaeochromocytoma, but somatic mutations were not detected in 24 sporadic p
haeochromocytoma tumours. Germline SDHD mutation analysis should be done in
individuals with familial, multiple, or early-onset phaeochromocytomas eve
n if a personal or family history of head and neck paraganglioma is absent.