Growth hormone and segmental growth in survivors of head and neck embryonal rhabdomyosarcoma

Aims-To assess the impact of treatment for embryonal rhabdomyosarcoma on sp inal growth and limb length and examine the response of these parameters to growth hormone (GH) treatment. Methods-We conducted a retrospective case note review of 17 survivors of he ad and neck rhabdomyosarcoma followed up at a single institution. All child ren had been treated with chemotherapy and local radiotherapy. Growth veloc ity, height, sitting height, and subischial limb length SDS scores were ana lysed. Results-Growth failure secondary to isolated GH deficiency (GHD) developed in 7/17 patients. GHD occurred at a median (range) of 3.4 (1.3-9.9) years a fter radiotherapy tumour doses of 46 (40-50) Gy. Growth velocity, height, a nd subischial limb length SDS were significantly reduced in the GHD group a nd improved with GH therapy. Conclusions-GH treatment resulted in a significant improvement in sitting h eight SDS. We discuss the unexpected improvement in spinal growth in surviv ors with GHD.