title: Spinal cord compression by heterotopic ossification associated with pseudohypoparathyroidism.
abstract: This report describes a 37-year-old man presenting with a gait disturbance due to spastic paraparesis. Physical findings showed typical features of Albright's hereditary osteodystrophy, including short stature, obesity, brachydactyly and dental hypoplasia. He was diagnosed as having pseudohypoparathyroidism type Ia, on the basis of his hypocalcaemia, hyperphosphataemia, increased plasma level of parathyroid hormone (PTH), and the unresponsiveness to exogenous PTH loading of his urinary excretion of both nephrogenous cyclic adenosine monophosphate and phosphate. Magnetic resonance imaging and myelographic computed tomographic scans clearly demonstrated severe compression of the spinal cord at T 9/10 by tumour-like ossifications of the paravertebral ligaments. Neurosurgical decompression therapy was, therefore, performed to alleviate his spastic paraparesis. This was a rare case of pseudohypoparathyroidism complicated with spinal cord compression caused by ectopic ossification of the ligaments.
authors.affiliation: Department of Internal Medicine, Kanazawa National Hospital, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Noto
authors.forename: M
authors.initials: M
authors.lastname: Saito
authors.forename: H
authors.initials: H
authors.lastname: Ichizen
authors.forename: H
authors.initials: H
authors.lastname: Kida
mesh_terms: D000328:Adult; D002118:Calcium / Q000097:blood; D000242:Cyclic AMP / Q000652:urine; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009999:Ossification, Heterotopic / Q000150:complications* / Q000175:diagnosis; D015493:Paraparesis, Tropical Spastic / Q000150:complications; D010281:Parathyroid Hormone / Q000097:blood; D010710:Phosphates / Q000097:blood / Q000652:urine; D011547:Pseudohypoparathyroidism / Q000150:complications* / Q000175:diagnosis; D013117:Spinal Cord Compression / Q000150:complications* / Q000175:diagnosis; D014057:Tomography, X-Ray Computed
chemical_list: D010281:Parathyroid Hormone; D010710:Phosphates; D000242:Cyclic AMP; D002118:Calcium