<prompt> X-ray features of Hypoparathyroidism are the following exceptOsteosclerosisCalvarial thickeningSubperiosteal resorptionSubcutaneous calcification  <response>: Ans. c Subperiosteal resorption Ref RRM 6th107HYPOPARATHYROIDISM Tetany hypocalcemic neuromuscular excitability numbness, cramps, carpopedal spasm, laryngeal stridor, general-ized convulsions Hypocalcemia hyperphosphatemia Normallow serum alkaline phosphatase Hypoplasia of tooth enamel dentine; blunting of roots Radiological features:- Premature closure of epiphyses- Generalized increase in bone density in 9deg- Calvarial thickening0- Sacroiliac sclerosis- Bandlike density in metaphysis of long bones 25, iliac crest, vertebral bodies- Thickened lamina dura inner table widened diploe- Deformed hips with thickening sclerosis of femoral head acetabulum- Intracranial calcifications in basal ganglia, choroid plexus, occasionally in cerebellum- Calcification of spinal and other ligaments- Subcutaneous calcifications0- Ossification of muscle insertions- Ectopic bone formationHYPERPARATHYROIDISM:Protrusio acetabuliOsteopenia in primaryOsteosclerosis in secondaryLoss of lamina duraSubperiosteal resorption earliest - radial aspect of middle phalanges of 23 digitsPepper-Pot skull platyspondyli 