Musculoskeletal Disorders in Children

A 4-yr old male child presents with muscle weakness. His mother tells that her child has difficulty climbing stairs and getting up from the floor. On muscle biopsy, small muscle fibrils and absent of dystrophin was found. what is the diagnosis out of given options?

A 6-year-old girl born out of nonconsanguineous marriage presented with rachitic changes in limbs since 2 years of age for which she has received multiple courses of vitamin D. Investigations showed the following. What is the most likely diagnosis? Parameter Calcium Phosphate Alkaline Phosphatase (ALP) Serum Parathyroid hormone (PTH) Serum electrolytes Lab determined value 9.5 mg/dl 1.6 mg/dl 814 IU Normal levels Within Normal Limits (WNL) Serum creatinine Within Normal Limits (WNL) Arterial Blood Gas analysis (ABG) Within Normal Limits (WNL)

A male child presented with arthralgia and abdominal pain. On examination, there was palpable purpura over the lower limbs. There is a past history of upper respiratory tract infection prior to the onset of presenting symptoms. Which of the following is the treatment for this condition?

A young child presents with progressive bowing of both lower extremities. His older brother exhibits identical skeletal deformities, whereas his sister and parents are unaffected. They consume an adequate diet. Investigations show normal serum calcium, normal 25(OH) vitamin D, low serum phosphate, and tubular maximum reabsorption of phosphate per GFR (TmP/GFR) <80%. What is the most likely diagnosis?