Convex Right Thoracic Structural Scoliosis: This is the most likely diagnosis because the patient has a rib hump on the right side, which is a common sign of structural scoliosis. The fact that the rib hump reduces when she bends forward and to the right suggests that the curve is structural and not just functional.

Convex Left Thoracic Structural Scoliosis: Although the rib hump is on the right side, it's possible that the curve is actually convex to the left, and the rib hump is a secondary sign. However, this would be less likely given the information provided.
Convex Right Thoracic Functional Scoliosis: Functional scoliosis can cause a curve in the spine, but it's typically less severe and more flexible than structural scoliosis. The fact that the rib hump reduces with bending suggests that this could be a possibility, but it's less likely than structural scoliosis.

Spinal Tumors or Infections: Although rare, spinal tumors or infections can cause scoliosis, and missing these diagnoses could be devastating. It's essential to consider these possibilities, especially if the patient has other symptoms such as pain, fever, or neurological deficits.
Neuromuscular Scoliosis: Certain neuromuscular conditions, such as muscular dystrophy or cerebral palsy, can cause scoliosis. Missing these diagnoses could lead to delayed treatment and poor outcomes.

Convex Left Thoracolumbar Rotoscoliosis: This is a rare condition that involves a rotational deformity of the spine. While it's possible, it's less likely given the information provided, and other diagnoses should be considered first.
Congenital Scoliosis: This is a rare condition that is present at birth. While it's possible, it's less likely in a 10-year-old girl who has just developed a curve in her back.