A Gibbus Deformity is a form of structural kyphosis

Kyphosis

Kyphosis , also called roundback or Kelso's hunchback, is a condition of over-curvature of the thoracic vertebrae...

, where one or more adjacent vertebrae become wedged. Gibbus deformity can be a sequela

Sequela

A sequela) is a pathological condition resulting from a disease, injury, or other trauma.Chronic kidney disease, for example, is sometimes a sequela of diabetes, and neck pain is a common sequela of whiplash or other trauma to the cervical vertebrae. Post-traumatic stress disorder may be a...

 of advanced skeletal tuberculosis

Tuberculosis

Tuberculosis, MTB, or TB is a common, and in many cases lethal, infectious disease caused by various strains of mycobacteria, usually Mycobacterium tuberculosis. Tuberculosis usually attacks the lungs but can also affect other parts of the body...

 and is the result of collapse of vertebral bodies. This can in turn lead to spinal cord compression causing paraplegia

Paraplegia

Paraplegia is an impairment in motor or sensory function of the lower extremities. The word comes from Ionic Greek: παραπληγίη "half-striking". It is usually the result of spinal cord injury or a congenital condition such as spina bifida that affects the neural elements of the spinal canal...

.

When viewed from behind, the deformity

Deformity

A deformity, dysmorphism, or dysmorphic feature is a major difference in the shape of body part or organ compared to the average shape of that part.Deformity may arise from numerous causes:*A Genetic mutation*Damage to the fetus or uterus...

 is sharply angled, with the resulting humpback

Humpback

Humpback may refer to:* Humpback whale* Humpback dolphin* Humpback salmon* Humpback bridge* Humpback, a variant of hunchback...

 being more easily seen when bending forward.

A Gibbus deformity may result from the sail vertebrae associated with cretinism

Cretinism

Cretinism is a condition of severely stunted physical and mental growth due to untreated congenital deficiency of thyroid hormones usually due to maternal hypothyroidism.-Etymology and use of cretin:...

, the childhood form of hypothyroidism

Hypothyroidism

Hypothyroidism is a condition in which the thyroid gland does not make enough thyroid hormone.Iodine deficiency is the most common cause of hypothyroidism worldwide but it can be caused by other causes such as several conditions of the thyroid gland or, less commonly, the pituitary gland or...

.