The defining symptom of Kallmann syndrome is a lack of sense of smell (anosmia) or a reduced sense of smell.

The condition can also occur with a normal sense of smell when the condition is called hypogonadotropic hypogonadism (HH).

There are other additional symptoms that may or may not occur. Kallmann syndrome or HH show a range of symptoms and patients may not experience any of them or only one them.

Possible additional symptoms:

• Hearing loss

• Cleft lip / palate

• Fused fingers / toes

• Missing teeth

• Curvature of the back (scoliosis)

• Mirror movements of the hands

• Missing kidney