Diabetes insipidus Diabetes, gestational (See: Gestational diabetes) Diabetes, hypoglycemia (See: Hypoglycemia) Diabetes, type 1 (See: Type 1 diabetes) Diabetes, type 1 in children (See: Type 1 diabetes

Diabetes Overview Diabetes mellitus refers to a group of diseases that affect how your body uses blood sugar (glucose). Glucose is vital to your health because it’s an important source of energy

Deviated septum DFSP (See: Dermatofibrosarcoma protuberans) Overview A deviated septum occurs when the thin wall (nasal septum) between your nasal passages is displaced to one side. In many people, the

Desmoplastic small round cell tumors Detached retina (See: Retinal detachment) Developmental dysplasia of the hip (See: Hip dysplasia) Overview Desmoplastic (des-moe-PLAS-tik) small round cell tumors are

Desmoid tumors Overview Desmoid tumors are noncancerous growths that occur in the connective tissue. Desmoid tumors most often occur in the abdomen, arms and legs. Another term for desmoid tumors is aggressive

Dermatomyositis Dermatophytosis (See: Athlete’s foot) Overview Dermatomyositis (dur-muh-toe-my-uh-SY-tis) is an uncommon inflammatory disease marked by muscle weakness and a distinctive skin rash. The

Dermatographia Overview Dermatographia is a condition also known as skin writing. When people who have dermatographia lightly scratch their skin, the scratches redden into a raised wheal similar to hives.

Nonmelanoma skin cancer Dermatofibrosarcoma protuberans (DFSP) is a very rare type of skin cancer that begins in connective tissue cells in the middle layer of your skin (dermis). Dermatofibrosarcoma protuberans

Dermatitis Dermatitis, atopic (eczema) (See: Atopic dermatitis (eczema)) Dermatitis, cercarial (See: Swimmer’s itch) Dermatitis, contact (See: Contact dermatitis) Dermatitis, scratch (See: Neurodermatitis) Dermatitis,

Depression (major depressive disorder) Depression, in teenagers (See: Teen depression) Depression, postpartum (See: Postpartum depression) Overview Depression is a mood disorder that causes a persistent

Depersonalization-derealization disorder Depression (major depression) (See: Depression (major depressive disorder)) Overview Depersonalization-derealization disorder occurs when you persistently or repeatedly

Dengue fever Dengue hemorrhagic fever (See: Dengue fever) Dependence, nicotine (See: Nicotine dependence) Dependent personality disorder (See: Personality disorders) Depersonalization disorder (See: Dissociative

Dementia Dementia, Alzheimer’s disease (See: Alzheimer’s disease) Dementia, frontotemporal (See: Frontotemporal dementia) Dementia, Lewy body (See: Lewy body dementia) Dementia, vascular (See:

Delirium Overview Delirium is a serious disturbance in mental abilities that results in confused thinking and reduced awareness of the environment. The start of delirium is usually rapid — within hours

Delayed sleep phase Overview Delayed sleep phase — officially known as delayed sleep-wake phase sleep disorder — is an internal sleep clock (circadian rhythm) sleep disorder in which your sleep pattern