Alpha-mannosidosis occurs when the enzyme Alpha- D- mannosidase functions minimally than is required. The three subcategories include Type 1- a lenient form which is detected around or after ten years of age resulting in myopathy, skeletal deformities and decelerated development. Type 2- a mild form with fairly same symptoms which occurs before the age of ten Type 3- a more serious disorder consequent of a prenatal loss or premature death, due to the gradual involvement of the central nervous system. This disorder is characterized by a widespread impairment of the brain, with consequent energetic and slow mental developments, A main feature of this ailment is similar infections occurring repeatedly.

The indicators of the disease vary greatly in occurrence and severity. An afflicted individual displays the following characteristics: • Intellectual incapability • Prominent facial features • Osteopenia or minimized bone density • Calvaria or the thickening of the topmost skull bones • Deformation of the vertebra or the spinal bones • Knock knees or bowed legs • Degeneration of the bones and joints Trademark facial features of the affected patients: • Overgrown head • Distinctive forehead • Receding hairline • Circular eyebrows • Big ears • Flattened bridge of the nose • Teeth that are widely spaced • Overdeveloped gums • Large tongue Difficulties faced by the affected patients: • Ataxia or having problems in systematic movements • Myopathy or weakening of the muscles • Delayed motor skills in sitting up straight or talking • Speech deficiencies • Enhanced risk of infections • The liver and spleen enlargement (hepatosplenomegaly) • Accumulation of brain fluid (hydrocephalus) • Deafness • Cataract • Mental issues such as anxiety, depression or hallucinations Immune Deficiency A principal characteristic of the disease is recurring infections including mostly in the middle ear, upper and lower respiratory tract and gastrointestinal tract. Skeletal Problems The skeletal deformity occurs mostly in the spinal area of the chest which cause a malformed and inflexible spine, along with acute back aches. Joint degeneration is another lesser- known symptom of the ailment.

Alpha-Mannosidosis is caused by deficient activity of the enzyme alpha-D-mannosidase.

Assessment of the disease and the treatment procedures are acknowledged based on prominent triggers, a thorough medical history of the patient and detailed health check -up. Then final verification of the disease is done through enzyme assays that demonstrate lessening activity of the alpha-D-mannosidase and molecular genetic testing.

Bone marrow or transplant of the stem cell is a treatment many children have benefitted from. A permanent funding for the research work is being conducted by the ISMRD for the long- lasting impact of bone marrow transplant for Alpha-Mannosidosis. The enzyme replacement therapy is moderately approved in Europe ( 2018) and America ( 2023). The procedure is to substitute the missing enzyme for breaking down of the built- up materials.