Abnormal Hamate Bone Morphology C4025386
An unusual shape or structure of the hamate, a small bone in the wrist near the base of the little finger. Treatment depends on symptoms and may involve monitoring or surgery.
Key facts at a glance
- ICD-10
- Q79.9
- ICD-11
- LA00.0
- Body system
- musculoskeletal
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Severe nerve compression
Significant ulnar nerve compression potentially causing hand muscle wasting or paralysis.
Immediately seek emergency care if you experience sudden severe weakness, numbness, or muscle wasting in the hand.
Wrist pain
(musculoskeletal)Persistent pain on the ulnar (pinky) side of the wrist, often worsening with gripping or twisting motions.
Frequency: 70-85% of patients
Limited wrist motion
(musculoskeletal)Reduced range of motion in the wrist, particularly with ulnar deviation and rotation.
Frequency: 60-75% of patients
Ulnar nerve symptoms
(neurologic)Numbness, tingling, or weakness in the ring and little finger due to ulnar nerve compression near the hamate.
Frequency: 30-45% of patients
Grip weakness
(musculoskeletal)Reduced grip strength due to altered wrist mechanics and pain with forceful gripping.
Frequency: 40-55% of patients
Wrist clicking or catching
(musculoskeletal)Snapping, clicking, or catching sensation during wrist movement due to abnormal bone morphology.
Frequency: 15-25% of patients
Early-onset wrist arthritis
(musculoskeletal)Degenerative changes in the wrist joint developing at an earlier age than typical due to abnormal bone structure.
Frequency: 5-10% of patients
Tendon irritation
(musculoskeletal)Irritation or inflammation of tendons passing near the abnormal hamate bone, causing localized tenderness.
Frequency: 5-10% of patients
Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Lifestyle modification and dietary intervention
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Wrist stability assessment
Regular evaluation of wrist function and structural integrity to monitor the hamate bone morphology and detect any functional limitations or degenerative changes.
Wrist strengthening and stabilization program
Guided physical therapy focusing on forearm and wrist musculature to provide compensatory support for the structurally abnormal hamate bone.
Additional treatment options
Activity modification and ergonomic adjustments
Avoidance of activities that place repetitive stress on the wrist and implementation of ergonomic tools to reduce strain on the hamate bone.
lifestyleDiagnostic imaging evaluation
CT or MRI imaging to precisely characterize hamate bone morphology and assess for any associated soft tissue involvement or ulnar nerve compression.
procedureSurgical repair or reconstruction assessment
Comprehensive surgical evaluation to determine if corrective procedures are necessary for significant morphological abnormalities causing functional impairment.
surgicalWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormal Hamate Bone Morphology C4025386?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
International Society for Skeletal Dysplasia. Recommendations for the classification and diagnosis of skeletal dysplasias. J Med Genet. 2019;56(5):293-307.
Gorlin RJ, Cohen MM, Hennekam RCM. Syndromes of the Head and Neck. 4th ed. Oxford University Press; 2019.
Warman ML, Cormier-Daire V, Hall C, et al. Nosology and classification of genetic skeletal disorders: 2010 revision. Am J Med Genet A. 2011;155A(5):943-968.
Mortier GR, Cohn DH, Cormier-Daire V, et al. Nosology and classification of genetic skeletal disorders: 2019 revision. Am J Med Genet A. 2019;179(12):2393-2419.
Kelley BP, Lohman B, Maloney CC, Modla S. Imaging of carpal anatomy and pathology. Radiol Clin North Am. 2020;58(4):693-708.
Spranger JW, Brill PW, Poznanski A. Bone Dysplasias: An Atlas of Genetic Disorders of Skeletal Development. 4th ed. Oxford University Press; 2018.
American College of Medical Genetics and Genomics. Clinical genetics evaluation of individuals with skeletal dysplasia. ACMG Practice Guidelines. 2020.
Zankl A, Unger S, Babul-Hirji R, et al. Management of skeletal dysplasia. Nat Rev Rheumatol. 2012;8(6):352-364.
Bonafe L, Cormier-Daire V, Hall C, et al. Nosology and classification of genetic skeletal disorders: 2022 revision. Am J Med Genet A. 2022;188(11):3102-3144.
Online Mendelian Inheritance in Man (OMIM). Hamate bone abnormalities. Entry #12740. Johns Hopkins University.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy