대한근골격영상의학회

Title : Case 460

Age / Sex : 34 / M Chief complaint : Dorsum mass of left foot, pain when running What is your impression? Two weeks later, you can see the final diagnosis with a brief discussion of this case. (Please submit only one answer) Courtesy : Sang Hoon Lee, Asan Medical Center Diagnosis: Os intermetatarseum Discussion Answer: Os intermetatarseum Findings: Bony mass between medial cuneiform and bases of first and second metatarsals Differential Diagnosis: Fracture Tumoral calcification Diagnosis: Os intermetatarseum Discussion: O less common accessory ossicle O between medial cuneiform and bases of first and second metatarsals O 3 basic types: free standing, articulating and fused O frequently asymptomatic O dorsal foot pain and/ or parasthesias in the first web space following local trauma & sports activities O related directly to compression of medial branch of deep peroneal nerve O association of hallux valgus deformity in fused form O physiological pes planus & loss of medial longitudinal arch of foot O decreasing anatomic tightness of local area References: Journal of clinical orthopaedics and trauma 3 (2012) 54-57.

Title : Case 460

Age / Sex : 34 / M

Chief complaint : Dorsum mass of left foot, pain when running

What is your impression?

Two weeks later, you can see the final diagnosis with a brief discussion of this case. (Please submit only one answer)

Courtesy : Sang Hoon Lee, Asan Medical Center

Diagnosis:

Os intermetatarseum

Answer:

Os
intermetatarseum

Findings:

Bony mass between
medial cuneiform and bases of first and second metatarsals

Differential Diagnosis:

Fracture

Tumoral
calcification

Diagnosis:

Os
intermetatarseum

Discussion:

O
less common
accessory ossicle

O
between medial
cuneiform and bases of first and second metatarsals

O
3 basic
types: free standing, articulating and fused

O
frequently
asymptomatic

O
dorsal foot
pain and/ or parasthesias in the first web space following local trauma &
sports activities

O
related
directly to compression of medial branch of deep peroneal nerve

O
association
of hallux valgus deformity in fused form

O
physiological
pes planus & loss of medial longitudinal arch of foot

O
decreasing
anatomic tightness of local area

References:

Journal of clinical orthopaedics and
trauma 3 (2012) 54-57.

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