Answer : 3 all sarcoidosis

Chest CT scan of case 1 patient shows
typical pattern of pulmonary sarcoidosis with bronchovascular bundle thickening
and irregular nodular lesions

 Case2 - No invovement of sarcoidosis in other organs except spleen

         - Only spleen involvemen of sarcoidosis can happen.

  Case 3 - Initially on spleen was involved and splenectomy done, On F/U chest invovement of sarcoidosis was confrimed. 

Sarcoidosis in abdomen

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Frequently involved , although
usually asymptomatic(>95%)

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Liver and spleen ( 40-60%),
kidney ( 8-20%), pancreas, intestine, testis(<5%)

Liver and spleen involvement

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Alkaline phosphatase elevation

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Fever, malaise, weight loss

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Organomegaly with homogeneous
attenuation; most common finding.

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Focal nodules ( 5- 25%) R11;
Coalescing granulomas

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Innumerable, variable size,
diffuse distribution,

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CT : hypodense nodules

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MRI : Low SI on all sequences,

     Hypoenhance relative to
background liver

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US : hypo/hyperechoic nodules,
depend on echogenicity of liver or degree of fibrosis present in granuloma

Abdominal lymphadenopathy

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Moderate lymphadenopathy ( 30%)
: about 1cm or less

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Extensive lymphadenopathy (
10%) : > 2cm, and involvement of > 4 sites

Differential diagnosis

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Metastasis : uncommon simultaneous
involvement of both liver and spleen than sarcoidosis or lymphoma

-      
Lymphoma : more prominent and
frequent conglomerate of nodes

            Retrocrural involvement

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Tuberculosis : usually
association with miliary pulmonary involvement