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Parathyroid Adenoma (External View)
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Parathyroid Adenoma (External View)

External view of a parathyroid adenoma.
Smooth surface is typical of a benign neoplasm.
Cannot separate hyperplasia from adenoma on the basis of gross findings in one gland.
Parathyroid carcinoma would probably show adhesions reflecting difficulty in dissecting it from adjacent invaded structures.
(Description By:Melinda Sanders, M.D. )
(Image Contrib. by: UCHC )
Parathyroid Adenoma
Etiology

unknown
Pathogenesis

unknown
secretes unregulated parathormone resulting in elevation of serum calcium by renal retention, GI absorption and bone mobilization,
Epidemiology

25/100,000 in US
3:1 female predominance
age > 50
General Gross Description

Single
Red-tan
Occasionally can see compressed rim of normal parathyroid
General Microscopic Description

Composed of any cell types within parathyroid
No stromal or intracellular fat
May see compressed rim of normal parathyroid
Nuclear atypia and mitoses are NOT indicative of malignancy
Clinical Correlation

usually detected in asymptomatic patient
rarely see evidence of osteitis fibrosa cystica (due to osteoclast activity and bone resorption) and renal stones
References

Cotran RS, Kumar V, Robbins SL: Robbins Pathologic Basis of Disease. 5th ed. Philadelphia, W.B. Saunders, 1994, pp. 1144-146
Parathyroid Adenoma
Synopsis by: Melinda Sanders m.D. (T97000M81400)[148]
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