Answer

Alopecia areata.

[This shows a characteristic, peribulbar lymphocytic infiltrate. 
 The proverbial "swarm of bees".]

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Note that these are most easily found in the horizontal sections
because there are many more follicles visible in the plane of
section.
Note that in the vertical sections, there are many follicles in
catagen and there are melanophages in portions of the collapased
fibrous root sheath of one follicle as a result of prior
peribulbar inflammation.