Here is another case. This patient had a papule
on the knee that had been present for 7 months. This sinus tract in the dermis
is surrounded by palisaded granulomatous
inflammation and some neutrophils are present
within the tract. Close inspection of the granulomatous lining
revealed a residual embedded fragment of the thorn. No fungi were identified on H+E or PAS stains.
A granulomatous inflammatory reaction surrounds
this foreign body.
The black granular material on the surface
of one portion of the splinter is suspected
to be a fragment of paint.
No fungi were identified.
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As the biopsy specimen was removed, a thorn
came out of the specimen.
This final case is an implantation
of a different type.
This is an implantation of a hair.
The tract through the epidermis is visible.
Note the sharp, spear-like point
on one end of the hair fragment,
the ruffled cuticle along the edge
of the hair shaft and
the more lucent core of the shaft.
This is the kind of implantation
that may occur in barbers
in the interdigital webspace of the hand
producing a pilonidal sinus.
It may also occur in persons who groom animals.
Links to PubMed for references
Wood implantation and phaeomycotic cyst:
Wood implantation and phaeomycotic cyst:
Interdigital pilonidal sinus:
Interdigital pilonidal sinus:
Implantation dermatoses:
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