Substantial heterogeneity was identified in p-AMPK stain, for instance, some neoplasms exhibited positive stain
in selected glands or cells and others showed identical stain in all glandular or cellular parts.
FeLV antigens were immunohistochemically detected in the hematopoietic cells of the bone marrow (Figure 1D, detail); however, positive stain
was not observed in tumoral cells.
Caption: Figure 5: Bladder tumor with CK20 positive stain
A diagnostic feature of rhabdomyosarcoma is a positive stain
for skeletal muscle differentiation.
The positive stain
for S-100 was also observed in 100% of the neurofibroma cases, which is a rate similar to that found in the literature.
The control group did not show any positive stain
for all MSC markers, while MSCs showed a positive stain
for all three markers at different time points.
As an evaluation of immune staining, a positive stain
was indicated by a brown colored precipitate in the following manner: 1) cells labeled by CAL displayed cytoplasmic and nuclear staining; and 2) cells labeled by CEA displayed a cytoplasmic staining pattern.
Cells showing a strong positive stain
to PAS and negative stain to AB were observed.
The close association between GCT and extraocular muscle might result from the multiply innervation of the muscle fibers.[sup] Almost all cases showed positive staining for both S-100 and CD68.[sup],, The positive stain
with CD68 can be explained by the intracytoplasmic accumulation of phagolysosomes and does not reflect a histiocytic origin.
Second, there was no clear definition of what was considered a positive stain
in the earlier studies (Table 1).
(18) Two separate studies performed on fluids in patients with ovarian serous carcinoma demonstrated that 94% (32 of 34) (19) and 69.6% (16 of 23) had positive stains
for PAX8, (20) respectively.