Immunohistochemical Study Protocol in Thyroid Pathology.

Immunohistochemical study proves valuable in the diagnosis of neoplastic pathology. Its application allows us to differentiate the origin of tumors, as seen with thyroglobulin and TTF1 in well-differentiated tumors of follicular origin and calcitonin or other neuroendocrine markers for tumors arising from C cells. At times, immunohistochemical study becomes necessary for the classification of thyroid carcinomas arising from follicular cells, although specific antibodies that would enable the exclusion of malignancy or differentiation between follicular carcinomas and papillary carcinomas have generally not been found; hence, various antibody panels are utilized.

Diagnostic Validation of Anti-TOX Antibody for Early-Stage Mycosis Fungoides Through Digital Analysis of Tissue Samples.

Mycosis fungoides (MF) has become one of the most difficult diagnostic challenges for both dermatologists and dermatopathologists because its clinical presentation and microscopic findings may mimic benign reactive processes, specifically those displaying histopathological features of interface dermatitis. The goal of our study was to prove with digital scanning and automated sample methodology through algorithmic analysis, combined with the utility of TOX marker a more precise, faster, and objective evaluation of each sample. Moreover, this would offer high levels of reproducibility with the possibility of establishing cut-off points, allowing us to distinguish between inflammatory dermatoses (ID) and MF.

Melanocytic Matricoma With Atypical Histopathological Features: A Case Report of an Extremely Rare Entity and Review of the Literature.

Melanocytic matricoma with atypical features is a rare, biphasic adnexal neoplasm displaying hair matrix differentiation, with only 3 reported cases worldwide. Generally, the lesion comprised a solid matrical and supramatrical cell proliferation, admixed with intermediate cell aggregates with sparse anucleated "shadow cells" and a prominent pigmented melanocytic hyperplasia. We report the case of a 78-year-old man with a slow-growing crusted lesion on the frontal left scalp, which in a matter of 1-2 months became a 0.