The light microscopic examination revealed squamous cell carcinoma (SCC) as acanthotic squamous epithelium with deep rete pegs
, epithelial and keratin pearls, pleomorphism, stromal infiltration and hyperchromatic nuclei (Fig.
Histopathology of skin lesion revealed focal acanthosis, hyperkeratosis and parakeratosis with Munro's microabscesses, hypogranulosis, suprapapillary thinning with focal elongation of rete pegs
with sparse perivascular lymphocytic infiltrate which was consistent with psoriasis vulgaris [Figure 3].
Histopathologic examination of terra firma- forme dermatosis displays epidermal atrophy with diminution of rete pegs
, prominent lamellar hyperkeratosis with focal areas of compact orthokeratosis in whorls.
Epithelium showed elephant like rete pegs
merging with ameloblastic follicles (Figure 3-5).
Where there is an increase in mechanical stress a stronger attachment is formed between the dermal papillae and rete pegs
(Dawber, R et al 2001).
Skin histopathology revealed markedly thinned out epidermis, exhibiting orthokeratosis and complete flattening of rete pegs
Histopathology showed large blood filled spaces separated by fibrous stroma with flattened rete pegs
of the overlying squamous epithelium, dilated and proliferating capillaries consistent with cavernous haemangioma (Fig.
The epidermis is attached to the dermis by deep, finger-like projections of epidermal tissue called rete ridges or rete pegs
Sometimes the melanocytes expand and fill the rete pegs
, bridging between them.
A biopsy was conducted from a hyperpigmented lesion over the shin, and histopathological examination revealed hyperkeratosis, acanthosis and irregular elongated thin branching rete ridges growing down into the dermis and increased melanin pigment in the lower part of the rete pegs
Tissue from buccal mucosa showed stratified squamous orthokeratinized epithelium with loss of rete pegs