Tufted Angioma
Acquired Tufted Angioma at Scanning MagnificationScanning magnification of acquired tufted angioma (ATA) shows scattered lobular collections of vessels in the superficial and deep dermis. The lobules bulge into dilated vessels,…
Sclerotic Fibroma
Typically does not show prominent storiforming of collagen, although it may be focally present in rare cases • Pleomorphic fibroma Pleomorphic cells are more prominent, and storiforming pattern of collagen should…
Acral Fibrokeratoma
More cellular than acral fibrokeratoma Fascicles of spindled cells Lacks vertically oriented collagen bundles CD34(+) • Superficial acral fibromyxoma More cellular lesion Loose storiform to fascicular growth pattern Lacks vertically oriented…
Pilar Sheath Acanthoma
Pilar Sheath AcanthomaScanning magnification of a pilar sheath acanthoma shows a dilated follicular structure lined by a thickened squamous epithelium with endophytic, lobulated areas . Pilar Sheath Acanthoma at Higher…
Superficial Acral Fibromyxoma
Particularly in or near nail bed • Solitary, slowly growing, and often long-standing lesion • Treatment: Complete excision • Excellent prognosis • Low rate of recurrence, usually related to incomplete excision Macroscopic • Usually <…
Angiolymphoid Hyperplasia With Eosinophilia
Endothelial cells may have cytoplasmic vacuolization May have solid appearance • Many eosinophils, lymphocytes, and mast cells, although eosinophil number can vary greatly Top Differential Diagnoses • Papillary endothelial hyperplasia • Kimura disease…
Staging for Specimens of Squamous Cell Carcinoma of Skin
pN2a: Metastasis in single ipsilateral lymph node, > 3 cm to < 6 cm in greatest dimension pN2b: Metastasis in multiple ipsilateral lymph nodes, none > 6 cm in greatest…
Progressive Lymphangioma
Presents in infants or young children as multiple small vesicular lesions • Lymphangiomatosis Diffuse involvement of multiple organ systems, including skin, soft tissues, bone, and internal organs • Atypical vascular lesion (radiotherapy-related)…
Spindle Cell Hemangioma
Spindle Cell HemangiomaLow magnification shows a noncircumscribed lesion in the dermis and subcutis composed of an admixture of thin-walled dilated blood vessels and sheets of spindle cells. Spindle Cell Hemangioma…
Glomeruloid Hemangioma
Glomeruloid Hemangioma at Scanning MagnificationScanning magnification view of a glomeruloid hemangioma shows small clusters of vessels in the mid to deep dermis . Glomeruloid Hemangioma at Higher MagnificationHigher magnification shows…
