Cysts epidermoid

Burrig, K.F. Epithelial (true) splenic cysts. Pathogenesis of the meso-thelial and so-called epidermoid cyst of the spleen. Amer. J. Surg. Pathol. 1988 12 275-281... 

Multiple, large epidermoid cysts have been described in a 23-year-old man taking ciclosporin (154). 

Gupta S, Radotra BD, Kumar B, Pandhi R, Rai R. Multiple, large, polypoid infundibular (epidermoid) cysts in a cyclosporin-treated renal transplant recipient. Dermatology 2000 201(1) 78. 

Limat A, Breitkreutz D, Hunziker T, Klein CE, Nozer F, Fusenig NE Braathen LR (1994) Outer root sheath (ORS) cells organize into epidermoid cyst-like spheroids when cultured inside Matrigel a light-microscope and immunohistological comparison between human ORS cells and interfoUicular keratinocytes. Cell and Tissue Research 275 169-176. 

Cheng L, Zhang S, MacLennan GT, et al. Interphase fluorescence in situ hybridization analysis of chromosome 12p abnormalities is useful for distinguishing epidermoid cysts of the testis from pure mature teratoma. Clin Cancer Res. 2006 12 5668. 

Dermoid cyst Epidermoid cyst features plus adnexa of skin cyst contains sebum, squames, and hair Keratin (-r) Midline cerebellum fourth ventricle skull spinal dura cauda equina... 

Epidermoid cyst Fibrous wall lined by inner keratinizing stratified squamous epithelium cyst contains waxy squames Keratin (-r) CP angle temporal lobe spinal dura pineal sella brainstem CNS... 

Epidermoid cysts are more common in lateral than midline sites, but they have been found in many different locations (see Table 20.13). Common locations are the cerebellopontine angle, around the pons, near the sella, within the temporal lobe, in the diploe, and in the spinal canal. Carcinoma rarely arises within an epidermoid cyst. ... 

Clinically, epidermoid cysts appear as firm, oval or lobulated nodules of variable size located either on the dorsum of the penis or, less frequently, on the ventral aspect of the penile shaft (Rattan et al. 1997). They are more often encountered in childhood, but can occur also in middle age and in the elderly. 

These lesions are usually slowly growing and asymptomatic, but occasionally can grow rapidly and get inflamed. Large epidermoid cysts may interfere with intercourse and cause problems with walking or wearing underwear. They can also interfere with urination. 

Therapy consists of surgical removal of the mass. Imaging is often required in patients with large, rapidly growing epidermoid cysts to confirm the cystic nature of the lesion and assess the relationship with adjacent organs. 

At ultrasound (Fig. 20.1) epidermoid cysts appear as ovoid or lobulated masses with well-defined margins, with relatively echogenic content with hy-poechoic foci. Calcifications are occasionally identi-... 

These lesions are extremely rare in the penis with only few cases reported in the literature (Aidarov and Zolotarev 1962 Tomasini et al. 1997). In contrast to epidermoid cysts, dermoid cysts are lined by an epidermis that possesses various fully mature epi-... 

Malherbe A, Chemantais J (1880) Note sur I pith lioma calci-fie des glandes sebac es. Prog Med 8 826-837 Maxwell AJ, Mamtora H (1990) Sonographic appearance of epidermoid cyst of the testis. J Clin Ultrasound 18 188-190... 

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