Home > E. Pathology by systems > Skin > poroma
poroma
Thursday 17 March 2016
poromas ; poroid tumors
| WP | PO |
Images
Dermal duct tumor, in the family of poroid tumors. bland, poroid cells. no connection to epiderm (in THIS plane).
poroma
Synopsis
cords and nests of small keratinocytes attached to the epidermis
nests are sharply delimited from adjacent epidermis
ducts and sharply delimited islands of squamous epithelium
intraepidermal (“hidroacanthoma simplex”), intradermal (“dermal duct tumor”) or mixed (most common)
dermis with reactive vessels and inflammatory infiltrate
possible heavily pigmented variants
granulation-like tissue in the stroma
Types
classic eccrine poroma (trabecular eccrine poroma )
hidroacanthoma simplex (intraepithelial poroma )
dermal duct tumor (intradermal poroma )
syringoacanthoma
syringofibroadenoma
poroid hidradenoma
Differential diagnosis
acrosyringeal adenomatosis
basal cell carcinoma
seborrheic keratosis
See also
- cutaneous adnexal tumors
- cutaneous eccrine tumors
| WKP | PO |
Images
acrosyringium; eccrine poroma
- https://twitter.com/JMGardnerMD/status/791701455275233280
- https://twitter.com/MarcelaSaebL/status/724961740299988994
Poroma with sebaceous differentiation : apocrine poroma ?
- https://twitter.com/JRamirezMD/status/807207902641553408
- https://twitter.com/BenjaminAwood/status/841493380613922816
Synopsis
intradermal tumors / dermal tumors
dermal micronodules
dermal nests of bland basaloid cells
cords and nests of small keratinocytes / basaloid cells attached to the epidermis
dermal nests are sharply delimited from adjacent epidermis
associated ducts
sharply delimited islands of squamous epithelium
dermis has reactive vessels and inflammatory infiltrate
possible heavily pigmented variants
DIfferential diagnosis
acrosyringeal adenomatosis
basal cell carcinoma (BCC)
seborrheic keratosis
See also
porocarcinoma
cutaneous tumors
- cutaneous adnexal tumors
- eccrine tumors
porocarcinoma
Digital slides