Skin Appendage Tmour

       

http://www.histopathology-india.net/SAClass.htm

                             HISTOPATHOLOGY INDIA.COM

           Microcystic Adnexal Carcinoma

      Dr  Sampurna Roy  MD

 
Web www.histopathology-india.net
      DermPath-India

     Site created by

 Dr Sampurna Roy MD

          

http://www.histopathology-india.net/dermpath.htm

 
February 2007 

Benign sweat gland tumours

Cysts:

Hydrocystoma -Eccrine/Apocrine

Hamartomas:

Eccrine/Apocrine naevus

Eccrine Angiomatous Hamartoma

Porokeratotic eccrine ostial naevus

Benign Neoplasms:

Syringocystadenoma Papilliferum

Hidradenoma Papilliferum

Nipple Adenoma

Syringoma

Spiradenoma

Cylindroma

Chondroid Syringoma (benign mixed tumour)

Poroma

Hidradenoma

Apocrine adenoma

Papillary eccrine adenoma

Syringofibroadenoma

Malignant sweat gland tumour 

Low grade:

Microcystic adnexal carcinoma

Eccrine epithelioma

Adenoid cystic carcinoma

Mucinous carcinoma

Primary extramammary Paget’s disease

Intermediate grade:

Porocarcinoma

Digital papillary adenocarcinoma

High grade:

Hidradenocarcinoma

Apocrine adenocarcinoma

Eccrine ductal carcinoma

Spiradenocarcinoma

Malignant cylindroma

                 

A relatively common but poorly recognized adnexal lesion. The Winer dilated pore.Med Cutan Ibero Lat Am. 1989;17 (1):45-7.

Age: Elderly patients

Site: Head, neck and upper trunk.

Clinical presentation: Comedo-like structure

Microscopic features:  Image:

Lesion may extend to mid or lower dermis ; Funnel shaped structure lined by infundibular or isthmic-type epithelium, filled with laminated keratin, connected to the surface ;  Thickening of epithelium including finger-like projection into the dermis ; Epidermoid keratinization.

Differential diagnosis: Pilar sheath acanthoma

Abstract:

Dilated pore: a case report and an immunohistochemical study of cytokeratin expression.J Dermatol. 2003 Jul;30 (7) :556-8.

Trichoid basal cell carcinoma found in a dilated pore on the nose.Dermatol Surg. 2000 Sep;26(9):874-6.

 
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Sebaceous tumours ; Fordyce's Spots  ; Steatocystoma ; Nevus Sebaceous  ; Folliculosebaceous Cystic Hamartoma ;Sebaceous Hyperplasia ;Sebaceoma ; Sebaceous Adenoma; Sebaceous Carcinoma ;
Tumours of the Hair Follicle

Hair Germ Differentiation:

Trichoepithelioma  ; Desmoplastic Trichoepithelioma  ; Trichofolliculoma ;

Trichoblastoma ; Cutaneous lymphadenoma ;

                          
    
Infundibular differentiation:

Trichoadenoma ; Dilated Pore of Winer ; Pilar Sheath Acanthoma ;

Tumour of Follicular Infundibulum ;

Outer root sheath differentiation:
                    
Trichilemmoma ; Trichilemmal Carcinoma ; Proliferating Trichilemmal Cyst (Pilar Tumour) ;

Matrical differentiation:Pilomatrixoma and Pilomatrix Carcinoma .

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Myxoid Tumours of Soft Tissue

Classification of Soft Tissue Tumour

Gross examination of soft tissue specimen          

A practical approach to histopathological reporting of soft tissue tumours

Grading of soft tissue tumours

Lipomatous tumours

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Soft TissueTumours of Uncertain Differentiation               

Notochordal Tumour - Chordoma

Extra-adrenal Paraganglioma