HISTOPATHOLOGY INDIA.COM

           Microcystic Adnexal Carcinoma

      Dr  Sampurna Roy  MD

 
August 2009
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

Granulomatous Reaction Pattern of the Skin

Granuloma Annulare

Necrobiosis Lipoidica

Necrobiotic Xanthogranuloma   

Rheumatoid Nodule

Lupus Vulgaris

Cutaneous Sarcoidosis

Melkersson Rosenthal Syndrome

Annular Elastolytic Giant Cell Granuloma

Skin lesion in Crohn's Disease

Blastomycosis-like pyoderma

Foreign body granuloma

Rosacea

Interstitial Granulomatous Dermatitis

Interstitial Granulomatous Drug Reaction

Granulomatous T-cell lymphoma

Notochordal Tumour - Chordoma

Extra-adrenal Paraganglioma

                 

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.

             

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 .

                  

Pathopedia-India.com:

Contents ; Introduction of Pathology ; An outline of Diagnostic Techniques available in Pathology ; Cellular Injury ; Diagram showing Structural Changes in Reversible and Irreversible Cell Injury ; Autolysis; Heterolysis ; Necrosis; Coagulation (Coagulative) necrosis ; Caseative (Caseous) necrosis ; Liquefaction necrosis ; Fat necrosis ; Fibrinoid necrosis ; Apoptosis ; Gangrene ; Hyaline Change ; Atrophy ; Hypertrophy ; Hyperplasia ; Metaplasia ; Aplasia ; Hypoplasia ;Cellular Accumulations ; Accumulation of Glycogen, complex lipids and carbohydrates ; Pigments ; Melanin ; Pigments derived from Hemoproteins; Hemosiderin and Hemosiderosis ; Primary Hemochromatosis ; Hematin; Bilirubin; Lipofuscin; Mineral Dusts ; Silica ; Urate ; Amyloid ; Inflammation ; Inflammatory cells in acute and chronic inflammation ; Acute Inflammation; Types of Acute Inflammation; Chemical Mediators ; Chronic Inflammation; Wound Healing ; Circulatory Anatomy, Physiology and Regulation; Normal Fluid Balance; Edema; Morphology of Edema; Diagram showing Capillary System and Mechanisms of Edema Formation; Hyperemia and Congestion; Hemostasis and Thrombosis; Embolism; Fat Embolism; Air Embolism ; Decompression Sickness ; Amniotic Fluid Embolism ; Diagram showing Sources of Arterial Emboli ; Diagram showing Sources of Venous Emboli ; Infarction ; Diagram showing common sites of Systemic Infarction  from Arterial Emboli; Shock; Pathology of Shock; Diagram showing Complications of Shock; Hemorrhage;

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