DermPath-India

     Site created by

 Dr Sampurna Roy MD

          

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

                     HISTOPATHOLOGY INDIA.COM

           Desmoplastic/Spindle cell
/Neurotropic Melanoma

    Dr. Sampurna Roy  MD

 
 
   Gastrointestinal Stromal Tumour

        

http://www.histopathology-india.MelanocyticTumours.htm

July 2008
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E-book - History of  Medicine with special reference to India

Melanocytic tumours
              
1. Acquired Melanocytic Naevus

Ancient Naevus
Halo naevus
Balloon cell naevus
Combined Naevus
Recurrent melanocytic naevus

                   
2. Spindle and epithelioid cell naevi

Spitz naevus
Pigmented spindle cell naevus

3. Blue naevi

Common blue naevus 
Cellular blue naevus


4. Dermal melanocytoses

Naevus of Ota

Naevus of Ito  
Mongolian spot  

5. Congenital melanocytic naevi                                              
6. Dysplastic melanocytic naevi

Pathology of the Eyelid

Inflammatory diseases of the Eyelid

Tumour and tumour-like lesions of the Eyelid

Adnexal Tumours of the eyelid

Epidermal tumours of the Eyelid

Mesenchymal Tumours of the Eyelid

Melanocytic tumours of the Eyelid

Soft TissueTumours of Uncertain Differentiation               

Notochordal Tumour - Chordoma

Extra-adrenal Paraganglioma

        
Balloon cells are altered melanocytes with clear vacuolated cytoplasm caused by a defect in the process of melanogenesis.

The balloon cell naevus is characterized by large , vacuolated naevus  cells with clear cytoplasm and central nucleus. The nucleus appears hyperchromatic. Multinucleate balloon cells may be present.

The diagnosis should be made when more than 50% of the tumour shows balloon cell change. 

Although rare, balloon cell change has been observed in a variety of melanocytic proliferations, particularly intradermal melanocytic naevi and melanoma. Balloon cell change has also been reported in dysplastic naevus.

Distinction between balloon cell naevus and melanoma:  In melanoma cells are larger ; mitotic figures are present ; there is evidence of radial growth phase.

Visit: Balloon Cell Melanoma. Image Link(Dr Weem)

Balloon cell change may lead to difficulties in diagnosis, particularly with other clear cell neoplasms. Visit: Clear cell carcinoma of skin.

 Balloon cell naevus :Image Link(Dr Weem)

                    

 Further reading:

Unusual variants of malignant melanoma.Mod Pathol. 2006 Feb;19 Suppl 2:S41-70.

Proliferative nodules with balloon-cell change in a large congenital melanocytic nevus.J Cutan Pathol. 2006 Mar;33(3):253-5.

Balloon cell nevus of the soft palate: an immunohistochemical and ultrastructural study.Pathol Int. 2004 Nov;54(11):872-6.

Balloon cell nevus of the pharynx.Head Neck. 2004 Oct;26(10):910-4.

Conjunctival balloon cell nevi--light- and electronmicroscopic findings in 2 patients.Klin Monatsbl Augenheilkd. 2001 Apr;218(4):269-72.

Balloon cell change in cellular blue nevus.Am J Dermatopathol. 1999 Apr;21(2):181-4.

Coincidence of balloon cell melanoma with balloon cells in a dermal nevus.Pathologe. 1998 Feb;19(2):151-3.

Balloon-cell nevi and balloon-cell malignant melanoma.Arkh Patol. 1996 Jul-Aug;58(4):64-7.

 
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Pigmented melanocytic lesions causing diagnostic problems

Prognostic parameters of melanoma

Lentigo maligna melanoma

Superficial spreading melanoma

Nodular melanoma

Acral lentiginous melanoma

Desmoplastic /Spindle cell /
Neurotropic melanoma

Naevoid melanoma

Balloon cell melanoma

Epidermal tumours:

Epidermal Naevus ; Inflammatory linear verrucous epidermal nevus

Prurigo Nodularis

Acanthomas - [ Epidermolytic acanthoma;Acantholytic acanthoma; Melanoacanthoma]

Clear cell acanthoma

Large cell acanthoma

Warty Dyskeratoma

Seborrheic Keratosis

Verruca vulgaris;

Keratoacanthoma

Actinic Keratosis

Bowen's disease

Basal Cell Carcinoma

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Cutaneous Squamous Cell Carcinoma

Myxoid Tumours of Soft Tissue

Classification of Soft Tissue Tumour

Lipomatous tumours

Neural tumours

Vascular tumours

Myogenic tumours

Fibroblastic/ Myofibroblastic tumours

Myofibroblastic tumours

Fibrohistiocytic tumours

ChondroOsseous tumours