Trunk Nodule

Nodules on the trunk include those on the chest,back and abdomen.

The common benign nodules on the trunk are epidermoid cysts,lipomas and benign neurofibromas and big dermal nevi or dermatofibromas.

The common malignant tumours are basal and squamous cell skin cancers,melanomas etc.See the list of Neoplastic lesions below.With most Nodular lesions you need a biopsy to sort out the malignancies from the infective and granulomatous causes.Remember to take some tissue for culture as well.The pathologist then earns his money doing a lot of special stains etc.

SIGN DIP MEN    Nodules Overview

 

S-Squamous   Many of the infective nodules below will have a rough surface 

 

I-Infective          Deep fungal infections particularly Chromoblastomycosis and Sporotrichosis,Tuberculosis,Atypical mycobacterial ,Leishmaniasis,Syphilis,Leprosy,Orf,Milker’s nodules,

 

G-Granulomatous    Sarcoidosis,Granuloma annulare,Foreign body,Erythema elevatum diutinum,Rheumatoid nodule,Granuloma faciale,Panniculitis,

 

N-Neoplastic    Benign Tumours such as sebaceous cysts,dermatofibroma,lipoma .More aggresive tumours such as  Basal cell carcinoma,Squamous cell carcinoma,Keratoacanthoma,Metastases,Merkel cell,Melanoma,Atypical fibroxanthoma,Mycosis fungoides,B cell lymphoma,Lymphocytoma,Angiolymphoid hyperplasia with eosinophilia,Angiosarcoma,Lymphangiosarcoma,Dermatofibrosarcoma protuberans,Cylindroma

 

D-Drugs    Iodides,Bromides,Phenytoin,Dapsone

 

I-Immunological   Erythema nodosum ,Sweet’s syndrome,Kimuras disease

 

P-Physical    Prurigo nodularis, Pyogenic granuloma,Digital myxoid cyst,Chilblains(Perniosis)

 

M-Metabolic   Xanthomas, Gouty tophi,Tumoral calcinosis,Mucinoses,Nodular amyloid

 

E-Endocrine    Pretibial myxedema,

 

N-Nutritional

 

Others    

Painful nodules   Multiple familial leiomyomas,Spiradenoma,Glomus tumour,Angiolipoma,Blue rubber bleb nevus ,Neuroma,Neurilemmoma,Keloid,Granular cell tumour,Dermatofibrosarcoma protuberans, Bleeding into a dermatofibroma

 

Nodules in a child   Calcinosis cutis,Focal dermal hypoplasia,Juvenile xanthogranuloma,Pilomatricoma,Solitary mastocytoma,Spitz nevus,