Which of the following melanomas do not have an in situ growth phase?
Nodular melanomas are the only type in which the malignant melanoma cells appear to have the capacity for invasive growth into the dermis and beyond from the beginning, without an in situ phase, and these tumours develop rapidly and is difficult to diagnose at an early stage. Ref: Rook's textbook of dermatology, 8th edition, Pg 54.36.
Superficial spreading melanoma
Nodular melanomas
Lentigo maligna melanoma
Desmoplastic melanoma