This great variability (there are over 200 different kinds of neurons) means that some neurons deviate from the standard basic morphology.
For example, some axons may form synapses directly with another neuron’s cell body, or even with its axon.
Neuronal cell bodies also vary widely both in size (small, medium, large, and giant) and in shape (star-shaped, fusiform, conical, polyhedral, spherical, pyramidal).
The geometry of a neuron’s dendrites and axon also vary tremdously
with its role in the neural circuit.
(click on 1. Anatomy of a Neuron)