New York - The sudden apparition of Vincent van Gogh's Docteur Gachet in Pablo Picasso's 1901 depiction of The Blue Room has got the art world stumped.
The oil on canvas painting shows a shapely naked blonde washing herself in a large blue basin, her pubes exactly matching the golden tresses piled up high upon her head.
This morning curators at the Guggenheim where the Picasso hangs were astonished to notice that a strange male figure had suddenly appeared hexoplasm-like among the folds of bed linen in the painting's background.
By lunchtime the apparition had gained depth and definition prompting the gallery's senior Impressionism curator to dial 911 and ask for Ghostbusters.
Tonight there is little doubt among the congoscenti (WTF dat? Ed) that the sudden unexplained appearance is in fact a very voyeurish Docteur Gachet, painted by Dutch master van Gogh in June 1890 at Auvers-sur-Oise.
In the original portrait van Gogh's personal physician Dr Gachet is seen sitting at a table, leaning his head on his right arm while smoking a spliff.
The Dutchman painted the Gachet portrait during his convalescence from a stay at a lunatic asylum where he'd been sectioned after coming down with psychosis from drinking too much Absinthe with his old mucker Camille Pissarro, a friend of Gachet's.
Commenting on the spooky apparition one of the Guggenheim conservators said this evening, "We have long suspected something lurking under the surface of The Blue Room, something about the breast strokes - uh, brushstrokes! - on the nude did it for me."