Vegetable and plant inspired signs

There are many signs in radiology which are vegetable- and plant-inspired, they include:

Unprocessed produce

• bamboo spine 
• celery stalk (disambiguation):
  • celery stalk sign anterior cruciate ligament
  • celery stalk metaphysis
• Christmas tree intestinal atresia
• coconut left atrium
• coffee bean sign
• cotton wool appearance of bone of Paget disease
• drooping lily sign
• ginkgo leaf sign (disambiguation)
  • ginkgo leaf sign (spinal meningioma)
  • ginkgo leaf sign (subcutaneous emphysema)
• holly leaf sign
• miliary opacities: a long list, but TB is the classical example
• mushroom cap sign in rectosigmoid endometriosis
• onion signs (disambiguation)
  • onion bulb nerves: Charcot-Marie-Tooth type 1A and chronic inflammatory demyelinating polyneuropathies (CIDP)
  • onion peel sign: pulmonary hydatid cyst
  • onion skin periosteal reaction: acute osteomyelitis and Ewing sarcoma
• popcorn calcification: typical of chondroid lesions - popping does not count as a process
• rice bodies
• rice grain calcification: cysticercosis
• tree-in-bud: on CT, non-specific pulmonary pattern
• water lily sign: of hydatid cyst

Processed vegetarian foods and condiments

• chocolate cyst of both cholesterol granuloma and endometriosis variety
• cottage loaf sign: herniated liver through a right-sided diaphragmatic rupture
• doughnut sign (disambiguation)
  • crescent in a doughnut sign (bowel)
  • doughnut sign (bone scan)
  • doughnut sign (bowel)
  • doughnut sign (chest)
  • doughnut sign (orbit)
• hot cross bun sign
• linguine sign: MRI of ruptured breast implant
• omental cake: infiltration of greater omentum by metastatic implants
• pancake organ (disambiguation)
  • pancake adrenal 
  • pancake brain
  • pancake kidney
  • pancake vertebra: commonly eosinophilic granuloma
• salt and pepper sign (disambiguation)
  • salt and pepper noise (MRI artifact)
  • salt and pepper sign (ARPCKD)
  • salt and pepper sign (paraganglioma)
  • salt and pepper sign (Sjögren syndrome)
  • salt and pepper sign (vertebral hemangioma)
  • salt and pepper skull (hyperparathyroidism)