Free Medical Coding

ICD10CM, HCPCS, PCS, DRG codes lookup for free! Coding news and articles and more!

Free Medical Coding > ICD10 CM > 2025 ICD-10-CM Diagnosis Codes Index > 2025 ICD-10-CM Index Term Starting With ‘M’

2025 ICD-10-CM Index Term Starting With ‘M’

  • Macacus ear, Q17.3
  • Maceration, wet feet, tropical (syndrome), T69.02-
  • MacLeod\’s syndrome, J43.0
  • Macrocephalia, macrocephaly, Q75.3
  • Macrocheilia, macrochilia (congenital), Q18.6
  • Macrocolon, Q43.1
  • Macrocornea, Q15.8
  • Macrocytic
  • Macrocytosis, D75.89
  • Macrodactylia, macrodactylism (fingers) (thumbs), Q74.0
  • Macrodontia, K00.2
  • Macrogenia, M26.05
  • Macrogenitosomia (adrenal) (male) (praecox), E25.9
  • Macroglobulinemia (idiopathic) (primary), C88.0
  • Macroglossia (congenital), Q38.2
  • Macrognathia, macrognathism (congenital) (mandibular) (maxillary), M26.09
  • Macrogyria (congenital), Q04.8
  • Macrohydrocephalus
  • Macromastia
  • Macrophthalmos, Q11.3
  • Macropsia, H53.15
  • Macrosigmoid, K59.39
  • Macrospondylitis , acromegalic, E22.0
  • Macrostomia (congenital), Q18.4
  • Macrotia (external ear) (congenital), Q17.1
  • Macula
  • Maculae ceruleae –, B85.1
  • Maculopathy, toxic
  • Madarosis (eyelid), H02.729
  • Madelung\’s
  • Madness
  • Madura
  • Maduromycosis, B47.0
  • Maffucci\’s syndrome, Q78.4
  • Magnesium metabolism disorder
  • Main en griffe (acquired)
  • Maintenance (encounter for)
  • Majocchi\’s
  • Major
  • Mal de los pintos
  • Mal de mer, T75.3
  • Malabar itch (any site), B35.5
  • Malabsorption, K90.9
  • Malacia, bone (adult), M83.9
  • Malacoplakia
  • Malacosteon, juvenile
  • Maladaptation
  • Maladie de Roger, Q21.0
  • Maladjustment
  • Malaise, R53.81
  • Malakoplakia
  • Malaria, malarial (fever), B54
  • Malassez\’s disease (cystic), N50.89
  • Malassimilation, K90.9
  • Maldescent, testis, Q53.9
  • Maldevelopment
  • Male type pelvis, Q74.2
  • Malformation (congenital)
  • Malfunction
  • Malherbe\’s tumor
  • Malibu disease, L98.8
  • Malignancy
  • Malignant
  • Malingerer, malingering, Z76.5
  • Mallet finger (acquired)
  • Malleus, A24.0
  • Mallory-Weiss syndrome, K22.6
  • Mallory\’s bodies, R89.7
  • Malnutrition, E46
  • Malocclusion (teeth), M26.4
  • Malposition
  • Malposture, R29.3
  • Malrotation
  • Malta fever
  • Maltreatment
  • Maltworker\’s lung, J67.4
  • Malunion, fracture
  • Mammillitis, N61.0
  • Mammitis
  • Mammogram (examination), Z12.39
  • Mammoplasia, N62
  • Management (of)
  • Mangled
  • Mania (monopolar)
  • Manic depression, F31.9
  • Manic-depressive insanity, psychosis, or syndrome
  • Mannosidosis, E77.1
  • Mansonelliasis, mansonellosis, B74.4
  • Manson\’s
  • Manual
  • Maple-bark-stripper\’s lung (disease), J67.6
  • Maple-syrup-urine disease, E71.0
  • Marable\’s syndrome (celiac artery compression), I77.4
  • Marasmus, E41
  • Marble
  • Marburg virus disease, A98.3
  • March
  • Marchesani syndrome (-Weill), Q87.0
  • Marchiafava syndrome or disease (-Bignami), G37.1
  • Marchiafava-Micheli syndrome, D59.5
  • Marcus Gunn\’s syndrome, Q07.8
  • Marfan\’s syndrome
  • Marie-Bamberger disease
  • Marie-Charcot-Tooth neuropathic muscular atrophy, G60.0
  • Marie-Strümpell arthritis, disease or spondylitis
  • Marie\’s
  • Marion\’s disease (bladder neck obstruction), N32.0
  • Marital conflict, Z63.0
  • Mark
  • Marker heterochromatin
  • Maroteaux-Lamy syndrome (mild) (severe), E76.29
  • Marrow (bone)
  • Marseilles fever, A77.1
  • Marsh fever
  • Marshall\’s ectodermal dysplasia (hidrotic), Q82.4
  • Marsh\’s disease (exophthalmic goiter), E05.00
  • Masculinization with adrenal hyperplasia (female), E25.9
  • Masculinovoblastoma, D27.-
  • Masochism (sexual), F65.51
  • Mason\’s lung, J62.8
  • Mass
  • Massive
  • Mast cell
  • Mastalgia, N64.4
  • Masters-Allen syndrome, N83.8
  • Mastitis (acute) (diffuse) (nonpuerperal) (subacute), N61.0
  • Mastocytoma (extracutaneous), D47.09
  • Mastocytosis, D47.09
  • Mastodynia, N64.4
  • Mastoid
  • Mastoidalgia
  • Mastoiditis (coalescent) (hemorrhagic) (suppurative), H70.9-
  • Mastopathy, mastopathia, N64.9
  • Mastoplasia, mastoplastia, N62
  • Masturbation (excessive), F98.8
  • Maternal care (for)
  • Matheiu\’s disease (leptospiral jaundice), A27.0
  • Mauclaire\’s disease or osteochondrosis
  • Maxcy\’s disease, A75.2
  • Maxilla, maxillary
  • May anomaly or syndrome (-Hegglin), D72.0
  • Ménétrier\’s disease or syndrome, K29.60
  • Ménière\’s disease, syndrome or vertigo, H81.0-
  • Mönckeberg\’s arteriosclerosis, disease, or sclerosis
  • Müllerian mixed tumor
  • Münchhausen\’s syndrome
  • Münchmeyer\’s syndrome
  • McArdle (-Schmid)(-Pearson) disease (glycogen storage), E74.04
  • McCune-Albright syndrome, Q78.1
  • McQuarrie\’s syndrome (idiopathic familial hypoglycemia), E16.2
  • ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome), G93.32
  • Meadow\’s syndrome, Q86.1
  • Measles (black) (hemorrhagic) (suppressed), B05.9
  • Meat-wrappers\’ asthma, J68.9
  • Meatitis, urethral
  • Meatus, meatal
  • Meckel-Gruber syndrome, Q61.9
  • Meckel\’s diverticulitis, diverticulum (displaced) (hypertrophic), Q43.0
  • Meconium
  • Median
  • Mediastinal shift, R93.89
  • Mediastinitis (acute) (chronic), J98.51
  • Mediastinopericarditis
  • Mediastinum, mediastinal
  • Medicine poisoning
  • Mediterranean
  • Medulla
  • Medullary cystic kidney, Q61.5
  • Medullated fibers
  • Medulloblastoma
  • Medulloepithelioma
  • Medullomyoblastoma
  • Meekeren-Ehlers-Danlos syndrome, Q79.69
  • Megacolon (acquired) (functional) (not Hirschsprung\’s disease) (in), K59.39
  • Megaesophagus (functional), K22.0
  • Megalencephaly, Q04.5
  • Megalerythema (epidemic), B08.3
  • Megaloappendix, Q43.8
  • Megalocephalus, megalocephaly NEC, Q75.3
  • Megalocornea, Q15.8
  • Megalocytic anemia, D53.1
  • Megalodactylia (fingers) (thumbs) (congenital), Q74.0
  • Megaloduodenum, Q43.8
  • Megaloesophagus (functional), K22.0
  • Megalogastria (acquired), K31.89
  • Megalophthalmos, Q11.3
  • Megalopsia, H53.15
  • Megalosplenia
  • Megaloureter, N28.82
  • Megarectum, K62.89
  • Megasigmoid, K59.39
  • Megaureter, N28.82
  • Megavitamin-B6 syndrome, E67.2
  • Megrim
  • Meibomian
  • Meibomitis
  • Meige-Milroy disease (chronic hereditary edema), Q82.0
  • Meige\’s syndrome, Q82.0
  • Melalgia, nutritional, E53.8
  • Melancholia, F32.A
  • Melanemia, R79.89
  • Melanoameloblastoma
  • Melanoblastoma
  • Melanocarcinoma
  • Melanocytoma, eyeball, D31.9-
  • Melanocytosis, neurocutaneous, Q82.8
  • Melanoderma, melanodermia, L81.4
  • Melanodontia, infantile, K03.89
  • Melanodontoclasia, K03.89
  • Melanoepithelioma
  • Melanoma (malignant), C43.9
  • Melanosarcoma
  • Melanosis, L81.4
  • Melanuria, R82.998
  • MELAS syndrome, E88.41
  • Melasma, L81.1
  • Melena, K92.1
  • Meleney\’s
  • Melioidosis, A24.9
  • Melitensis, febris, A23.0
  • Melkersson syndrome (-Rosenthal), G51.2
  • Mellitus, diabetes
  • Melorheostosis (bone)
  • Meloschisis, Q18.4
  • Melotia, Q17.4
  • Membrana
  • Membranacea placenta, O43.19-
  • Membranaceous uterus, N85.8
  • Membrane, membranous (s)
  • Membranitis
  • Memory disturbance, lack or loss
  • Menadione deficiency, E56.1
  • Menarche
  • Mendacity, pathologic, F60.2
  • Mendelson\’s syndrome (due to anesthesia), J95.4
  • Meninges, meningeal
  • Meningioma
  • Meningiomatosis (diffuse)
  • Meningism
  • Meningismus (infectional) (pneumococcal), R29.1
  • Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic), G03.9
  • Meningocele (spinal)
  • Meningocerebritis
  • Meningococcemia, A39.4
  • Meningococcus, meningococcal, A39.9
  • Meningoencephalitis, G04.90
  • Meningoencephalocele
  • Meningoencephalomyelitis
  • Meningoencephalomyelopathy, G96.9
  • Meningoencephalopathy, G96.9
  • Meningomyelitis
  • Meningomyelocele
  • Meningomyeloneuritis
  • Meningoradiculitis
  • Meningovascular
  • Menkes\’ disease or syndrome, E83.09
  • Menometrorrhagia, N92.1
  • Menopause, menopausal (asymptomatic) (state), Z78.0
  • Menorrhagia (primary), N92.0
  • Menostaxis, N92.0
  • Menses, retention, N94.89
  • Menstrual
  • Menstruation
  • Mental
  • Meralgia paresthetica, G57.1-
  • Mercurial
  • Mercurialism
  • Merkel cell tumor
  • Merocele
  • Meromelia
  • MERRF syndrome (myoclonic epilepsy associated with ragged-red fiber), E88.42
  • Merzbacher-Pelizaeus disease, E75.29
  • Mesaortitis
  • Mesarteritis
  • Mesencephalitis
  • Mesenchymoma
  • Mesenteritis
  • Mesentery, mesenteric
  • Mesio-occlusion, M26.213
  • Mesiodens, mesiodentes, K00.1
  • Mesocolon
  • Mesonephroma (malignant)
  • Mesophlebitis
  • Mesostromal dysgenesia, Q13.89
  • Mesothelioma (malignant), C45.9
  • Metabolic syndrome, E88.81
  • Metagonimiasis, B66.8
  • Metagonimus infestation (intestine), B66.8
  • Metal
  • Metamorphopsia, H53.15
  • Metaplasia
  • Metastasis, metastatic
  • Metastrongyliasis, B83.8
  • Metatarsalgia, M77.4-
  • Metatarsus, metatarsal
  • Methadone use
  • Methemoglobinemia, D74.9
  • Methemoglobinuria
  • Methioninemia, E72.19
  • Methylmalonic acidemia, E71.120
  • Metritis (catarrhal) (hemorrhagic) (septic) (suppurative)
  • Metropathia hemorrhagica, N93.8
  • Metroperitonitis
  • Metrorrhagia, N92.1
  • Metrorrhexis
  • Metrosalpingitis, N70.91
  • Metrostaxis, N93.8
  • Metrovaginitis
  • Meyer-Schwickerath and Weyers syndrome, Q87.0
  • Meynert\’s amentia (nonalcoholic), F04
  • Mibelli\’s disease (porokeratosis), Q82.8
  • Mice, joint
  • Micrencephalon, micrencephaly, Q02
  • Microalbuminuria, R80.9
  • Microaneurysm, retinal
  • Microangiopathy (peripheral), I73.9
  • Microcalcifications, breast, R92.0
  • Microcephalus, microcephalic, microcephaly, Q02
  • Microcheilia, Q18.7
  • Microcolon (congenital), Q43.8
  • Microcornea (congenital), Q13.4
  • Microcytic
  • Microdeletions NEC, Q93.88
  • Microdontia, K00.2
  • Microdrepanocytosis, D57.40
  • Microembolism
  • Microencephalon, Q02
  • Microfilaria streptocerca infestation
  • Microgastria (congenital), Q40.2
  • Microgenia, M26.06
  • Microgenitalia, congenital
  • Microglioma
  • Microglossia (congenital), Q38.3
  • Micrognathia, micrognathism (congenital) (mandibular) (maxillary), M26.09
  • Microgyria (congenital), Q04.3
  • Microinfarct of heart
  • Microlentia (congenital), Q12.8
  • Microlithiasis, alveolar, pulmonary, J84.02
  • Micromastia, N64.82
  • Micromyelia (congenital), Q06.8
  • Micropenis, Q55.62
  • Microphakia (congenital), Q12.8
  • Microphthalmos, microphthalmia (congenital), Q11.2
  • Micropsia, H53.15
  • Microscopic polyangiitis (polyarteritis), M31.7
  • Microsporidiosis, B60.8
  • Microsporon furfur infestation, B36.0
  • Microsporosis
  • Microstomia (congenital), Q18.5
  • Microtia (congenital) (external ear), Q17.2
  • Microtropia, H50.40
  • Microvillus inclusion disease (MVD) (MVID), Q43.8
  • Micturition
  • Mid plane
  • Middle
  • Miescher\’s elastoma, L87.2
  • Mietens\’ syndrome, Q87.2
  • Migraine (idiopathic), G43.909
  • Migrant, social, Z59.00
  • Migration, anxiety concerning, Z60.3
  • Migratory, migrating
  • Mikity-Wilson disease or syndrome, P27.0
  • Mikulicz\’ disease or syndrome, K11.8
  • Miliaria, L74.3
  • Miliary
  • Milium, L72.0
  • Milk
  • Milk-alkali disease or syndrome, E83.52
  • Milk-leg (deep vessels) (nonpuerperal)
  • Milkman\’s disease or syndrome, M83.8
  • Milky urine
  • Millard-Gubler paralysis or syndrome (-Foville), G46.3
  • Millar\’s asthma, J38.5
  • Miller Fisher syndrome, G61.0
  • Millstone maker\’s pneumoconiosis, J62.8
  • Mills\’ disease
  • Milroy\’s disease (chronic hereditary edema), Q82.0
  • Minamata disease, T56.1
  • Miners\’ asthma or lung, J60
  • Minkowski-Chauffard syndrome
  • Minor
  • Minor\’s disease (hematomyelia), G95.19
  • Minot-von Willebrand-Jurgens disease or syndrome (angiohemophilia)
  • Minot\’s disease, newborn (hemorrhagic disease), P53
  • Minus (and plus) hand (intrinsic)
  • Miosis (pupil), H57.03
  • Mirizzi\’s syndrome (hepatic duct stenosis), K83.1
  • Mirror writing, F81.0
  • MIS-A, M35.81
  • MIS-C, M35.81
  • Misadventure (of) (prophylactic) (therapeutic), T88.9
  • Miscarriage, O03.9
  • Misdirection, aqueous, H40.83-
  • Misperception, sleep state, F51.02
  • Misplaced, misplacement
  • Missed
  • Missing
  • Misuse of drugs, F19.99
  • Mitchell\’s disease (erythromelalgia), I73.81
  • Mite (s) (infestation), B88.9
  • Mitral
  • Mittelschmerz, N94.0
  • Mixed
  • MMN (multifocal motor neuropathy), G61.82
  • MNGIE syndrome (Mitochondrial Neurogastrointestinal Encephalopathy), E88.49
  • Mobile, mobility
  • Mobitz heart block (atrioventricular), I44.1
  • Moebius, Möbius
  • Moeller\’s glossitis, K14.0
  • Mohr\’s syndrome (Types I and II), Q87.0
  • Mola destruens, D39.2
  • Molar pregnancy, O02.0
  • Molarization of premolars, K00.2
  • Molding, head – omit code (during birth)
  • Mole (pigmented)
  • Molimen, molimina (menstrual), N94.3
  • Molluscum contagiosum (epitheliale), B08.1
  • Mondini\’s malformation (cochlea), Q16.5
  • Mondor\’s disease, I80.8
  • Monge\’s disease, T70.29
  • Monilethrix (congenital), Q84.1
  • Moniliasis, B37.9
  • Monitoring (encounter for)
  • Monkey malaria, B53.1
  • Monkeypox, B04
  • Monoarthritis, M13.10
  • Monoblastic
  • Monochromat (ism), monochromatopsia (acquired) (congenital), H53.51
  • Monocytic
  • Monocytopenia, D72.818
  • Monocytosis (symptomatic), D72.821
  • Monomania
  • Mononeuritis, G58.9
  • Mononeuropathy, G58.9
  • Mononucleosis, infectious, B27.90
  • Monoplegia, G83.3-
  • Monorchism, monorchidism, Q55.0
  • Monosomy, Q93.9
  • Monster, monstrosity (single), Q89.7
  • Monteggia\’s fracture (-dislocation), S52.27-
  • Mooren\’s ulcer (cornea)
  • Moore\’s syndrome
  • Mooser-Neill reaction, A75.2
  • Mooser\’s bodies, A75.2
  • Morbidity not stated or unknown, R69
  • Morbilli
  • Morbus
  • Morel syndrome (-Stewart)(-Morgagni), M85.2
  • Morel-Kraepelin disease
  • Morel-Moore syndrome, M85.2
  • Morgagni-Stewart-Morel syndrome, M85.2
  • Morgagni-Stokes-Adams syndrome, I45.9
  • Morgagni-Turner syndrome (-Albright), Q96.9
  • Morgagni\’s
  • Moria, F07.0
  • Moron (I.Q.50-69), F70
  • Morphea, L94.0
  • Morphinism (without remission), F11.20
  • Morphinomania (without remission), F11.20
  • Morquio disease or syndrome (-Ullrich)(-Brailsford)
  • Mortification (dry) (moist)
  • Morton\’s metatarsalgia (neuralgia)(neuroma) (syndrome), G57.6-
  • Morvan\’s disease or syndrome, G60.8
  • Mosaicism, mosaic (autosomal) (chromosomal)
  • Moschowitz\’ disease, M31.19
  • Mother yaw, A66.0
  • Motion sickness (from travel, any vehicle) (from roundabouts or swings), T75.3
  • Mottled, mottling, teeth (enamel) (endemic) (nonendemic), K00.3
  • Mounier-Kuhn syndrome, Q32.4
  • Mountain
  • Mouse, joint
  • Mouth
  • Movable
  • Movements, dystonic, R25.8
  • Moyamoya disease, I67.5
  • MRSA (Methicillin resistant Staphylococcus aureus)
  • MSD (multiple sulfatase deficiency), E75.26
  • MSSA (Methicillin susceptible Staphylococcus aureus)
  • Mucha-Habermann disease, L41.0
  • Mucinosis (cutaneous) (focal) (papular) (reticular erythematous) (skin), L98.5
  • Mucocele
  • Mucolipidosis
  • Mucopolysaccharidosis, E76.3
  • Mucormycosis, B46.5
  • Mucositis (ulcerative), K12.30
  • Mucositis necroticans agranulocytica
  • Mucous
  • Mucoviscidosis, E84.9
  • Mucus
  • Muguet, B37.0
  • Mulberry molars (congenital syphilis), A50.52
  • Multicystic kidney (development), Q61.4
  • Multiparity (grand), Z64.1
  • Multipartita placenta, O43.19-
  • Multiple, multiplex
  • Multisystem inflammatory syndrome (in adult) (in children), M35.81
  • Mumps, B26.9
  • Mumu, B74.9
  • Mural
  • Murmur (cardiac) (heart) (organic), R01.1
  • Murri\’s disease (intermittent hemoglobinuria), D59.6
  • Muscle, muscular
  • Musculoneuralgia
  • Mushroom-workers\’ disease or lung (pickers\’), J67.5
  • Mushrooming hip
  • Mutation (s)
  • Mutism
  • MVD (microvillus inclusion disease), Q43.8
  • MVID (microvillus inclusion disease), Q43.8
  • Myalgia, M79.10
  • Myasthenia, G70.9
  • Myasthenic, M62.81
  • Mycelium infection, B49
  • Mycetismus
  • Mycetoma, B47.9
  • Mycobacteriosis
  • Mycobacterium, mycobacterial (infection), A31.9
  • Mycoplasma pneumoniae, as cause of disease classified elsewhere (M.), B96.0
  • Mycosis, mycotic, B49
  • Mydriasis (pupil), H57.04
  • Myelatelia, Q06.1
  • Myelinolysis, pontine, central, G37.2
  • Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute), G04.91
  • Myelo-osteo-musculodysplasia hereditaria, Q79.8
  • Myeloblastic
  • Myeloblastoma
  • Myelocele
  • Myelocystocele
  • Myelocytic
  • Myelodysplasia, D46.9
  • Myelodysplastic syndrome, D46.9
  • Myeloencephalitis
  • Myelofibrosis, D75.81
  • Myelogenous
  • Myeloid
  • Myelokathexis, D70.9
  • Myeloleukodystrophy, E75.29
  • Myelolipoma
  • Myeloma (multiple), C90.0-
  • Myelomalacia, G95.89
  • Myelomatosis, C90.0-
  • Myelomeningitis
  • Myelomeningocele (spinal cord)
  • Myelopathic
  • Myelopathy (spinal cord), G95.9
  • Myelophthisis, D61.82
  • Myeloradiculitis, G04.91
  • Myeloradiculodysplasia (spinal), Q06.1
  • Myelosarcoma, C92.3-
  • Myelosclerosis, D75.89
  • Myelosis
  • Myiasis (cavernous), B87.9
  • Myoadenoma, prostate
  • Myoblastoma
  • Myocardial
  • Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic), I42.9
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile), I51.4
  • Myocardium, myocardial
  • Myocardosis
  • Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex), G25.3
  • Myocytolysis, I51.5
  • Myodiastasis
  • Myoendocarditis
  • Myoepithelioma
  • Myofasciitis (acute)
  • Myofibroma
  • Myofibromatosis, D48.1
  • Myofibrosis, M62.89
  • Myofibrositis, M79.7
  • Myoglobulinuria, myoglobinuria (primary), R82.1
  • Myokymia, facial, G51.4
  • Myolipoma
  • Myoma
  • Myomalacia, M62.89
  • Myometritis
  • Myometrium
  • Myonecrosis, clostridial, A48.0
  • Myopathy, G72.9
  • Myopericarditis
  • Myopia (axial) (congenital), H52.1-
  • Myosarcoma
  • Myosis (pupil), H57.03
  • Myositis, M60.9
  • Myospasia impulsiva, F95.2
  • Myotonia (acquisita) (intermittens), M62.89
  • Myotonic pupil
  • Myriapodiasis, B88.2
  • Myringitis, H73.2-
  • Mysophobia, F40.228
  • Mytilotoxism
  • Myxadenitis labialis, K13.0
  • Myxedema (adult) (idiocy) (infantile) (juvenile), E03.9
  • Myxochondrosarcoma
  • Myxofibroma
  • Myxofibrosarcoma
  • Myxolipoma, D17.9
  • Myxoliposarcoma
  • Myxoma
  • Myxosarcoma